WO2014101409A1

WO2014101409A1 - Data backup method and related device and system

Info

Publication number: WO2014101409A1
Application number: PCT/CN2013/080459
Authority: WO
Inventors: 邹锋哨
Original assignee: 华为技术有限公司
Priority date: 2012-12-27
Filing date: 2013-07-31
Publication date: 2014-07-03
Also published as: CN103064763B; CN103064763A

Abstract

Disclosed are a data backup method and a related device and system. The data backup method provided in this embodiment involves receiving a backup indication for triggering a backup policy sent from a backup server through a main storage device, then processing through a snapshot technology, and sending backed up data to the backup server and a backup storage device. No application server is involved in a backup process, preventing the service performance of an application server from being affected as a result of the application server operating client backup software or disk mirroring functional software to back up data, realizing the function of backing up data efficiently while the application server is operating normally, i.e., the data backup function and the operation of service software by the application server not interfering with each other.

Description

Data backup method and related equipment and system

The present application relates to the field of data backup technologies, and in particular, to a data backup method and related devices and systems. BACKGROUND OF THE INVENTION At present, data security issues are particularly important due to the proliferation of data volumes and the huge storage performance of databases and the rich application functions of devices. Therefore, various backup technologies and various backup technologies derive backup methods along with people's data. The level of awareness of the importance of protection continues to grow and develop rapidly.

Data backup technology refers to the process of copying all or part of the data set from the hard disk or array of the application host to other storage media in order to prevent data loss caused by operating errors or system failures. The traditional host-based backup usually runs the disk mirroring function software in the application server. When the write operation of the logical unit number in the primary storage device is sent to the primary storage device, it is distributed to the backup storage device to back up the data. Back up the storage device; or run the client backup software in the application server, record the write operation to the primary storage device, and then periodically send the recorded write operation to the backup server, so that the backup server sends the recorded write operation to the backup storage. device. When the traditional host-based backup scheme is adopted, if the amount of backup data is large, the memory consumption of the application server is very large, and the application server runs the client backup software or the disk mirroring function software, and also runs application software of other services, not only It affects the rate and quality of backup data and also affects other application performance of the application server. SUMMARY OF THE INVENTION The embodiments of the present application provide a data backup method and related device, which solves the problem that the existing backup method affects other application performance of the application server while implementing backup based on the application server.

In a first aspect, the embodiment of the present application provides a data backup method, including:

Receiving, by the primary storage device, a backup indication sent by the backup server, where the backup indication is used to instruct the primary storage device to generate a snapshot of the source volume;

The primary storage device generates a snapshot of the source volume; The primary storage device sends a snapshot identifier of the snapshot to the backup server; the primary storage device receives signaling sent by the backup server to query a valid data bitmap of the snapshot;

The primary storage device queries the valid data bitmap of the snapshot according to the signaling of querying the valid data bitmap of the snapshot;

The primary storage device sends a valid data bitmap of the snapshot to the backup server, so that the backup server backs up the valid data bitmap of the snapshot to the backup storage device;

The primary storage device receives signaling sent by the backup server to query valid data corresponding to the valid data bitmap of the snapshot;

The primary storage device queries the valid data according to the signaling of querying the valid data corresponding to the valid data bitmap of the snapshot;

The primary storage device sends the valid data to the backup server to cause the backup server to back up the valid data to the backup storage device.

With reference to the first aspect, in a first possible implementation, before the primary storage device generates a snapshot of the source volume, the method further includes:

The primary storage device creates a source volume;

The primary storage device maps the source volume to an application server, so that the application server mounts the source volume to store data of the application server to the source volume.

With reference to the first aspect, in a second possible implementation manner, after the primary storage device sends the snapshot identifier of the snapshot to the backup server, and the primary storage device receives the query sent by the backup server, Before the signaling of the valid data bitmap of the snapshot, the method further includes:

Receiving, by the primary storage device, the first indication sent by the backup server, where the first indication is used to instruct the primary storage device to establish a mapping relationship between the snapshot and the backup server;

And the primary storage device establishes a mapping relationship between the snapshot and the backup server according to the first indication, so that the backup server mounts the snapshot.

In conjunction with the second possible implementation of the first aspect, in a third possible implementation, the method further includes:

Receiving, by the primary storage device, a second indication sent by the backup server, where the second indication is used to instruct the primary storage device to release a mapping relationship between the backup server and the snapshot; The primary storage device releases the mapping relationship between the backup server and the snapshot. With reference to the first aspect, or any one of the first possible implementation to the third possible implementation, in a fourth possible implementation, the method further includes: Receiving, by the primary storage device, a third indication sent by the backup server, where the third indication is used to instruct the primary storage device to delete the snapshot of the source volume;

The primary storage device deletes the snapshot of the source volume.

In a second aspect, the embodiment of the present application provides a data backup method, including:

The backup server sends a backup indication to the primary storage device to instruct the primary storage device to generate a snapshot of the source volume, and the primary storage device sends the snapshot identifier of the snapshot to the backup server;

Receiving, by the backup server, a snapshot identifier sent by the primary storage device;

The backup server sends a signaling for querying the valid data bitmap of the snapshot to the primary storage device, so that the primary storage device queries the snapshot according to the signaling of querying the valid data bitmap of the snapshot. Valid data bitmap;

The backup server receives a valid data bitmap of the snapshot sent by the primary storage device; the backup server divides the valid data bitmap of the snapshot to a backup storage device;

Receiving, by the backup server, feedback information of the valid data bitmap of the snapshot that is backed up by the backup storage device;

And the backup server sends, according to the feedback information of the valid data bitmap of the snapshot that is backed up, the signaling for querying the valid data corresponding to the valid data bitmap of the snapshot to the primary storage device, so that The primary storage device queries the valid data according to the signaling that queries the valid data corresponding to the valid data bitmap of the snapshot;

The backup server receives the valid data sent by the primary storage device;

The backup server divides the valid data into the backup storage device;

The backup server receives feedback information of the valid data that has been backed up by the backup storage device and backed up the snapshot.

With reference to the second aspect, in a first possible implementation manner, after the backup server receives the snapshot identifier sent by the primary storage device, and the backup server sends a signaling for querying the valid data bitmap of the snapshot Before the primary storage device, the method further includes: The backup server sends a first indication to the primary storage device, so that the primary storage device establishes a mapping relationship between the snapshot and the backup server according to the first indication.

The backup server mounts the snapshot according to a mapping relationship between the snapshot and the backup server.

In conjunction with the first possible implementation of the second aspect, in a second possible implementation, the method further includes:

The backup server sends a second indication to the primary storage device, so that the primary storage device removes the mapping relationship between the backup server and the snapshot.

With reference to the second aspect, or the first possible implementation manner of the second aspect, or the second possible implementation manner, in a third possible implementation manner, the method further includes:

The backup server sends a third indication to the primary storage device to cause the primary storage device to delete the snapshot of the source volume.

In a third aspect, the embodiment of the present application provides a data backup method, including:

The primary storage device receives the backup indication that the backup server sends the interval according to the preset time interval, and the backup indication is used to instruct the primary storage device to generate a snapshot, where the preset time is the current backup data and the current backup data. The time interval of the previous backup data;

The primary storage device generates a snapshot according to the backup indication;

Sending, by the primary storage device, a snapshot identifier of the snapshot to the backup server;

Receiving, by the primary storage device, a signal of a difference data bitmap between the snapshots when the current backup data is queried by the backup server and the previous backup data adjacent to the current backup data;

The primary storage device queries the current backup data according to the signaling of the difference data bitmap between the snapshot when the current backup data is queried and the previous backup data adjacent to the current backup data. The difference data bitmap between the snapshot and the snapshot when the previous backup data is adjacent to the current backup data;

Sending, by the primary storage device, the difference data bitmap between the snapshot of the current backup data and the snapshot of the previous backup data adjacent to the current backup data to the backup server, so that the The backup server backs up the difference data bitmap between the snapshot of the current backup data and the snapshot of the previous backup data adjacent to the current backup data to the backup storage device; Receiving, by the primary storage device, signaling for querying difference data corresponding to the difference data bitmap of the backup server;

The primary storage device queries the difference data according to the signal that queries the difference data corresponding to the difference data bitmap.

The primary storage device sends the difference data to the backup server to cause the backup server to back up the difference data to the backup storage device.

With reference to the third aspect, in a first possible implementation manner, after the primary storage device sends the snapshot identifier of the snapshot to the backup server, and the primary storage device receives the query sent by the backup server, The method further includes: before the snapshot of the backup data and the signaling of the difference data bitmap between the snapshots of the previous backup data adjacent to the current backup data, the method further includes:

In conjunction with the first possible implementation of the third aspect, in a second possible implementation, the method further includes:

Receiving, by the primary storage device, a second indication sent by the backup server, where the second indication is used to instruct the primary storage device to release a mapping relationship between the backup server and the snapshot;

The primary storage device releases the mapping relationship between the backup server and the snapshot.

With reference to the third aspect, or the first possible implementation manner of the third aspect, or the second possible implementation manner, in a third possible implementation manner, the method further includes:

Receiving, by the primary storage device, a third indication sent by the backup server, where the third indication is used to indicate that a snapshot of the previous backup data adjacent to the current backup data is deleted;

The primary storage device deletes a snapshot of the previous backup data adjacent to the current backup data.

In a fourth aspect, the embodiment of the present application provides a data backup method, including:

The backup server sends the backup indication to the primary storage device intermittently according to the preset time, so that the primary storage device generates a snapshot according to the backup indication, and the primary storage device generates a snapshot and sends the snapshot. The snapshot of the snapshot is identified to the backup server; the preset time is a time interval between the backup data and the previous backup data adjacent to the current backup data;

The backup server receives the snapshot identifier of the snapshot sent by the primary storage device; the backup server sends the previous backup data adjacent to the current backup data when the snapshot is queried for the current backup data. Signaling of the difference data bitmap between the snapshots to the primary storage device, so that the primary storage device queries the snapshot of the current backup data and the previous backup adjacent to the current backup data The difference data bitmap between snapshots at the time of data;

And the difference data bitmap between the snapshot when the backup server receives the current backup data and the snapshot when the previous backup data is adjacent to the current backup data;

The backup server backs up the difference data bitmap between the snapshot of the current backup data and the snapshot of the previous backup data adjacent to the current backup data to the backup storage device;

Receiving, by the backup server, feedback information of the difference data bitmap that has been backed up by the backup storage device;

The backup server sends a signaling for querying the difference data corresponding to the difference data bitmap to the primary storage device, so that the primary storage device queries the difference data corresponding to the difference data bitmap; the backup server receives The difference data sent by the primary storage device;

The backup server divides the difference data into the backup storage device;

The backup server receives the feedback information sent by the backup storage device that has backed up the difference data.

With reference to the fourth aspect, in a first possible implementation manner, after the backup server receives the snapshot identifier of the snapshot sent by the primary storage device, and when the backup server sends the query for the current backup data, The method further includes: before the signaling of the difference data bitmap between the snapshots of the previous backup data and the current backup data to the primary storage device, the method further includes:

The backup server sends a first indication to the primary storage device, so that the primary storage device establishes a mapping relationship between the snapshot and the backup server according to the first indication.

The backup server mounts the snapshot according to the mapping relationship.

With the first possible implementation of the fourth aspect, in a second possible implementation, the method further includes: The backup server sends a second indication to the primary storage device, so that the primary storage device releases the mapping relationship between the backup server and the snapshot according to the second indication.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, or the second possible implementation manner, in a third possible implementation manner, the method further includes:

And the backup server sends a third indication to the primary storage device, so that the primary storage device deletes a snapshot of the previous backup data adjacent to the current backup data according to the third indication.

In a fifth aspect, the embodiment of the present application provides a storage device, including:

a receiving unit, configured to receive a backup indication sent by the backup server, where the backup indication is used to instruct the storage device to generate a snapshot of the source volume;

a snapshot unit, configured to generate a snapshot of the source volume;

a sending unit, configured to send a snapshot identifier of the snapshot to the backup server;

The receiving unit is further configured to receive signaling sent by the backup server to query a valid data bitmap of the snapshot;

a processing unit, configured to query, according to the signaling of the valid data bitmap of the snapshot, the valid data bitmap of the snapshot;

The sending unit is further configured to send a valid data bitmap of the snapshot to the backup server, so that the backup server backs up the valid data bitmap of the snapshot to the backup storage device;

The receiving unit is further configured to receive, by the backup server, signaling for querying valid data corresponding to the valid data bitmap of the snapshot;

The processing unit is further configured to query the valid data according to the signaling of the valid data corresponding to the valid data bitmap of the snapshot.

The sending unit is further configured to send the valid data to the backup server, so that the backup server backs up the valid data to the backup storage device.

With reference to the fifth aspect, in a first possible implementation, the storage device further includes: a creating unit, configured to create a source volume;

a mapping unit, configured to map the source volume to an application server, so that the application server mounts the source volume to store data of the application server to the source volume.

In combination with the fifth aspect, in a second possible implementation manner, The receiving unit is further configured to receive a first indication sent by the backup server, where the first indication is used to instruct the primary storage device to establish a mapping relationship between the snapshot and the backup server; And the unit is further configured to establish, according to the first indication, a mapping relationship between the snapshot and the backup server, so that the backup server mounts the snapshot.

With the second possible implementation of the fifth aspect, in a third possible implementation, the receiving unit is further configured to receive a second indication sent by the backup server, where the second indication is used to indicate The primary storage device releases the mapping relationship between the backup server and the snapshot; the processing unit is further configured to release a mapping relationship between the backup server and the snapshot. In combination with the fifth aspect or the first possible implementation of the fifth aspect or the second possible implementation manner or the third possible implementation manner,

The receiving unit is further configured to receive a third indication sent by the backup server, where the third indication is used to instruct the primary storage device to delete the snapshot of the source volume;

The processing unit is further configured to delete the snapshot of the source volume.

In a sixth aspect, an embodiment of the present application provides a server, including:

a sending unit, configured to send a backup indication to the primary storage device, to indicate that the primary storage device generates a snapshot of the source volume, and send, by the primary storage device, a snapshot identifier of the snapshot to the backup server; Receiving a snapshot identifier sent by the primary storage device;

The sending unit is further configured to send signaling for querying the valid data bitmap of the snapshot to the primary storage device, so that the primary storage device performs signaling according to the querying the valid data bitmap of the snapshot. Querying a valid data bitmap of the snapshot;

The receiving unit is further configured to receive a valid data bitmap of the snapshot sent by the primary storage device;

a backup unit, configured to divide the valid data bitmap of the snapshot into a backup storage device;

The receiving unit is further configured to receive, by the backup storage device, feedback information of a valid data bitmap of the snapshot that has been backed up;

The sending unit is further configured to send, according to the feedback information of the valid data bitmap of the snapshot that has been backed up, the signaling for querying the valid data corresponding to the valid data bitmap of the snapshot to the primary storage. The device, to enable the primary storage device to query the valid data according to the signaling that queries the valid data corresponding to the valid data bitmap of the snapshot; The receiving unit is further configured to receive the valid data that is sent by the primary storage device; the backup unit is further configured to back up the valid data to the backup storage device;

The receiving unit is further configured to receive feedback information of the valid data that is backed up by the backup storage device and that is backed up by the snapshot.

In combination with the sixth aspect, in a first possible implementation manner,

The sending unit is further configured to send the first indication to the primary storage device according to the snapshot identifier, so that the primary storage device establishes a mapping between the snapshot and the backup server according to the first indication. Relationship

The server further includes: a processing unit, configured to mount the snapshot according to a mapping relationship between the snapshot and the server.

With reference to the first possible implementation manner of the sixth aspect, in a second possible implementation, the sending unit is further configured to send a second indication to the primary storage device, so that the primary storage device is released a mapping relationship between the backup server and the snapshot.

With reference to the second aspect or the first possible implementation of the second aspect or the second possible implementation manner, in a third possible implementation manner,

The sending unit is further configured to send a third indication to the primary storage device, so that the primary storage device deletes the snapshot of the source volume. In a seventh aspect, the embodiment of the present application provides a storage device, including:

a receiving unit, configured to receive a backup indication that is sent by the backup server according to a preset time interval, where the backup indication is used to instruct the storage device to generate a snapshot, where the preset time is the current backup data and the current backup data. The time interval of the previous backup data of the neighbor;

a snapshot unit, configured to generate a snapshot according to the backup indication;

The receiving unit is further configured to receive a letter of a difference data bitmap between snapshots when the snapshot of the current backup data sent by the backup server and the previous backup data adjacent to the backup data is sent by the backup server Order

a processing unit, configured to perform, according to the signaling query of the difference data bitmap between the snapshot when the current backup data is in the query and the previous backup data adjacent to the current backup data, the current query a difference data bitmap between a snapshot of the data and a snapshot of the previous backup data adjacent to the current backup data;

The sending unit is further configured to send the difference data bitmap between the snapshots of the current backup data and the previous backup data adjacent to the current backup data to the backup server, to And causing the backup server to back up the difference data bitmap between the snapshot of the current backup data and the snapshot of the previous backup data adjacent to the current backup data to the backup storage device;

The receiving unit is further configured to receive signaling sent by the backup server to query difference data corresponding to the difference data bitmap.

The processing unit is further configured to query the difference data according to the signaling of querying the difference data corresponding to the difference data bitmap.

The sending unit is further configured to send the difference data to the backup server, so that the backup server backs up the difference data to the backup storage device.

With reference to the seventh aspect, in a first possible implementation, the receiving unit is further configured to receive a first indication sent by the backup server, where the first indication is used to instruct the primary storage device to establish the a mapping relationship between the snapshot and the backup server;

The processing unit is further configured to establish, according to the first indication, a mapping relationship between the snapshot and the backup server, so that the backup server mounts the snapshot.

With reference to the first possible implementation manner of the seventh aspect, in a second possible implementation manner, the receiving unit is further configured to receive a second indication sent by the backup server, where the second indication is used to indicate The primary storage device releases the mapping relationship between the backup server and the snapshot; the processing unit is further configured to release a mapping relationship between the backup server and the snapshot. With reference to the seventh aspect or the first possible implementation manner of the seventh aspect or the second possible implementation manner, in a third possible implementation manner,

The receiving unit is further configured to receive a third indication sent by the backup server, where the third indication is used to indicate to delete a snapshot when the previous backup data is adjacent to the current backup data;

The processing unit is further configured to delete a snapshot of the previous backup data adjacent to the current backup data.

In an eighth aspect, an embodiment of the present application provides a server, including: a sending unit, configured to send a backup indication to the primary storage device intermittently according to a preset time, so that the primary storage device generates a snapshot according to the backup indication, generates a snapshot by the primary storage device, and sends the snapshot The snapshot is identified to the backup server; the preset time is a time interval between the backup data and the previous backup data adjacent to the backup data;

a receiving unit, configured to receive a snapshot identifier of the snapshot sent by the primary storage device, where the sending unit is further configured to send the snapshot when the current backup data is queried adjacent to the current backup data The signaling of the difference data bitmap between the snapshots of the previous backup data to the primary storage device, so that the primary storage device queries the snapshot of the current backup data and the current backup data The difference data bitmap between the snapshots of the neighbor when the data was previously backed up;

The receiving unit is further configured to receive the difference data bitmap between the snapshot when the current backup data is current and the snapshot when the previous backup data is adjacent to the current backup data;

a backup unit, configured to back up the difference data bitmap between the snapshot of the current backup data and the snapshot of the previous backup data adjacent to the current backup data to the backup storage device;

The receiving unit is further configured to receive feedback information that is sent by the backup storage device and that is backed up by the difference data bitmap;

The sending unit is further configured to send, to the primary storage device, the signaling that is used to query the difference data corresponding to the difference data bitmap, so that the primary storage device queries the difference data corresponding to the difference data bitmap.

The receiving unit is further configured to receive the difference data sent by the primary storage device; the backup unit is further configured to back up the difference data to the backup storage device;

The receiving unit is further configured to receive feedback information that is sent by the backup storage device and that is backed up by the difference data.

In combination with the eighth aspect, in a first possible implementation manner,

The sending unit is further configured to send a first indication to the primary storage device according to the snapshot identifier of the snapshot, so that the primary storage device establishes the snapshot between the snapshot and the backup server according to the first indication. Mapping relationship;

The server further includes: a processing unit, configured to mount the snapshot according to the mapping relationship. In conjunction with the first possible implementation of the eighth aspect, in a second possible implementation manner, The sending unit is further configured to send a second indication to the primary storage device, so that the primary storage device releases the mapping relationship between the backup server and the snapshot according to the second indication.

With reference to the eighth aspect or the first possible implementation of the eighth aspect or the second possible implementation manner, in a third possible implementation manner,

The sending unit is further configured to send a third indication to the primary storage device, so that the primary storage device deletes a snapshot of a previous backup data adjacent to the current backup data according to the third indication. .

The ninth aspect, the embodiment of the present application provides a data backup system, including the fifth aspect or the primary storage device of any one of the first possible implementation manner to the fourth possible implementation manner of the fifth aspect, And the backup server including the sixth aspect of the claim or the first possible implementation to the third possible implementation of the sixth aspect; the data backup system further includes:

a backup storage device, configured to store a valid data bitmap of a snapshot of the source volume sent by the backup server; the backup storage device is further configured to send feedback information of the valid data bitmap of the snapshot that has been backed up to the backup server;

The backup storage device is further configured to store valid data corresponding to the valid data bitmap sent by the backup server;

The backup storage device is further configured to send feedback information of valid data of the snapshot to the backup server.

The tenth aspect, the embodiment of the present application provides a data backup system, including the seventh aspect or the primary storage device of any one of the first possible implementation manner to the third possible implementation manner of the seventh aspect, And a backup server provided by the eighth aspect or combined with the first possible implementation manner of the eighth aspect to the third possible implementation manner; the data backup system further includes: a backup storage device, configured to: a difference data bitmap between the snapshot when the backup data is stored and the snapshot when the previous backup data is adjacent to the current backup data;

The backup storage device is further configured to send feedback information of the difference data bitmap that has been backed up to the backup server;

The backup storage device is further configured to store the difference data corresponding to the difference data bitmap to the backup storage device; The backup storage device is further configured to send feedback information that has stored the difference data to the backup server.

After receiving the backup instruction of the triggering backup policy sent by the backup server, the primary storage device processes the snapshot data to send the backup data to the backup server and the backup storage device. The application server does not participate in the backup process. The application server runs the client backup software or the disk mirroring function software to back up the data, which affects the service performance of the application server itself, and realizes the function of efficiently backing up the data while the application server is running normally, that is, the backup data function and the application server running the service. The software does not interfere with each other.

The embodiment of the present application sends a valid data bitmap of the snapshot of the source volume to the backup server by using the primary storage device, so that the backup server sends a valid data bitmap or further sends valid data corresponding to the valid data bitmap to the backup storage device, so that the backup storage device is enabled. The backup storage device can back up valid data, so that the backup data cannot be backed up without backing up invalid data. Or, the difference data bitmap between the snapshot of the current backup data and the snapshot of the previous backup data adjacent to the backup data is sent to the backup server by the primary storage device, so that the backup server sends the backup server twice. The difference data bitmap of the snapshot when the data is backed up or the difference data corresponding to the difference data bitmap is sent to the backup storage device, so that the backup storage device only backs up the differentiated data, which saves the storage space of the backup storage device and further improves Backup efficiency. The full backup or incremental backup makes the backup scheme more selective and has no impact on the performance of the application server, and the valid data, valid bitmap or difference data difference data bitmap is stored in the file through the backup server. Using a different model than the primary storage, which supports heterogeneous storage, enhances the general applicability of each device in the backup system. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly described below, and obviously, in the following description The drawings are only some of the embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

1 is a flowchart of a data backup method according to Embodiment 1 of the present application;

2 is a flowchart of a data backup method according to Embodiment 2 of the present application; 3a is a schematic diagram of a shared storage architecture provided by an embodiment of the present application;

FIG. 3b is a full data bitmap of the full backup provided by the embodiment of the present application;

FIG. 3c is a schematic diagram of data bitmaps corresponding to snapshots obtained during the first backup provided by the embodiment of the present application;

FIG. 3 is a schematic diagram of a difference data bitmap obtained when the first backup is provided in the embodiment of the present application; FIG. 3 e is a schematic diagram of a difference data bitmap obtained when the second backup is provided in the embodiment of the present application; FIG. 3g is a schematic diagram of a full-size data bitmap obtained when the third backup is restored according to the embodiment of the present application;

4 is a flowchart of a data backup method according to Embodiment 3 of the present application;

5 is a flowchart of a data backup method according to Embodiment 4 of the present application;

6 is a schematic structural diagram of a storage device according to Embodiment 5 of the present application;

7 is a schematic structural diagram of another storage device provided in Embodiment 5 of the present application;

8 is a schematic structural diagram of a server provided in Embodiment 6 of the present application;

9 is a schematic structural diagram of another server provided in Embodiment 6 of the present application;

FIG. 10 is a schematic structural diagram of a storage device according to Embodiment 7 of the present application;

11 is a schematic structural diagram of another storage device provided in Embodiment 7 of the present application;

FIG. 12 is a schematic structural diagram of a server according to Embodiment 8 of the present application;

13 is a schematic structural diagram of another server provided in Embodiment 8 of the present application;

FIG. 14 is a schematic structural diagram of a data backup system according to Embodiment 9 of the present application; FIG. 15 is a schematic structural diagram of a data backup system according to Embodiment 10 of the present application.

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present application. It is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. example. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

The detailed description will be respectively made below through specific embodiments.

The first embodiment of the present application provides a data backup method, which is mainly based on backup of a data block. In the shared storage architecture, the data of the application server is saved on the underlying primary storage device. To ensure the reliability of the server, the data stored in the underlying primary storage device is usually backed up to avoid loss when the application fails. The data cannot be restored to normal. In this embodiment, data backup is performed by using a backup server and a backup storage device. Specifically, please refer to FIG. 1. FIG. 1 is a flowchart of a data backup method according to Embodiment 1 of the present application. The data backup method provided in Embodiment 1 is described in the perspective of a primary storage device in the case of full backup. of. As shown in FIG. 1, the data backup method provided in this embodiment includes:

Slll, the primary storage device receives the backup indication sent by the backup server.

The backup indication is used to instruct the primary storage device to generate a snapshot of the source volume.

S112. The primary storage device generates a snapshot of the source volume.

A snapshot is generated for the source volume for full backup, that is, the snapshot of the source volume can be used as a final backup to achieve full and rapid recovery of the application system. The Storage Networking Industry Association defines snapshots as: A fully available copy of a specified data set that includes an image of the corresponding data at a point in time (the point in time when the copy begins). A snapshot can be a copy of the data it represents, or it can be a replica of the data. The main role of the snapshot is mainly to enable online data recovery, when the snapshot produces a state at a point in time. Another function of the snapshot is to provide another data access channel for the storage user. When the original data is processed online, the user can access the snapshot data, and can also use the snapshot for testing.

S113. The primary storage device sends the snapshot identifier of the snapshot to the backup server, so that the backup server sends the first indication to the primary storage device.

The first indication is used to instruct the primary storage device to establish a mapping relationship between the snapshot and the backup server.

S114. The primary storage device receives the first indication.

S115. The primary storage device establishes a mapping relationship between the snapshot and the backup server according to the first indication, so that the backup server mounts the snapshot.

S116. The primary storage device receives signaling of a valid data bitmap of the query snapshot sent by the backup server. Optionally, in other embodiments, the snapshot may not be mounted, and the primary storage device directly receives the signaling of the valid data bitmap of the query snapshot sent by the backup server, and queries the valid data bitmap. Step

S114 and step S115 may not be performed.

In step S116, the primary storage device is instructed to query the valid data bitmap of the snapshot of the source volume for full backup. The full backup policy is to back up the snapshot of the source volume, specifically to obtain valid data of the snapshot of the source volume. The valid data corresponding to the bitmap or the valid data bitmap, so as to further implement the full backup strategy of the valid data corresponding to the valid data bitmap of the snapshot of the source volume.

S117. The primary storage device queries the valid data bitmap of the snapshot according to the signaling of the valid data bitmap of the query snapshot.

S118. The primary storage device sends a valid data bitmap of the snapshot to the backup server, so that the backup server backs up the valid data bitmap of the snapshot to the backup storage device.

S119. The primary storage device receives signaling of valid data corresponding to the valid data bitmap of the query snapshot sent by the backup server.

S120. The primary storage device queries the valid data according to the signaling of the valid data corresponding to the valid data bitmap of the query snapshot.

S121. The primary storage device sends valid data to the backup server, so that the backup server backs up the valid data to the backup storage device. The backup server further backs up the valid data to the backup storage device, and the multi-level data backup makes the backup performance perfect. Even if the application server and the backup server are faulty, the valid data can be extracted from the backup storage device, and the failure of the application server can be restored. The quality of the backup. The valid data corresponding to the valid data bitmap and the valid data bitmap is obtained by the backup server, and the backup server can restore the valid data in the application server according to the valid data in the valid data bitmap. It is not necessary to back up invalid data, which reduces the amount of data backed up and improves the backup rate.

After receiving the backup instruction of the triggering backup policy sent by the backup server, the data storage method is processed by the snapshot technology to query and send the backed up data to the backup server and the backup storage device, and the data backup method is not applied in the backup process. The participation of the server avoids the application of the client backup software or the disk mirroring function software to back up the data, which affects the application server's own business performance, realizes the normal operation of the application server, and efficiently backs up the data, that is, the backup data. The function and application server running business software do not interfere with each other. Sending a valid data bitmap of the snapshot of the source volume queried by the primary storage device to the backup server, The backup server sends a valid data bitmap to the backup storage device, so that the backup storage device can back up the valid bitmap, so that the backup system can further obtain valid data, and thus the backup data cannot be backed up without backing up the invalid data.

As an optional implementation manner, before the step S111 shown in FIG. 1 , that is, before the primary storage device generates a snapshot of the source volume, the method further includes the following steps:

A. The primary storage device creates the source volume.

B. The primary storage device maps the source volume to the application server, so that the application server mounts the source volume to store the data of the application server to the source volume.

The communication connection relationship between the primary storage device and the application server is established, and the application server obtains the identifier of the source volume of the primary storage device, so as to mount the source volume to the application server, and store the data write operation of the application server. . That is, the data stored by the application server when the operating system is running.

The data backup method provided in this embodiment establishes a communication connection relationship between the primary storage device and the application server, sends the identifier of the source volume to the application server, and mounts the source volume through the application server to store the data of the application server.

As an optional implementation manner, the data backup method provided in this embodiment further includes the following steps:

1. The primary storage device receives a second indication sent by the backup server. The second indication is used to instruct the primary storage device to release the mapping relationship between the server and the snapshot.

2. The primary storage device releases the mapping relationship between the backup server and the snapshot.

As an optional implementation manner, the data backup method provided in this embodiment further includes the following steps: a. The primary storage device receives a third indication sent by the backup server. The third indication is used to instruct the primary storage device to delete the snapshot of the source volume.

b. The primary storage device deletes the snapshot of the source volume.

Referring to FIG. 2, FIG. 2 is a flowchart of a data backup method according to Embodiment 2 of the present application. The data backup method provided in the second embodiment is described in the perspective of the backup server in the case of full backup. As shown in FIG. 2, the data backup method provided in this embodiment may include the following steps:

S211. The backup server sends a backup indication to the primary storage device to instruct the primary storage device to generate a snapshot of the source volume, and the primary storage device sends the snapshot identifier of the snapshot to the backup server.

The backup indication is used to instruct the primary storage device to generate a snapshot of the source volume, to trigger the backup system to start a full backup, and execute a full backup policy. And sending, by the primary storage device, the identity of the source volume to The application server, so that the application server mounts the source volume to the application server to store the data of the application server. A communication connection relationship is established between the primary storage device and the application server, and the data write operation of the application server is stored, that is, the data stored by the application server when the operating system is running is stored.

S212. The backup server receives the snapshot identifier sent by the primary storage device.

S213. The backup server sends a first indication to the primary storage device, so that the primary storage device establishes a mapping relationship between the snapshot and the backup server according to the first indication.

5214. The backup server mounts the snapshot according to the mapping relationship between the snapshot and the backup server. Among them, the backup server can use the data in the snapshot to recover the data in the application server.

5215. The backup server sends the signaling of the valid data bitmap of the query snapshot to the primary storage device, so that the primary storage device queries the valid data bitmap of the snapshot according to the signaling of the valid data bitmap of the query snapshot.

Optionally, in other embodiments, step S213 and step S214 may be omitted, that is, the backup server does not need to mount the snapshot, and the signaling of querying the valid data bitmap of the snapshot may be sent to the primary according to the received snapshot identifier. The storage device causes the primary storage device to query the valid data bitmap of the snapshot.

The valid data bitmap of the snapshot of the source volume is used for full backup. The full backup strategy is to back up the snapshot of the source volume. Specifically, the valid data bitmap and the valid data bitmap of the snapshot of the source volume are obtained. Corresponding valid data, so as to further implement a full backup strategy of valid data corresponding to the valid data bitmap of the snapshot of the source volume.

5216. The backup server receives a valid data bitmap of the snapshot sent by the primary storage device.

5217. Back up the valid data bitmap of the backup snapshot of the server to the backup storage device.

S218. The backup server receives feedback information of a valid data bitmap of the backup snapshot sent by the backup storage device.

S219. The backup server sends the signaling of the valid data corresponding to the valid data bitmap of the snapshot to the primary storage device according to the feedback information of the valid data bitmap of the backup snapshot, so that the primary storage device corresponds to the valid data bitmap of the query snapshot. The valid data is signaled to query valid data.

Wherein, the effective bitmap is further processed to further obtain valid data corresponding to the valid data bitmap. The data in the source volume of the primary storage device can be restored according to the valid data, thereby restoring the application server to normal operation. Further backup of valid data to the backup storage device through the backup server, multi-level data backup, making the backup performance perfect, even the application server and backup service The server has a fault, and it can also extract valid data from the backup storage device, recover the failure of the application server, and improve the backup quality.

S220. The backup server receives valid data sent by the primary storage device.

S221. The backup server backs up valid data to the backup storage device.

S222. The backup server receives feedback information of valid data of the backup snapshot sent by the backup storage device.

In the data backup method provided by the embodiment, the backup server sends a backup indication that triggers the backup policy to the primary storage device, and the primary storage device processes the snapshot data to send the backup data to the backup server and the backup storage device. The participation of the server avoids the application of the client backup software or the disk mirroring function software to back up the data, which affects the application server's own business performance, realizes the normal operation of the application server, and efficiently backs up the data, that is, the backup data. The function and application server running business software do not interfere with each other. After the backup server mounts the snapshot of the source volume, the primary storage device queries the valid data bitmap of the snapshot, and sends a valid data bitmap of the snapshot to the backup server, and then the backup server receives the valid data bitmap of the snapshot sent by the primary storage device. , back up the valid data bitmap of the snapshot to the backup storage device. The backup data is not backed up, the amount of data backed up is reduced, and the backup rate is increased.

As an optional implementation manner, the data backup method provided in this embodiment further includes: the backup server sends a second indication to the primary storage device, so that the primary storage device releases the mapping relationship between the backup server and the snapshot.

As an optional implementation manner, the data backup method provided in this embodiment further includes: the backup server sending a third indication to the primary storage device, so that the primary storage device deletes the snapshot of the source volume. Referring to FIG. 3a, FIG. 3a is a schematic diagram of a shared storage architecture provided by an embodiment of the present application. As shown in FIG. 3a, the device based on the shared storage architecture applied by the data backup method in this embodiment includes: an application server 31 carrying an application operating system, a backup server 32, a primary storage device 33 with a snapshot function, and a backup storage. Device 34. The application server 31 carrying the application operating system can perform service processing, and the primary storage device 33 with the snapshot function can generate a snapshot of the operation of the data write by the application server. A communication connection relationship is established between the application server 31 and the primary storage device 33, and the source volume of the primary storage device is mounted by the application server 31 to store data of the application server 31. The backup server 32 establishes a communication connection relationship with the main storage device 33 to mount the main A snapshot generated by the storage device 33. And a communication connection relationship is established between the backup server 32 and the backup storage device 34 to back up the valid data or valid data bitmap obtained by the backup server 32 to the backup storage device 34. When the backup system executes the full backup policy, the primary storage device 33 generates a snapshot of the source volume. Further, the primary storage device 33 sends a snapshot identifier of the snapshot of the source volume to the backup server 32, so that the backup server 32 sends a first indication to the primary storage device 33, and the primary storage device 33 establishes a snapshot and backup server 32 according to the first indication. The mapping relationship between the backup server 32 allows the backup server 32 to mount the snapshot, and the backup server 32 can restore the data in the application server 31 by using the data in the snapshot. The backup server 32 sends the signaling of the valid data bitmap of the query snapshot to the primary storage device 33 to obtain a valid data bitmap, and realizes the full backup while the data needs to be backed up. Further backup server 32 may back up the valid data bitmap to backup storage device 34. The backup storage device 34 can be a general storage medium, and the snapshot function can be used to implement full backup in the same manner as the model does not match.

Further, the backup server 32 may send the signaling of the valid data corresponding to the valid data bitmap of the snapshot to the primary storage device 33 according to the feedback information of the stored valid data bitmap sent by the backup storage device 34. The primary storage device 33 is caused to query the valid data corresponding to the valid data bitmap of the snapshot. After the backup server 32 obtains valid data from the primary storage device 33, it is further backed up to the backup storage device 34. Therefore, multi-level data backup makes the backup performance perfect. Even if both the application server and the backup server are faulty, valid data can be extracted from the backup storage device, the application server failure can be restored, and the backup quality is improved.

The processing of data bitmaps under full backup is as follows:

Referring to FIG. 3b, FIG. 3b is a full-size data bitmap of the full-size backup provided by the embodiment of the present application. As shown in FIG. 3b, the block is a flag bit of the data block, and the flag bit is used to distinguish whether the data block corresponding to the byte bit has changed. Usually, 0 and 1 are used to distinguish whether the data block has changed. In this embodiment, The changed data is fast, the flag position under the byte bit corresponding to the data block is set to 1, and the block flag position corresponding to the byte bit corresponding to the unchanged data block is set to 1. As shown in FIG. 3b, the flag position 1 of the data block whose bit is marked 2 and the flag position 1 of the data block whose bit is marked 11 are shown. Further, the valid data bitmap can be obtained according to the data bitmap of the importance identifier, and the data bitmap without importance can be used without backup, or the priority of the backup data bitmap can be set according to the importance, and the data bit with high importance is The figure can be extracted in advance and transferred to the backup by the primary storage device 33. The server 32, after the data bitmap with high importance is successfully backed up, extracts the second important data bitmap for backup. The specific backup form is not limited by this embodiment.

After receiving the backup indication of the triggering backup policy sent by the backup server 32, the primary storage device 33 processes the snapshot data and sends the backup data to the backup server 32 and the backup storage device 34. The application server 31 does not participate in the backup process. The application server 31 runs the client backup software or the disk mirroring function software to back up the data, which affects the service performance of the application server 31, realizes the function of the application server 31 running normally, and efficiently backs up the data, that is, the backup data function and The application server 31 runs the business software without interfering with each other.

Referring to FIG. 4, FIG. 4 is a flow chart of a data backup method according to Embodiment 3 of the present application.

The data backup method provided in this embodiment is described in the perspective of the primary storage device in the incremental backup. As shown in FIG. 4, the data backup method provided in this embodiment includes:

The primary storage device receives the backup indication that the backup server sends the interval according to the preset time, and the backup indication is used to instruct the primary storage device to generate the snapshot. The preset time is the interval between the backup data and the previous backup data adjacent to the backup data. The incremental backup is based on the snapshot of the interval acquisition, and the difference data bitmap between the snapshots is obtained, and then the difference data corresponding to the difference data bitmap or the difference data bitmap is backed up. Therefore, the preset time is the time interval between the backup data and the previous backup data adjacent to the backup data.

5412. The primary storage device generates a snapshot according to the backup indication.

S413. The primary storage device sends the snapshot identifier of the snapshot to the backup server, so that the backup server sends the first indication to the primary storage device.

5414. The primary storage device receives the first indication.

5415. The primary storage device establishes a mapping relationship between the snapshot and the backup server according to the first indication, so that the backup server mounts the snapshot.

5416. The primary storage device receives signaling of a difference data bitmap between snapshots when the backup server sends a query for the current backup data and the previous backup data adjacent to the backup data.

Optionally, in other embodiments, step S414 and step S415 may be omitted, that is, the backup server does not need to send the first indication to the primary storage device, and the primary storage device does not need to receive the first indication, and does not need to establish. The mapping between the snapshot and the backup server. The signaling of the difference data bitmap between the snapshots of the previous backup data adjacent to the current backup data is only required to be received by the backup server to perform subsequent backup steps.

The difference data bitmap between two snapshots is used for incremental backup. The strategy of incremental backup is to back up the difference data bitmap or difference data between snapshots. To restore the data under the incremental backup policy, the sum of the data of the previous snapshot corresponding to the location where the difference data is written is the recovery data value.

5417. The primary storage device queries the snapshot of the current backup data according to the signaling of the difference data bitmap between the snapshot when the data is backed up and the previous backup data adjacent to the current backup data. The difference data bitmap between snapshots when the backup data is adjacent to the previous backup data.

5418. The difference data bitmap between the snapshot when the primary storage device sends the backup data and the previous backup data adjacent to the backup data to the backup server, so that the backup server backs up the snapshot of the current backup data. The difference data bitmap between the snapshots of the previous backup data adjacent to this backup data to the backup storage device.

S419. The primary storage device receives signaling of the difference data corresponding to the query difference data bitmap sent by the backup server.

S420. The primary storage device queries the difference data according to the signaling of the difference data corresponding to the query difference data bitmap.

S421. The primary storage device sends the difference data to the backup server, so that the backup server backs up the difference data to the backup storage device. The backup server further backs up the valid data to the backup storage device, and the multi-level data backup makes the backup performance perfect. Even if the application server and the backup server are faulty, the difference data or the difference data bitmap can be extracted from the backup storage device, and the recovery can be resumed. The failure of the application server improves the quality of the backup.

The data backup method provided in this embodiment is an implementation of the incremental backup policy. After the primary storage device receives the backup indication that the backup server sends the triggering backup policy, the primary storage device queries the difference data bits between the snapshots generated by the primary storage device. The standby data backup is performed by the backup server to the backup storage device. The application server does not participate in the backup process. This prevents the application server from running the client backup software or the disk mirroring software to back up the data and affect the application server's own services. Performance, while realizing the normal operation of the application server, the function of backing up data efficiently, that is, the backup data function and the application server running business software do not interfere with each other.

Specifically, the difference data bitmap between the snapshot of the current backup data and the snapshot of the previous backup data adjacent to the backup data is sent to the backup server by the primary storage device, so that the backup server sends two The difference data bitmap of the snapshot in the next adjacent backup data or the difference data corresponding to the difference data bitmap is sent to the backup storage device, so that the backup storage device only backs up the differentiated data, thereby saving the storage space of the backup storage device, and further Improved backup efficiency.

As an optional implementation manner, the data backup method provided in this embodiment further includes: receiving, by the primary storage device, a second indication sent by the backup server, where the second indication is used to instruct the primary storage device to release the mapping relationship between the backup server and the snapshot ;

The primary storage device releases the mapping relationship between the server and the snapshot.

As an optional implementation manner, the data backup method provided in this embodiment further includes: receiving, by the primary storage device, a third indication sent by the backup server, where the third indication is used to indicate deleting the previous backup adjacent to the current backup data. a snapshot of the data;

The primary storage device deletes the snapshot of the previous backup data adjacent to the current backup data.

Referring to FIG. 5, FIG. 5 is a flowchart of a data backup method according to Embodiment 4 of the present application. The data backup method provided in this embodiment is described by the backup server in the case of an incremental backup. As shown in FIG. 5, the data backup method provided in this embodiment includes:

S511. The backup server sends a backup indication to the primary storage device at intervals according to the preset time, so that the primary storage device generates a snapshot according to the backup indication, the primary storage device generates a snapshot, and sends the snapshot identifier of the snapshot to the backup server. The preset time is the interval between the backup data and the previous backup data adjacent to the backup data. The snapshot of the current backup data and the snapshot of the previous backup data adjacent to the current backup data are generated by the primary storage device according to a preset time interval.

S512. The backup server receives the snapshot identifier of the snapshot sent by the primary storage device.

5513. The backup server sends a first indication to the primary storage device, so that the primary storage device establishes a mapping relationship between the snapshot and the backup server according to the first indication.

5514. The backup server mounts the snapshot according to the mapping relationship. S515. The backup server sends the query of the difference data bitmap of the snapshot between the snapshot when the backup data is queried and the previous backup data adjacent to the backup data to the primary storage device, so that the primary storage device queries the current time. The difference data bitmap between the snapshot when the data is backed up and the snapshot when the previous backup data is adjacent to the current backup data.

Optionally, in other embodiments, step S513 and step S514 may be omitted, that is, the backup server does not need to send the first indication to the primary storage device, and the primary storage device does not need to establish a mapping relationship between the snapshot and the backup server. That is, the backup server does not need to mount the snapshot of the data to be backed up during the backup process, and only needs to query the snapshot of the backup data sent by the snapshot identifier of the snapshot sent by the primary storage device adjacent to the current backup data. The signaling of the difference data bitmap between the snapshots when the data was previously backed up is sent to the primary storage device to perform subsequent backup steps.

The primary storage device queries the difference data bitmap between snapshots for incremental backup. The incremental backup strategy is to back up the difference data bitmap or difference data between snapshots. To restore the data under the incremental backup policy, the sum of the data of the previous snapshot corresponding to the location where the difference data is written is the recovery data value.

S516. The difference data bitmap between the snapshot when the backup server receives the current backup data and the snapshot when the previous backup data is adjacent to the backup data.

S517. The backup server backs up the difference data bitmap between the snapshot of the current backup data and the snapshot of the previous backup data adjacent to the backup data to the backup storage device.

S518. The backup server receives the feedback information of the backed up difference data bitmap sent by the backup storage device.

S519. The backup server sends signaling for querying the difference data corresponding to the difference data bitmap to the primary storage device, so that the primary storage device queries the difference data corresponding to the difference data bitmap.

5520. The backup server receives the difference data sent by the primary storage device.

5521. The backup server backs up the difference data to the backup storage device. The backup server further backs up the valid data to the backup storage device, and the multi-level data backup makes the backup performance perfect. Even if the application server and the backup server are faulty, the difference data or the difference data bitmap can be extracted from the backup storage device to restore the application. The failure of the server improves the quality of the backup.

5522. The backup server receives feedback information of the backed up difference data sent by the backup storage device. In the data backup method provided by the embodiment, the backup server sends a backup indication to the primary storage device, so that the primary storage device queries the difference data bitmap between the snapshots generated by the primary storage device and sends the difference data bitmap to the backup server. The server backs up the difference data bitmap to the backup storage device. There is no application server participation in the backup process, which avoids the application server running client backup software or disk mirroring function software to back up data, which affects the application server's own business performance, realizes the normal operation of the application server, and efficiently backs up data. The function, that is, the backup data function and the application server running business software do not interfere with each other.

Specifically, the backup server receives the difference data bitmap between the snapshot when the backup data is queried by the primary storage device and the snapshot of the previous backup data adjacent to the backup data to the backup server, so as to backup the server. The difference data bitmap of the snapshot when the adjacent backup data is sent twice or the difference data corresponding to the difference data bitmap is sent to the backup storage device, so that the backup storage device only backs up the differentiated data, which saves the storage space of the backup storage device. , further improve the backup efficiency.

As an optional implementation manner, the data backup method provided by the embodiment further includes: the backup server sending the second indication to the primary storage device, so that the primary storage device releases the mapping relationship between the backup server and the snapshot according to the second indication.

As an optional implementation manner, the data backup method provided in this embodiment further includes: the backup server sends a third indication to the primary storage device, so that the primary storage device deletes the previous data adjacent to the current backup data according to the third indication. A snapshot of when backing up data at one time.

Referring to FIG. 3a, FIG. 3a is a schematic diagram of a shared storage architecture of a data backup method according to an embodiment of the present application. As shown in FIG. 3a, the device based on the shared storage architecture of the data backup method provided in this embodiment includes: an application server 31 carrying an application operating system, a backup server 32, a primary storage device 33 with a snapshot function, and a backup storage device. 34. The application server 31 carrying the application operating system can perform service processing, and the primary storage device 33 with the snapshot function can generate a snapshot of the operation of the data write by the application server. A communication connection relationship is established between the application server 31 and the primary storage device 33, and the source volume of the primary storage device is mounted by the application server 31 to store data of the application server 31. A backup connection relationship is established between the backup server 32 and the primary storage device 33 to mount the snapshot generated by the primary storage device 33. And a communication connection relationship established between the backup server 32 and the backup storage device 34 to obtain valid data or valid data bitmaps obtained by the backup server 32. Backup to backup storage device 34. When the backup system executes the incremental backup policy, the primary storage device 33 generates a snapshot according to the backup indication that the backup server intermittently sends. Further, the primary storage device 33 sends the snapshot identifier of the snapshot at the current backup to the backup server 32, so that the backup server 32 sends a first indication to the primary storage device 33, and the primary storage device 33 creates a snapshot and backup server 32 according to the first indication. The mapping relationship between the snapshot server 32 is mounted by the backup server 32 to the backup server 32 according to the mapping relationship. The backup server 32 can instruct the primary storage device 33 to compare the snapshots of the two backup data to obtain the difference data bitmap between the two snapshots, so the backup server 32 can be based on the snapshot of the previous backup data and the between the two snapshots. The difference data bitmap obtains the full data bitmap of the changed data block. Or, in the case of a failure, the full amount of data bitmap obtained through the snapshot at the time of the first backup, and the plurality of difference data bitmaps obtained after several backups after the first backup may be restored to the full amount before the fault is generated. Data bitmap. In the backup process, the backup server 32 sends the signaling of the difference data bitmap between the snapshot when the current backup data is queried and the previous backup data adjacent to the current backup data to the primary storage device 33, Obtain the difference data bitmap, realize the incremental backup, and at the same time, the data that needs to be backed up. Further backup server 32 may back up the difference data bitmap to backup storage device 34. The backup storage device 34 can be a general storage medium, and the snapshot function can be used to implement incremental backup in the case of a model mismatch.

Further, the backup server 32 may send, according to the received feedback information of the stored difference data bitmap sent by the backup storage device 34, the primary storage device 33 to send signaling for querying the difference data corresponding to the difference data bitmap, so that the primary The storage device 33 queries the difference data. After the backup server 32 obtains the difference data from the primary storage device 33, it is further backed up to the backup storage device 34. Therefore, the multi-level data backup makes the backup performance perfect. Even if the application server and the backup server are faulty, the difference data or the difference bitmap can be extracted from the backup storage device, and the data can be restored to avoid the business processing failure due to the application server failure. Continuous problems occur, improving the quality of backups.

The process of processing the difference data bitmap under incremental backup is as follows:

3c, 3d, 3e, 3f, and 3g, FIG. 3c is a schematic diagram of data bitmaps corresponding to snapshots obtained during the first backup provided by the embodiment of the present application; FIG. 3d is the first embodiment provided by the embodiment of the present application. A schematic diagram of the difference data bitmap obtained in the second backup; FIG. 3e is the second time provided by the embodiment of the present application FIG. 3f is a schematic diagram of a difference data bitmap obtained in the third backup provided by the embodiment of the present application; FIG. 3g is a full amount of the third backup provided in the embodiment of the present application. A schematic diagram of the data bitmap. Wherein, in each difference data bitmap, the block is a flag bit of the data block, and the flag bit is used to distinguish whether the data block corresponding to the byte bit has changed, and usually uses 0 and 1 to distinguish whether the data block has changed. In the example, for the changed data, the flag bit under the byte bit corresponding to the data block is set to 1. For the data block that has not changed, the block flag corresponding to the corresponding byte bit is set to 1. The value of each flag bit in the initialization data bitmap is 0. For the first snapshot after initialization, as shown in Figure 3c, the flag position of the data block with the bit bit marked 2 is 1, and the bit bit is marked 11 The flag position of the data block is 1. As shown in FIG. 3d, the flag position of the data block whose bit is marked as 2 is 1, indicating that the data block whose bit is marked with 2 has a change, and the flag position of the data block whose bit is marked with 11 indicates that the bit is The data block marked with bit 11 has changed. Because the value of each flag bit in the initialization data bitmap is 0, the data bitmap corresponding to the snapshot obtained during the first backup is the same as the difference data bitmap obtained during the first backup. As shown in FIG. 3e, the flag position of the data block whose bit is marked as 4 is 1, indicating that the data block whose bit is marked as 4 has a change. As shown in FIG. 3f, the flag position of the data block with the bit bit marked 1 is 1, indicating that the data block with the bit bit marked 4 has a change, and the flag position of the data block with the bit bit mark 2 is 1, indicating that the bit is The data block marked with 2 has a change.

According to the data bitmap corresponding to the snapshot obtained during the first backup, the difference data bitmap obtained during the second backup, and the difference data bitmap obtained during the third backup, the data blocks corresponding to the same bit are merged. The flag bit, that is, the flag bit of at least one of the same bit bits in each data bitmap, the flag bit corresponding to the bit position is 1. Then, after the merge, the full data bitmap of the snapshot at the time of the third backup can be obtained, as shown in Fig. 3g.

Optionally, each time the data is backed up, the full data bitmap of the backup data is obtained according to the difference data bitmap obtained by the backup data and the full data bitmap corresponding to the snapshot of the previous backup data, and The backup is performed, and finally the full data bitmap is obtained, so that the full amount of data is obtained according to the full data bitmap and stored in the backup storage device, so that when the data is restored, it is directly obtained from the backup storage device.

Referring to FIG. 6, FIG. 6 is a schematic structural diagram of a storage device according to Embodiment 5 of the present application. The storage device provided in this embodiment is configured to perform the perspective of the primary storage device based on the first embodiment. An execution carrier of the described data backup method, that is, a primary storage device, such as the storage device shown in FIG. 6, includes: a receiving unit 61, a snapshot unit 62, a transmitting unit 63, and a processing unit 64.

The receiving unit 61 is configured to receive a backup indication sent by the backup server, where the backup indication is used to instruct the storage device to generate a snapshot of the source volume.

The snapshot unit 62 is configured to generate a snapshot of the source volume.

The sending unit 63 is configured to send a snapshot identifier of the snapshot to the backup server.

The receiving unit 61 is further configured to receive a signal of a valid data bitmap of the query snapshot sent by the backup server.

The processing unit 64 is configured to query a valid data bitmap of the snapshot according to the signaling of the valid data bitmap of the query snapshot.

The sending unit 63 is further configured to send a valid data bitmap of the snapshot to the backup server, so that the backup server backs up the valid data bitmap of the snapshot to the backup storage device.

The receiving unit 61 is further configured to receive signaling of valid data corresponding to the valid data bitmap of the query snapshot sent by the backup server.

The processing unit 64 is further configured to query the valid data according to the signaling of the valid data corresponding to the valid data bitmap of the query snapshot.

The sending unit 63 is further configured to send valid data to the backup server, so that the backup server backs up the valid data to the backup storage device.

In this embodiment, after the receiving unit 61 receives the backup instruction sent by the backup server, the snapshot unit 62 generates a snapshot of the source volume for full backup. Sending the snapshot identifier of the snapshot to the backup server by the sending unit 63, so that the processing unit 64 of the primary storage device further informs the backup server to query the valid data bitmap of the snapshot, and the backup server receives the valid data bitmap sent by the sending unit 63. In order to back up the valid data bitmap to the backup storage device. And, by the processing unit 64, according to the signaling valid data corresponding to the valid data bitmap of the valid data bitmap of the query snapshot received by the receiving unit 61, the sending unit 63 sends the valid data to the backup server, so that the backup server is valid. Data to the backup storage device. By performing a full backup policy, the valid data of the source volume is backed up, the backup data is reduced, and the application server is not required to additionally run the client software for backup. Only the backup server and the primary storage device establish communication, and obtain valid data bits. Figure, through the backup processing between the backup server and the backup storage device, complete the full backup of the data. As an optional implementation manner, the storage device further includes:

Create a cell that is used to create the source volume.

A mapping unit, configured to map the source volume to the application server, so that the application server mounts the source volume to store the data of the application server to the source volume.

As an optional implementation manner, the receiving unit is further configured to receive the first indication. The first indication is used to instruct the primary storage device to establish a mapping relationship between the snapshot and the backup server.

The processing unit is further configured to establish a mapping relationship between the snapshot and the backup server according to the first indication, so that the backup server mounts the snapshot.

As an optional implementation manner, the receiving unit is further configured to receive a second indication sent by the backup server, where the second indication is used to instruct the primary storage device to release the mapping relationship between the backup server and the snapshot; the processing unit is further configured to release The mapping between the backup server and the snapshot.

As an optional implementation manner, the receiving unit is further configured to receive a third indication sent by the backup server, where the third indication is used to instruct the primary storage device to delete the snapshot of the source volume;

The processing unit is also used to delete the snapshot of the source volume.

Referring to FIG. 7, FIG. 7 is a schematic structural diagram of another storage device according to Embodiment 5 of the present application. As shown in FIG. 7, the storage device provided in this embodiment is an execution carrier of the data backup method described in the perspective of the primary storage device according to the first embodiment, and includes: an input device 71, an output device 72, and a memory 73. And a processor 74, wherein the memory 73 stores a set of program codes, and the processor 74 is configured to call the program code stored in the memory, to perform the following operations:

Receive backup instructions sent by the backup server. The backup indication is used to instruct the primary storage device to generate a snapshot of the source volume.

Generate a snapshot of the source volume.

Send the snapshot ID of the snapshot to the backup server;

Receiving signaling of a valid data bitmap of a query snapshot sent by the backup server.

A valid data bitmap of the snapshot is queried according to the signaling of the valid data bitmap of the query snapshot.

Send a valid data bitmap of the snapshot to the backup server so that the backup server backs up the valid data bitmap of the snapshot to the backup storage device. Wherein, the valid data bitmap is obtained by the backup server, and the backup server can restore the valid data in the application server according to the valid data in the valid data bitmap. It is not necessary to back up invalid data, which reduces the amount of data backed up and improves the backup rate. Receiving signaling of valid data corresponding to the valid data bitmap of the query snapshot sent by the backup server. The valid data is queried according to the signaling of the valid data corresponding to the valid data bitmap of the query snapshot.

Send valid data to the backup server so that the backup server backs up valid data to the backup storage device.

In this embodiment, the processor 74 of the primary storage device controls the output device to send the valid data bitmap of the snapshot of the source volume to the backup server, so that the backup server sends the valid data bitmap to the backup storage device, so that the backup storage device can enable the backup storage device. Back up the valid bitmap so that the backup system can obtain valid data further, so that the backup data cannot be backed up without backing up the invalid data.

As an optional implementation manner, before the processor performs an operation of generating a snapshot of the source volume, the processor further performs the following steps:

Create a source volume;

Map the source volume to the application server so that the application server mounts the source volume to store the application server's data to the source volume.

As an optional implementation manner, after the step of performing the step of sending the snapshot identifier of the snapshot to the backup server, and performing the step of receiving the signaling of the valid data bitmap of the query snapshot sent by the backup server, the processor is further configured to perform The following steps:

Receiving a first indication sent by the backup server, where the first indication is used to instruct the primary storage device to establish a mapping relationship between the snapshot and the backup server;

According to the first indication, a mapping relationship between the snapshot and the backup server is established, so that the backup server mounts the snapshot.

As an optional implementation manner, the processor is further configured to perform the following steps:

Receiving a second indication sent by the backup server. The second indication is used to instruct the primary storage device to release the mapping relationship between the backup server and the snapshot.

Unmap the backup server from the snapshot.

Receive a third indication sent by the backup server. The third indication is used to instruct the primary storage device to delete the snapshot of the source volume.

Delete a snapshot of the source volume. Referring to FIG. 8, FIG. 8 is a schematic structural diagram of a server according to Embodiment 6 of the present application. The server provided in this embodiment is an execution carrier of a data backup method according to the second embodiment, that is, a backup server. The backup server shown in FIG. 8 includes: a sending unit 81, a receiving unit 82, and a backup unit 83.

The sending unit 81 is configured to send a backup indication to the primary storage device, to indicate that the primary storage device generates a snapshot of the source volume, and the primary storage device sends the snapshot identifier of the snapshot to the backup server.

The receiving unit 82 is configured to receive a snapshot identifier sent by the primary storage device.

The sending unit 81 is further configured to send signaling of the valid data bitmap of the query snapshot to the primary storage device, so that the primary storage device queries the valid data bitmap of the snapshot according to the signaling of the valid data bitmap of the query snapshot;

The receiving unit 82 is further configured to receive a valid data bitmap of the snapshot sent by the primary storage device, and a backup unit 83, configured to back up the valid data bitmap of the snapshot to the backup storage device;

The receiving unit 82 is further configured to receive feedback information of a valid data bitmap of the backup snapshot sent by the backup storage device;

The sending unit 81 is further configured to send, according to the feedback information of the valid data bitmap of the backed up snapshot, signaling of the valid data corresponding to the valid data bitmap of the snapshot to the primary storage device, so that the primary storage device obtains valid data according to the snapshot. Signaling query valid data of valid data corresponding to the bitmap;

The receiving unit 82 is further configured to receive valid data sent by the primary storage device;

The backup unit 83 is also used to back up valid data to the backup storage device.

The receiving unit 82 is further configured to receive feedback information of valid data of the backup snapshot sent by the backup storage device.

The server provided in this embodiment is a backup server that backs up data, and sends a backup indication to the primary storage device by the sending unit 81 to instruct the primary storage device to generate a snapshot of the source volume, and the primary storage device sends the snapshot identifier of the snapshot, and the receiving unit Receiving a snapshot identifier of the snapshot of the source volume sent by the primary storage device, and sending, by the sending unit 81, the signaling of the valid data bitmap of the query snapshot to the primary storage device, so that the primary storage device according to the valid data bitmap of the query snapshot The valid data bitmap of the snapshot is queried for receiving the valid data bitmap by the receiving unit 82, and then the backup data unit is backed up by the backup unit 83 to the backup storage device. At the same time that the full backup has been reached, there is no need to back up invalid data, and the data is backed up. And further back up valid data through the backup unit The bitmap to the backup storage device implements multi-level data backup, improves the performance of data backup, and is fully prepared for better recovery of the application server during normal operation.

As an optional implementation manner, the sending unit is further configured to send the first indication to the primary storage device, so that the primary storage device establishes a mapping relationship between the snapshot and the backup server according to the first indication.

The server further includes: a processing unit, configured to mount the snapshot according to the mapping relationship acquired by the receiving unit. As an optional implementation manner, the sending unit is further configured to send the second indication to the primary storage device, so that the primary storage device releases the mapping relationship between the backup server and the snapshot.

As an optional implementation manner, the sending unit is further configured to send a third indication to the primary storage device, so that the primary storage device deletes the snapshot of the source volume.

Referring to FIG. 9, FIG. 9 is a schematic structural diagram of another server provided in Embodiment 6 of the present application. The server provided in this embodiment is an execution carrier of a data backup method according to the second embodiment, that is, a backup server. The backup server shown in FIG. 9 includes: an input device 91, an output device 92, a memory 93, and The processor 94 is configured to store a set of program codes in the memory 93, and the processor 94 is configured to call the program code stored in the memory to perform the following operations:

Sending a backup indication to the primary storage device to instruct the primary storage device to generate a snapshot of the source volume, and the primary storage device sends the snapshot identifier of the snapshot to the backup server.

Receive the snapshot ID sent by the primary storage device.

The signaling of the valid data bitmap of the query snapshot is sent to the primary storage device, so that the primary storage device queries the valid data bitmap of the snapshot according to the signaling of the valid data bitmap of the query snapshot.

Receives a valid data bitmap of the snapshot sent by the primary storage device.

Back up the valid data bitmap of the snapshot to the backup storage device.

Receive feedback information about the valid data bitmap of the backed up snapshot sent by the backup storage device.

And sending, according to the feedback information of the valid data bitmap of the backed up snapshot, signaling of the valid data corresponding to the valid data bitmap of the query snapshot to the primary storage device, so that the primary storage device according to the valid data bitmap corresponding to the valid data bitmap of the query snapshot Signaling queries for valid data.

Receive valid data sent by the primary storage device.

Back up valid data to the storage device. In this embodiment, the processor 94 performs a related operation to send a backup indication to the primary storage device, to instruct the primary storage device to generate a snapshot of the source volume, receive the snapshot identifier of the snapshot of the source volume sent by the primary storage device, and send the query snapshot valid. The signaling of the data bitmap is sent to the primary storage device to receive a valid data bitmap of the snapshot queried and sent by the primary storage device, so as to back up the valid data bitmap of the snapshot to the backup storage device. By controlling the backup processing communication relationship between the backup server and the primary storage device, the valid data bitmap of the source volume is obtained, and the backup can be completed without loading and running the client software with the backup function on the application server. And to achieve full backup, specifically to obtain a valid data bitmap, the fine data backup of the invalid data, improve the backup rate. Further, the backup data storage device obtains the valid data bitmap in the backup server, realizes multi-level data backup, improves the performance of the data backup, and fully satisfies the write data operation of the application server during normal operation. ready.

As an optional implementation manner, after the step of receiving the snapshot identifier sent by the primary storage device, and performing the signaling of sending the valid data bitmap of the query snapshot to the primary storage device, the processor is further configured to perform The following operations:

And sending a first indication to the primary storage device, so that the primary storage device establishes a mapping relationship between the snapshot and the backup server according to the first indication.

Mount the snapshot based on the mapping between the snapshot and the backup server.

As an optional implementation manner, the processor is further configured to perform the following operations:

Sending a second indication to the primary storage device, so that the primary storage device releases the mapping relationship between the backup server and the snapshot.

Send a third indication to the primary storage device to cause the primary storage device to delete the snapshot of the source volume.

Referring to FIG. 10, FIG. 10 is a schematic structural diagram of a storage device according to Embodiment 7 of the present application. As shown in FIG. 10, the storage device provided in this embodiment is an execution carrier that performs a data backup method according to the third embodiment, and is a primary storage device, including: a receiving unit 101, a snapshot unit 102, a sending unit 103, and Processing unit 104.

The receiving unit 101 is configured to receive a backup indication that is sent by the backup server according to a preset time interval, and the backup indication is used to instruct the storage device to generate a snapshot. The preset time is the interval between the backup data and the previous backup data adjacent to the backup data.

The snapshot unit 102 is configured to generate a snapshot according to the backup indication. The sending unit 103 is configured to send a snapshot identifier of the snapshot to the backup server.

The receiving unit 101 is further configured to receive signaling of a difference data bitmap between the snapshots when the current backup data is queried by the backup server and the previous backup data adjacent to the backup data.

The processing unit 104 is configured to query the snapshot and the current backup data according to the signaling of the difference data bitmap between the snapshot when the backup data is queried and the previous backup data adjacent to the current backup data. The difference data bitmap between snapshots when the backup data is adjacent to the previous backup data.

The sending unit 103 is further configured to send the difference data bitmap between the snapshots of the current backup data and the previous backup data adjacent to the current backup data to the backup server, so that the backup server backs up the current backup data. The snapshot is the difference data bitmap between the snapshots of the previous backup data adjacent to this backup data to the backup storage device.

The receiving unit 101 is further configured to receive signaling of the difference data corresponding to the query difference data bitmap sent by the backup server.

The processing unit 104 is further configured to query the difference data according to the signaling of the difference data corresponding to the query difference data bitmap.

The sending unit 103 is further configured to send the difference data to the backup server, so that the backup server backs up the difference data to the backup storage device.

The storage device provided in this embodiment is a primary storage device. In the backup process, the snapshot server 102 generates a snapshot according to the preset time interval of the backup server received by the receiving unit 101 according to the preset time interval, so as to send the unit. The snapshot identifier of the snapshot is sent to the backup server, and the processing unit 104 receives, according to the receiving unit 101, a snapshot between the snapshot when the current backup data is sent by the backup server and the previous backup data adjacent to the current backup data. Signaling of the difference data bitmap, querying the difference data bitmap between the snapshot when the backup data is synchronized with the previous backup data adjacent to the backup data, after querying the difference data bitmap, passing the sending unit 103. The difference data bitmap between the snapshot when the backup data is sent and the previous backup data adjacent to the backup data is sent to the backup server, so that the backup server backs up the backup data and the current backup. Data difference bitmap between snapshots when the data was previously stored last time to backup storage Equipment. During the backup process, an incremental backup policy is executed. After the incremental backup policy is triggered, a communication link with snapshot communication function is established between the backup server and the storage device, and the application server does not need to be loaded and run with backup function. The client software can complete the backup. Therefore, it will not affect the application service. The normal operation of the server ensures the normal processing of the application server and completes the data backup online. By obtaining the difference data bitmap between the snapshots of the backup data and the previous backup data adjacent to the backup data, the data can be further refined and the backup storage space is reduced, which is no longer limited to adoption. The backup strategy of full backup backs up data.

As an optional implementation manner, the receiving unit is further configured to receive the first indication sent by the backup server. The first indication is used to instruct the primary storage device to establish a mapping relationship between the snapshot and the backup server.

As an optional implementation manner, the receiving unit is further configured to receive a third indication sent by the backup server, where the third indication is used to indicate to delete a snapshot when the previous backup data is adjacent to the current backup data; It is also used to delete a snapshot of the previous backup data adjacent to this backup data. Referring to FIG. 11, FIG. 11 is a schematic structural diagram of another storage device according to Embodiment 7 of the present application. As shown in FIG. 11, the storage device provided in this embodiment is an execution carrier that executes a data backup method according to Embodiment 3, and is a primary storage device, including: an input device 111, an output device 112, a memory 113, and a processor. 114, wherein a set of program codes is stored in the memory 113, and the processor 114 is configured to call the program code stored in the memory, to perform the following operations:

Receiving, by the backup server, a backup indication that is sent intermittently according to a preset time, and the backup indication is used to instruct the primary storage device to generate a snapshot, and the preset time is a time interval between the backup data and the previous backup data adjacent to the current backup data;

Generate a snapshot according to the backup instructions;

Send the snapshot ID of the snapshot to the backup server;

Receiving the signaling of the difference data bitmap between the snapshots of the previous backup data adjacent to the previous backup data sent by the backup server;

According to the signaling of the difference data bitmap of the snapshot when the snapshot of the current backup data is compared with the previous backup data adjacent to the current backup data, the snapshot of the current backup data and the snapshot adjacent to the current backup data are queried. The difference data bitmap between snapshots when the data was previously backed up; The difference data bitmap between the snapshot when the backup data is sent and the previous backup data adjacent to the backup data is sent to the backup server, so that the backup server backs up the backup data and the current backup data. The difference data bitmap between the snapshots of the previous previous backup data to the backup storage device;

Receiving signaling of the difference data corresponding to the query difference data bitmap sent by the backup server; and querying the difference data according to the signaling of the difference data corresponding to the query difference data bitmap;

Send the difference data to the backup server so that the backup server backs up the difference data to the backup storage device.

The storage device provided in this embodiment is a primary storage device, and the related operations are performed by the processor 114 to control the storage device to generate a snapshot according to the interval indication obtained by the interval, and receive the query for the current backup data sent by the backup server. After the snapshot of the difference data bitmap between the snapshots of the previous backup data adjacent to the current backup data, the snapshot of the current backup data and the previous backup data adjacent to the current backup data are queried. The difference data bitmap between the snapshots, and sending the difference data bitmap to the backup server, so that the backup server backs up the difference data bitmap to the backup storage device. During the backup process, an incremental backup policy is executed. After the incremental backup policy is triggered, a communication link with snapshot communication function is established between the backup server and the storage device, and the application server does not need to be loaded and run with backup function. The client software can complete the backup. Therefore, the normal operation of the application server is not affected, the normal processing service of the application server is ensured, and the data backup is completed online at the same time. By obtaining the difference data bitmap between the snapshots of the backup data and the previous backup data adjacent to the backup data, the data can be further refined and the backup storage space is reduced, which is no longer limited to adoption. The backup strategy of full backup backs up data.

As an optional implementation manner, the processor performs the step of sending the snapshot identifier of the snapshot to the backup server, and performs the process of receiving the snapshot sent by the backup server to query the current backup data and the previous time adjacent to the current backup data. The processor is also used to perform the following operations before the step of signaling the data bitmap of the difference between snapshots when backing up data:

According to the first indication, a mapping relationship between the snapshot and the backup server is established, so that the backup server mounts the snapshot. As an optional implementation, the processor is further configured to: receive a second indication sent by the backup server, where the second indication is used to instruct the primary storage device to release the mapping relationship between the backup server and the snapshot;

Unmap the backup server from the snapshot.

Receiving a third indication sent by the backup server, where the third indication is used to indicate that the snapshot of the previous backup data adjacent to the current backup data is deleted;

Delete the snapshot of the previous backup data adjacent to this backup data.

Referring to FIG. 12, FIG. 12 is a schematic structural diagram of a server according to Embodiment 8 of the present application. As shown in FIG. 12, the server provided in this embodiment is an execution carrier for performing a data backup method according to the fourth embodiment. The backup server includes a sending unit 121, a receiving unit 122, and a backup unit 123.

The sending unit 121 is configured to send a backup indication to the primary storage device at intervals according to the preset time, so that the primary storage device generates a snapshot according to the backup indication, the primary storage device generates a snapshot, and sends the snapshot identifier of the snapshot to the backup server. . The preset time is the interval between the backup data and the previous backup data adjacent to the backup data.

The receiving unit 122 is configured to receive a snapshot identifier of the snapshot sent by the primary storage device.

The sending unit 121 is further configured to send, by the primary storage device, the signaling of the difference data bitmap between the snapshots when the snapshot of the current backup data and the previous backup data adjacent to the backup data are forwarded to the primary storage device. Query the difference data bitmap between the snapshot at the time of the backup data and the snapshot at the time of the previous backup data adjacent to the backup data.

The receiving unit 122 is further configured to receive a difference data bitmap between the snapshot at the time of the backup data and the snapshot at the time of the previous backup data adjacent to the current backup data.

The backup unit 123 is configured to back up the difference data bitmap between the snapshot when the backup data is used and the previous backup data adjacent to the backup data to the backup storage device.

The receiving unit 122 is further configured to receive feedback information of the backed up difference data bitmap sent by the backup storage device.

The sending unit 121 is further configured to send signaling for querying the difference data corresponding to the difference data bitmap to the primary storage device, so that the primary storage device queries the difference data corresponding to the difference data bitmap. The receiving unit 122 is further configured to receive difference data sent by the primary storage device.

The backup unit 123 is also used to back up the difference data to the backup storage device.

The receiving unit 122 is further configured to receive a feedback message of the backup difference data sent by the backup storage device, where the snapshot of the current backup data and the snapshot of the previous backup data adjacent to the current backup data are performed by the primary storage device. According to the backup instructions, the preset time is the interval between the backup data and the previous backup data adjacent to the backup data.

The server provided in this embodiment is a backup server, and the backup unit sends the backup indication to the primary storage device at intervals according to the preset time, so that the primary storage device generates a snapshot according to the backup indication, and the primary storage device generates a snapshot, and The snapshot identifier of the snapshot is sent to the backup server, and the snapshot identifier of the snapshot sent by the primary storage device is received by the receiving unit 122, so that the snapshot of the current backup data is sent by the sending unit 121 to the previous backup data adjacent to the current backup data. The signaling of the difference data bitmap between the snapshots to the primary storage device, so that the primary storage device queries the difference between the snapshot of the current backup data and the snapshot of the previous backup data adjacent to the current backup data. The bitmap is received by the receiving unit 122, and the difference data bitmap sent by the primary storage device is backed up by the backup unit 123 to the backup storage device. During the backup process, an incremental backup policy is executed. After the incremental backup policy is triggered, a communication link with snapshot communication function is established between the backup server and the storage device, and the application server does not need to be loaded and run with backup function. The client software can complete the backup. Therefore, the normal operation of the application server is not affected, the normal processing service of the application server is ensured, and the data backup is completed online. By obtaining the difference data bitmap between the snapshots of the backup data and the previous backup data adjacent to the backup data, the data can be further refined and the backup storage space is reduced, which is no longer limited to adoption. The backup strategy of full backup backs up data.

The processing unit is configured to mount the snapshot according to the obtained mapping relationship.

As an optional implementation manner, the sending unit is further configured to send the second indication to the primary storage device, so that the primary storage device releases the mapping relationship between the backup server and the snapshot according to the second indication.

As an optional implementation manner, the sending unit is further configured to send the third indication to the primary storage device, The snapshot of the previous backup data adjacent to the current backup data is deleted by the primary storage device according to the third indication.

Referring to FIG. 13, FIG. 13 is a schematic structural diagram of another server according to Embodiment 8 of the present application. As shown in FIG. 13, the server provided in this embodiment is an execution carrier that executes a data backup method according to Embodiment 4, and is a backup server, including: an input device 131, an output device 132, a memory 133, and a processor. 134, wherein a set of program codes is stored in the memory 133, and the processor 134 is configured to call the program code stored in the memory 133 for performing the following operations:

The backup instruction is sent to the primary storage device at intervals according to the preset time, so that the primary storage device generates a snapshot according to the backup indication, the primary storage device generates a snapshot, and the snapshot identifier of the snapshot is sent to the backup server. The preset time is the interval between the backup data and the previous backup data adjacent to the backup data.

Receives the snapshot ID of the snapshot sent by the primary storage device.

The signaling of the difference data bitmap between the snapshots when the backup data is queried and the previous backup data adjacent to the current backup data is sent to the primary storage device, so that the primary storage device queries the current backup data. The difference data bitmap between the snapshot and the snapshot when the previous backup data is adjacent to this backup data.

The difference data bitmap between the snapshot when the backup data is received and the snapshot when the previous backup data is adjacent to the backup data.

The difference data bitmap between the snapshot when the backup data is backed up and the previous backup data adjacent to the backup data is backed up to the backup storage device.

Receive feedback information of the backed up difference data bitmap sent by the backup storage device.

Sending signaling of the difference data corresponding to the query difference data bitmap to the primary storage device, so that the primary storage device queries the difference data corresponding to the difference data bitmap.

Receive differential data sent by the primary storage device.

Back up the difference data to the backup storage device.

Receive feedback information about the backed up differential data sent by the backup storage device.

The snapshot of the backup data and the snapshot of the previous backup data adjacent to the backup data are generated by the primary storage device according to the backup indication, and the backup indication is sent by the backup server at intervals. The preset time is The time when the backup data is adjacent to the previous backup data Interval.

The server provided in this embodiment is a backup server, and the related operations are performed by the processor 134 to send a backup indication to the primary storage device at intervals according to a preset time, so that the primary storage device generates a snapshot according to the backup indication, and the primary storage device generates the snapshot. The device generates a snapshot, and sends the snapshot ID of the snapshot to the backup server, and then sends a signaling to the main data of the difference data bitmap between the snapshot when the backup data is queried and the previous backup data adjacent to the backup data. The storage device is configured to enable the primary storage device to query the difference data bitmap between the snapshot when the backup data is synchronized and the previous backup data adjacent to the backup data, and receive the difference data bitmap sent by the primary storage device. , back up the difference data bitmap to the backup storage device. During the backup process, an incremental backup policy is executed. After the incremental backup policy is triggered, a communication link with snapshot communication function is established between the backup server and the storage device, and the application server does not need to be loaded and run with backup function. The client software can complete the backup. Therefore, the normal operation of the application server is not affected, the normal processing service of the application server is ensured, and the data backup is completed online. By obtaining the difference data bitmap between the snapshots of the backup data and the previous backup data adjacent to the backup data, the data can be further refined and the backup storage space is reduced, which is no longer limited to adoption. The backup strategy of full backup backs up data.

As an optional implementation manner, the processor performs the step of receiving the snapshot identifier of the snapshot sent by the primary storage device, and performing the snapshot of the current backup data and the previous backup data adjacent to the current backup data. Before the step of signaling the difference data bitmap between the snapshots to the primary storage device, the processor is also used to perform the following operations:

Sending a first indication to the primary storage device, so that the primary storage device establishes a mapping relationship between the snapshot and the backup server according to the first indication;

Mount the snapshot based on the mapping relationship.

Sending a second indication to the primary storage device, so that the primary storage device releases the mapping relationship between the backup server and the snapshot according to the second indication.

Sending a third indication to the primary storage device, so that the primary storage device deletes the snapshot of the previous backup data adjacent to the current backup data according to the third indication.

Referring to FIG. 14, FIG. 14 is a schematic structural diagram of a data backup system according to Embodiment 9 of the present application. Figure. As shown in FIG. 14, the data backup system provided in this embodiment includes a primary storage device provided in Embodiment 5 and a backup server provided in Embodiment 6, and includes an application server, and further includes: a backup storage device 141. A valid data bitmap for storing a snapshot of the source volume sent by the backup server.

The backup storage device 141 is further configured to send feedback information of the valid data bitmap of the backed up snapshot to the backup server;

The backup storage device 141 is further configured to store valid data corresponding to the valid data bitmap sent by the backup server.

The backup storage device 141 is further configured to send feedback information of valid data of the stored snapshot to the backup server.

The data backup system provided in this embodiment sends a valid data bitmap of the snapshot of the source volume to the backup server through the primary storage device, so that the backup server sends a valid data bitmap or further sends valid data corresponding to the valid data bitmap. The backup storage device enables the backup storage device to back up valid data, so that the backup data cannot be backed up without backing up invalid data. Secondly, during the backup process, a full backup policy is executed. After the full backup policy is triggered, a communication link with a snapshot communication function is established between the backup server and the storage device, and the application server does not need to be loaded and run with a backup function. The client software can complete the backup. Therefore, the normal operation of the application server is not affected, the normal processing service of the application server is ensured, and the data backup is completed online. By obtaining a valid data bitmap, the data can be further backed up and the backup storage space is reduced.

Referring to FIG. 15, FIG. 15 is a schematic structural diagram of a data backup system according to Embodiment 10 of the present application. As shown in FIG. 15, the data backup system provided in this embodiment includes a primary storage device provided in the seventh embodiment and a backup server provided in the eighth embodiment, and further includes:

The backup storage device 151 is used to store a difference data bitmap between the snapshot at the time of the backup data and the snapshot at the time of the previous backup data adjacent to the backup data.

The backup storage device 151 is further configured to send feedback information of the backed up difference data bitmap to the backup server.

The backup storage device 151 is further configured to store the difference data corresponding to the difference data bitmap to the backup storage device.

The backup storage device 151 is further configured to send feedback information of the stored difference data to the backup server. In the data backup system provided by the embodiment, the difference data bitmap between the snapshot of the current backup data and the snapshot of the previous backup data adjacent to the backup data is sent to the backup server by the primary storage device. For the backup server to send the differential data bitmap of the snapshot when the backup data is sent twice or the difference data corresponding to the difference data bitmap to the backup storage device, so that the backup storage device only backs up the differentiated data. During the backup process, an incremental backup policy is executed. After the incremental backup policy is triggered, a communication link with snapshot communication function is established between the backup server and the storage device, and the application server does not need to be loaded and run with backup function. The client software can complete the backup. Therefore, the normal operation of the application server is not affected, the normal processing service of the application server is ensured, and the data backup is completed online. By obtaining the difference data bitmap between the snapshots of the backup data and the previous backup data adjacent to the backup data, the data can be further refined and the backup storage space is reduced, which is no longer limited to adoption. The backup strategy of full backup backs up data.

In summary, the data backup method and related devices provided in this embodiment are configured by using a backup technology in the backup server, so that the backup server receives the signaling that triggers the backup policy, and then processes the snapshot with the primary storage device. The backup data is sent to the backup storage device. There is no application server participation during the backup process, which avoids the application server running the client backup software or the disk mirror function software to back up the data and affect the application server's own business performance, and implements the application server. At the same time of normal operation, the function of efficiently backing up data, that is, the backup data function and the application server running business software do not interfere with each other.

Specifically, the valid data bitmap of the snapshot of the source volume that is queried is sent to the backup server by the primary storage device, so that the backup server sends a valid data bitmap or further sends valid data corresponding to the valid data bitmap to the backup storage device, so that the backup storage is performed. The device can back up valid data, so there is no need to back up invalid data, and the data is backed up.

Or, the difference data bitmap between the snapshot of the current backup data and the snapshot of the previous backup data adjacent to the backup data is sent to the backup server by the primary storage device, so that the backup server sends the backup server twice. The difference data bitmap of the snapshot when the data is backed up or the difference data corresponding to the difference data bitmap is sent to the backup storage device, so that the backup storage device only backs up the differentiated data, which saves the storage space of the backup storage device and further improves Backup efficiency.

Full backup or incremental backup makes the backup scheme more selective and has no impact on the performance of the application server, and the valid data, valid bitmap or difference number is passed through the backup server. According to the difference data bitmap stored in the file, the model different from the main storage can be used, that is, the heterogeneous storage is supported, and the universal applicability of each device in the backup system is enhanced.

In the several embodiments provided herein, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or modules may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device, module or unit, or an electrical, mechanical or other form of connection.

The modules or units described as separate components may or may not be physically separate. The components displayed as modules or units may or may not be physical modules or units, ie may be located in one place, or may be distributed to multiple On a network module or unit. Some or all of the modules or units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.

In addition, each functional module or unit in each embodiment of the present invention may be integrated into one processing module or unit, or each module or unit may exist physically separately, or two or more modules or units may be integrated in In a module or unit. The above integrated modules or units can be implemented either in the form of hardware or in the form of software functional units.

An integrated module or unit, if implemented as a software function module or unit and sold or used as a stand-alone product, can be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the various embodiments of the present invention. The foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any equivalent modification or can be easily conceived by those skilled in the art within the technical scope of the present disclosure. Such modifications or substitutions are intended to be included within the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Rights request

1. A data backup method, characterized by including:

The primary storage device receives a backup instruction sent by the backup server, where the backup instruction is used to instruct the primary storage device to generate a snapshot of the source volume;

The primary storage device generates a snapshot of the source volume;

The primary storage device sends the snapshot identification of the snapshot to the backup server;

The primary storage device receives the signaling sent by the backup server to query the valid data bitmap of the snapshot;

The main storage device queries the valid data bitmap of the snapshot according to the signaling for querying the valid data bitmap of the snapshot;

The primary storage device sends the valid data bitmap of the snapshot to the backup server, so that the backup server backs up the valid data bitmap of the snapshot to the backup storage device;

The primary storage device receives the signaling sent by the backup server to query the valid data corresponding to the valid data bitmap of the snapshot;

The main storage device queries the valid data according to the signaling of querying the valid data corresponding to the valid data bitmap of the snapshot;

The main storage device sends the valid data to the backup server, so that the backup server backs up the valid data to the backup storage device.

2. The data backup method according to claim 1, characterized in that, before the primary storage device generates a snapshot of the source volume, the method further includes:

The primary storage device creates the source volume;

The main storage device maps the source volume to the application server, so that the application server mounts the source volume to store data of the application server in the source volume.

3. The data backup method according to claim 1, characterized in that, after the main storage device sends the snapshot identification of the snapshot to the backup server, and the main storage device receives the query sent by the backup server. Before signaling the valid data bitmap of the snapshot, the method further includes: the primary storage device receiving a first indication sent by the backup server, the first indication being used to instruct the primary storage device to establish the The mapping relationship between the snapshot and the backup server; The primary storage device establishes a mapping relationship between the snapshot and the backup server according to the first instruction, so that the backup server mounts the snapshot.

4. The data backup method according to claim 3, wherein the method further includes: the primary storage device receiving a second instruction sent by the backup server, the second instruction being used to instruct the primary storage device. The storage device releases the mapping relationship between the backup server and the snapshot;

5. The data backup method according to any one of claims 1 to 4, characterized in that the method further includes:

The primary storage device receives a third instruction sent by the backup server, where the third instruction is used to instruct the primary storage device to delete the snapshot of the source volume;

The primary storage device deletes the snapshot of the source volume.

6. A data backup method, characterized by including:

The backup server sends a backup instruction to the primary storage device to instruct the primary storage device to generate a snapshot of the source volume, and the primary storage device sends a snapshot identification of the snapshot to the backup server;

The backup server receives the snapshot identification sent by the primary storage device;

The backup server sends a signaling to query the valid data bitmap of the snapshot to the primary storage device, so that the primary storage device queries the snapshot according to the signaling to query the valid data bitmap of the snapshot. The valid data bitmap;

The backup server receives the valid data bitmap of the snapshot sent by the primary storage device; the backup server distributes the valid data bitmap of the snapshot to the backup storage device; the backup server receives the backup storage device Send feedback information that the valid data bitmap of the snapshot has been backed up;

The backup server sends signaling for querying the valid data corresponding to the valid data bitmap of the snapshot to the main storage device according to the feedback information of the valid data bitmap of the snapshot that has been backed up, so that The main storage device queries the valid data according to the signaling of querying the valid data corresponding to the valid data bitmap of the snapshot;

The backup server receives the valid data sent by the primary storage device;

The backup server distributes the valid data to the backup storage device;

The backup server receives the feedback information sent by the backup storage device that the valid data of the snapshot has been backed up.

7. The data backup method according to claim 6, wherein after the backup server receives the snapshot identification sent by the primary storage device, the backup server sends a message querying the valid data bitmap of the snapshot. Before the command is given to the main storage device, the method further includes:

The backup server sends a first instruction to the primary storage device, so that the primary storage device establishes a mapping relationship between the snapshot and the backup server according to the first instruction;

The backup server mounts the snapshot according to the mapping relationship between the snapshot and the backup server.

8. The data backup method of claim 7, wherein the method further includes: the backup server sending a second instruction to the main storage device, so that the main storage device deactivates the backup server. and the mapping relationship between the snapshots.

9. The data backup method according to any one of claims 6 to 8, characterized in that the method further includes:

The backup server sends a third instruction to the primary storage device, so that the primary storage device deletes the snapshot of the source volume.

10. A data backup method, characterized by including:

The main storage device receives backup instructions sent by the backup server at intervals according to a preset time. The backup instructions are used to instruct the main storage device to generate snapshots. The preset time is when the current backup data is adjacent to the current backup data. The time interval of the previous backup data;

The primary storage device generates a snapshot according to the backup instruction;

The main storage device receives the signaling sent by the backup server to query the difference data bitmap between the snapshot of the current backup data and the snapshot of the previous backup data adjacent to the current backup data; The signaling of the difference data bitmap between the adjacent snapshots of the previous backup data is queried between the snapshot of the current backup data and the snapshot of the previous backup data adjacent to the current backup data. Difference data bitmap; Send the difference data bitmap between the snapshots of the previous data backup to the backup server, so that the backup server can back up the snapshots of the current backup data and the current backup data. adjacent previous The difference data bitmap between the snapshots when backing up data to the backup storage device;

The primary storage device receives the signaling sent by the backup server to query the differential data corresponding to the differential data bitmap;

The main storage device queries the difference data according to the signaling of querying the difference data corresponding to the difference data bitmap;

The main storage device sends the difference data to the backup server, so that the backup server backs up the difference data to the backup storage device.

11. The data backup method according to claim 10, characterized in that, after the main storage device sends the snapshot identification of the snapshot to the backup server, and the main storage device receives the query sent by the backup server. Before signaling the difference data bitmap between the snapshot of the current backup data and the previous snapshot of the backup data adjacent to the current backup data, the method further includes: the main storage device receives all The first instruction sent by the backup server, the first instruction is used to instruct the primary storage device to establish a mapping relationship between the snapshot and the backup server;

The primary storage device establishes a mapping relationship between the snapshot and the backup server according to the first instruction, so that the backup server mounts the snapshot.

12. The data backup method as claimed in claim 11, wherein the method further includes: the primary storage device receiving a second instruction sent by the backup server, the second instruction being used to instruct the primary storage device. The storage device releases the mapping relationship between the backup server and the snapshot;

13. The data backup method according to any one of claims 10 to 12, characterized in that the method further includes:

The main storage device receives a third instruction sent by the backup server, where the third instruction is used to instruct to delete the snapshot of the previous backup data adjacent to the current backup data;

The main storage device deletes the snapshot of the previous backup data adjacent to the current backup data.

14. A data backup method, characterized by including:

The backup server sends backup instructions to the main storage device at intervals according to the preset time, so that the main storage device generates a snapshot according to the backup instruction, the main storage device generates a snapshot, and sends the snapshot identification of the snapshot to The backup server; The preset time is the time interval between the current backup data and the previous backup data adjacent to the current backup data; The backup server receives the snapshot identifier of the snapshot sent by the primary storage device; the backup server sends the previous backup data of the snapshot adjacent to the current backup data when querying the current backup data. Signaling the difference data bitmap between snapshots at that time to the main storage device, so that the main storage device queries the snapshot at the time of the current backup data and the previous backup adjacent to the current backup data a bitmap of said difference data between snapshots of data;

The backup server receives the difference data bitmap between the snapshot of the current backup data and the snapshot of the previous backup data adjacent to the current backup data;

The backup server backs up the difference data bitmap between the snapshot of the current backup data and the snapshot of the previous backup data adjacent to the current backup data to a backup storage device;

The backup server receives the feedback information sent by the backup storage device that the differential data bitmap has been backed up;

The backup server sends signaling to query the difference data corresponding to the difference data bitmap to the main storage device, so that the main storage device queries the difference data corresponding to the difference data bitmap; the backup server receives the difference data sent by the main storage device;

The backup server distributes the differential data to the backup storage device;

The backup server receives the feedback information sent by the backup storage device that the differential data has been backed up.

15. The data backup method of claim 14, wherein after the backup server receives the snapshot identifier of the snapshot sent by the primary storage device, the backup server sends a query for the current backup data. Before signaling the difference data bitmap between the snapshot at that time and the previous backup data adjacent to the current backup data to the main storage device, the method further includes: the backup server sends A first instruction is given to the main storage device, so that the main storage device establishes a mapping relationship between the snapshot and the backup server according to the first instruction;

The backup server mounts the snapshot according to the mapping relationship.

16. The data backup method as claimed in claim 15, wherein the method further includes: the backup server sending a second instruction to the main storage device, so that the main storage device performs the operation according to the second instruction. Instructs to release the mapping relationship between the backup server and the snapshot.

17. The data backup method according to any one of claims 14 to 16, characterized in that the method further includes: The backup server sends a third instruction to the main storage device, so that the main storage device deletes the snapshot of the previous backup data adjacent to the current backup data according to the third instruction.

18. A storage device, characterized by including:

A receiving unit, configured to receive a backup instruction sent by the backup server, where the backup instruction is used to instruct the storage device to generate a snapshot of the source volume;

Snapshot unit, used to generate snapshots of the source volume;

A sending unit, configured to send the snapshot identification of the snapshot to the backup server;

The receiving unit is also configured to receive signaling sent by the backup server to query the effective data bitmap of the snapshot;

A processing unit configured to query the effective data bitmap of the snapshot according to the signaling for querying the effective data bitmap of the snapshot;

The sending unit is also configured to send the valid data bitmap of the snapshot to the backup server, so that the backup server backs up the valid data bitmap of the snapshot to a backup storage device;

The receiving unit is also configured to receive signaling sent by the backup server to query the valid data corresponding to the valid data bitmap of the snapshot;

The processing unit is further configured to query the valid data according to the signaling of querying the valid data corresponding to the valid data bitmap of the snapshot;

The sending unit is also configured to send the valid data to the backup server, so that the backup server backs up the valid data to the backup storage device.

19. The storage device according to claim 18, further comprising:

Creation unit, used to create source volumes;

A mapping unit configured to map the source volume to an application server, so that the application server mounts the source volume to store data of the application server in the source volume.

20. The storage device according to claim 18, characterized in that,

The receiving unit is also configured to receive a first instruction sent by the backup server; the first instruction is used to instruct the primary storage device to establish a mapping relationship between the snapshot and the backup server; the processing The unit is further configured to establish a mapping relationship between the snapshot and the backup server according to the first instruction, so that the backup server mounts the snapshot.

21. The storage device according to claim 20, characterized in that,

The receiving unit is also configured to receive a second instruction sent by the backup server, and the second instruction is used to instruct the primary storage device to release the mapping relationship between the backup server and the snapshot; and the processing unit is further configured to release the mapping relationship between the backup server and the snapshot.

22. The storage device according to any one of claims 18 to 21, characterized in that,

The receiving unit is further configured to receive a third instruction sent by the backup server, where the third instruction is used to instruct the primary storage device to delete the snapshot of the source volume;

The processing unit is also configured to delete the snapshot of the source volume.

23. A server, characterized by including:

A sending unit, configured to send a backup instruction to the primary storage device to instruct the primary storage device to generate a snapshot of the source volume, and the primary storage device sends a snapshot identification of the snapshot to the backup server; a receiving unit, configured to Receive the snapshot identification sent by the primary storage device;

The sending unit is also configured to send a signaling for querying the valid data bitmap of the snapshot to the main storage device, so that the main storage device can query the valid data bitmap of the snapshot according to the signaling for querying the valid data bitmap of the snapshot. Query the effective data bitmap of the snapshot;

The receiving unit is also configured to receive the valid data bitmap of the snapshot sent by the main storage device;

A backup unit, used to divide the effective data bitmap of the snapshot to a backup storage device;

The receiving unit is also configured to receive feedback information sent by the backup storage device that the valid data bitmap of the snapshot has been backed up;

The sending unit is further configured to send signaling for querying the valid data corresponding to the valid data bitmap of the snapshot to the main storage according to the feedback information of the valid data bitmap of the snapshot that has been backed up. Device, so that the main storage device queries the valid data according to the signaling of querying the valid data corresponding to the valid data bitmap of the snapshot;

The receiving unit is also used to receive the valid data sent by the main storage device; the backup unit is also used to back up the valid data to the backup storage device;

The receiving unit is also configured to receive feedback information sent by the backup storage device that the valid data of the snapshot has been backed up.

24. The server according to claim 23, characterized in that,

The sending unit is further configured to send a first instruction to the main storage device according to the snapshot identifier, so that the main storage device establishes a mapping between the snapshot and the backup server according to the first instruction. relation; The server further includes: a processing unit, configured to mount the snapshot according to the mapping relationship between the snapshot and the server.

25. The server according to claim 24, characterized in that,

The sending unit is further configured to send a second instruction to the primary storage device, so that the primary storage device releases the mapping relationship between the backup server and the snapshot.

26. The server according to any one of claims 23 to 25, characterized in that,

The sending unit is also configured to send a third instruction to the main storage device, so that the main storage device deletes the snapshot of the source volume.

27. A storage device, characterized by including:

The receiving unit is configured to receive backup instructions sent by the backup server at intervals according to a preset time. The backup instructions are used to instruct the storage device to generate snapshots. The preset time is the phase between this backup data and this backup data. The time interval of the previous backup data;

A snapshot unit, configured to generate snapshots according to the backup instructions;

The receiving unit is also configured to receive the information sent by the backup server to query the difference data bitmap between the snapshot of the current backup data and the snapshot of the previous backup data adjacent to the current backup data. make;

A processing unit configured to query the current backup based on the signaling of the difference data bitmap between the snapshot when querying the current backup data and the snapshot when the previous backup data is adjacent to the current backup data. The difference data bitmap between the snapshot of the data and the snapshot of the previous backup data adjacent to the current backup data;

The sending unit is also configured to send the difference data bitmap between the snapshot of the current backup data and the snapshot of the previous backup data adjacent to the current backup data to the backup server, to causing the backup server to back up the difference data bitmap between the snapshot of the current backup data and the snapshot of the previous backup data adjacent to the current backup data to a backup storage device;

The receiving unit is also configured to receive signaling sent by the backup server to query the differential data corresponding to the differential data bitmap;

The processing unit is further configured to query the difference data according to the signaling for querying the difference data corresponding to the difference data bitmap; The sending unit is also configured to send the difference data to the backup server, so that the backup server backs up the difference data to the backup storage device.

28. The storage device according to claim 27, characterized in that,

29. The storage device according to claim 28, characterized in that,

The receiving unit is further configured to receive a second instruction sent by the backup server, where the second instruction is used to instruct the primary storage device to release the mapping relationship between the backup server and the snapshot; the processing unit , and is also used to cancel the mapping relationship between the backup server and the snapshot.

30. The storage device according to any one of claims 27 to 29, wherein the receiving unit is further configured to receive a third instruction sent by the backup server, and the third instruction is used to instruct deletion and A snapshot of the previous backup data adjacent to the current backup data;

The processing unit is also configured to delete the snapshot of the previous backup data adjacent to the current backup data.

31. A server, characterized by including:

A sending unit, configured to send backup instructions to the main storage device at intervals according to a preset time, so that the main storage device generates a snapshot according to the backup instruction, generates a snapshot by the main storage device, and sends the snapshot The snapshot is identified to the backup server; the preset time is the time interval between the current backup data and the previous backup data adjacent to the current backup data;

The receiving unit is configured to receive the snapshot identifier of the snapshot sent by the main storage device; the sending unit is also configured to send the snapshot adjacent to the backup data when querying the current backup data. The difference data bitmap between the snapshots of the previous backup data is signaled to the main storage device, so that the main storage device queries the snapshot of the current backup data and is consistent with the current backup data. The difference data bitmap between the snapshots of the previous backup data;

The receiving unit is also configured to receive the difference data bitmap between the snapshot of the current backup data and the snapshot of the previous backup data adjacent to the current backup data;

A backup unit configured to back up the difference data bitmap between the snapshot of the current backup data and the snapshot of the previous backup data adjacent to the current backup data to a backup storage device; The receiving unit is also configured to receive feedback information sent by the backup storage device that the difference data bitmap has been backed up;

The sending unit is also configured to send signaling for querying the difference data corresponding to the difference data bitmap to the main storage device, so that the main storage device queries the difference data corresponding to the difference data bitmap;

The receiving unit is also used to receive the difference data sent by the main storage device; the backup unit is also used to back up the difference data to the backup storage device; the receiving unit is also used to receive The backup storage device sends feedback information that the differential data has been backed up.

32. The server according to claim 31, characterized in that,

The sending unit is further configured to send a first instruction to the main storage device according to the snapshot identifier of the snapshot, so that the main storage device establishes a connection between the snapshot and the backup server according to the first instruction. mapping relationship;

The server further includes: a processing unit, configured to mount the snapshot according to the mapping relationship.

33. The server according to claim 32, characterized in that,

The sending unit is further configured to send a second instruction to the main storage device, so that the main storage device releases the mapping relationship between the backup server and the snapshot according to the second instruction.

34. The server according to any one of claims 31 to 33, characterized in that the sending unit is further configured to send a third instruction to the main storage device, so that the main storage device can The third instruction is to delete the snapshot of the previous backup data adjacent to the current backup data.

35. A data backup system, characterized by:

It includes the main storage device as described in any one of claims 18 to 22, and includes the backup server as described in any one of claims 23 to 26; the data backup system also includes:

The backup storage device is used to store the valid data bitmap of the snapshot of the source volume sent by the backup server; the backup storage device is also used to send feedback information of the valid data bitmap of the snapshot that has been backed up to the backup server;

The backup storage device is also used to store valid data sent by the backup server corresponding to the valid data bitmap; The backup storage device is also configured to send feedback information that valid data of the snapshot has been stored to the backup server.

36. A data backup system, characterized in that it includes the main storage device according to any one of claims 27 to 30, and the backup server according to any one of claims 31 to 34; the data backup system also includes :

Backup storage device, used to store the difference data bitmap between the snapshot of this backup data and the snapshot of the previous backup data adjacent to the current backup data;

The backup storage device is also used to send feedback information that the differential data bitmap has been backed up to the backup server;

The backup storage device is also used to store the difference data corresponding to the difference data bitmap to the backup storage device;

The backup storage device is also used to send feedback information that the difference data has been stored to the backup server.