WO2024027314A1

WO2024027314A1 - Backup data recovery method and computing device

Info

Publication number: WO2024027314A1
Application number: PCT/CN2023/097148
Authority: WO
Inventors: 陈琪
Original assignee: 超聚变数字技术有限公司
Priority date: 2022-07-30
Filing date: 2023-05-30
Publication date: 2024-02-08
Also published as: CN115421969A

Abstract

A backup data recovery method and a computing device, relating to the technical field of data backup and recovery, and used for reducing resources occupied during data recovery and improving the efficiency of data recovery. The method comprises: obtaining an identifier of backup data to be recovered (S401); when it is determined that the backup data to be recovered is incremental backup data, obtaining recovered backup data according to the identifier of the backup data to be recovered (S402), wherein the recovered backup data and the backup data to be recovered are backup data obtained on the basis of the same full backup data, and the backup time of the recovered backup data is earlier than the backup time of the backup data to be recovered; and when it is determined that the recovered backup data is not subjected to data change, according to an incremental data recovery mode, recovering the backup data to be recovered, wherein the incremental backup data recovery mode is to recover, on the basis of differential incremental backup data between the backup data to be recovered and the recovered backup data, the backup data to be recovered (S403).

Description

Backup data recovery method and computing device

This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on July 30, 2022, with the application number 202210912494.5 and the application name "Backup Data Recovery Method and Computing Device", the entire content of which is incorporated into this application by reference. middle.

Technical field

This application relates to the field of data backup and recovery, and in particular to a backup data recovery method and computing device.

Background technique

Currently, full data backup and incremental data backup are usually used for data backup. The full data backup method refers to backing up all data, and the incremental data backup method refers to backing up based on the differential data generated from the last backup data. For example, on the first day, the full data backup method is used for backup, and on the second day, the differential data generated based on the first day's full data is backed up, that is, the incremental data backup method is used for backup. By combining the full data backup method and the incremental data backup method, the computing resources and time costs occupied when backing up data are reduced. However, when restoring backup data, full data recovery is usually used to restore all backup data. For example, when restoring the first day's backup data, the full data is restored; when restoring the second day's backup data, the first day's full data and the second day's incremental data are restored, and then the next day's backup data is obtained. All data. There is no suitable way to reduce the resources occupied when restoring backup data, resulting in low recovery efficiency of backup data.

Contents of the invention

Embodiments of the present application provide a backup data recovery method and computing device, which are used to reduce the resources occupied when recovering data and improve the efficiency of data recovery.

In order to achieve the above objectives, the embodiments of this application provide the following technical solutions:

In the first aspect, a backup data recovery method is provided, which includes: obtaining the identification of the backup data to be restored; when determining that the backup data to be restored is incremental backup data, obtaining the restored backup data according to the identification of the backup data to be restored; Among them, the restored backup data and the backup data to be restored are backup data based on the same full backup data. The backup time of the restored backup data is earlier than the backup time of the backup data to be restored; when it is determined that no data changes have been made to the restored backup data. In this case, restore the backup data to be restored according to the incremental data recovery method; where the incremental backup data recovery method refers to the method of restoring the backup data to be restored based on the incremental backup data based on the difference between the backup data to be restored and the restored backup data. Way.

Currently, the full data recovery method is used to restore backup data. During the process of restoring backup data, it takes up a lot of resources and the recovery efficiency is low. In this regard, the backup data recovery method proposed in this application is adopted. When the backup data to be restored is incremental backup data, it is determined whether the restored backup data is available by monitoring whether the restored backup data is changed. When the restored backup data is available, In this case, incremental backup data is restored, thereby greatly reducing the resources occupied when restoring backup data and improving the efficiency of data restoration.

In one possible implementation, when it is determined that no data changes have been made to the restored backup data, the backup data to be restored is restored according to the incremental data recovery method, including: based on the identification of the restored backup data and the identity of the backup data to be restored. Identification, read the differential incremental backup data between the restored backup data and the backup data to be restored; restore the backup data to be restored based on the differential incremental backup data and the restored backup data.

This possible implementation method provides a specific method of restoring the backup data to be restored based on the incremental data recovery method. Implementation method, wherein the differential incremental backup data is determined and restored, and then the required backup data is obtained by combining the restored backup data. Compared with the method of recovering all data, it greatly saves the computing resources and time cost when recovering data.

In a possible implementation, the method also includes: after restoring the restored backup data, when the restored backup data undergoes data changes, recording the data change status of the restored backup data as changed; when the restored backup data When no data changes are made, the data change status of the restored backup data is recorded as unchanged; after obtaining the restored backup data, the method also includes: based on the data change status of the restored backup data, determine whether the restored backup data has changed .

This possible implementation method provides a specific implementation method for recording the data change status of restored backup data, thereby improving the implementability of the solution.

In a possible implementation, the method also includes: after restoring the restored backup data, when the restored backup data undergoes data changes, recording the data change status of the restored backup data; when the restored backup data does not undergo data changes, When changing, the data change status of the restored backup data is not recorded; after obtaining the restored backup data, the method also includes: determining whether the restored backup data has changed based on whether the data change status of the restored backup data is recorded.

In a possible implementation, before determining whether data changes have been made to the restored backup data, the method also includes: using MyWrite to write the file system function to replace the operating system's writing file system function, and the MyWrite writing file system function is used to record the restored backup data. The data change status of the backup data.

In one possible implementation, after obtaining the identifier of the backup data to be restored, the method further includes: if the identifier of the backup data to be restored is an incremental backup identifier, determining that the backup data to be restored is the incremental backup data.

This possible implementation method provides a specific implementation method of determining the backup data type of the backup data to be restored based on the identification of the backup data to be restored. By determining that the backup data to be restored is incremental backup data, it is convenient to follow up based on the backup data to be restored. The backup data type for restoring backup data determines the method of restoring backup data, improving the implementability of the solution.

In a possible implementation, the identifier of the backup data to be restored includes a full backup data sequence number and an incremental backup data sequence number; if the identifier of the backup data to be restored is an incremental backup identifier, determine that the backup data to be restored is an incremental Backup data, including: If the incremental backup data identifier includes the incremental backup data sequence number, it is determined that the backup data to be restored is incremental backup data.

This possible implementation method provides a specific implementation method of determining the backup data type of the backup data to be restored based on the identification of the backup data to be restored, and determining the backup data to be restored based on whether there is an incremental backup data sequence number in the identification. Whether the backup data is incremental will facilitate the subsequent determination of the backup data recovery method based on the backup data type of the backup data to be restored, thereby improving the implementability of the solution.

In a possible implementation, the method also includes: when the backup data to be restored is full backup data, restoring the backup data to be restored according to a full data recovery method; wherein the full data recovery method refers to the backup data to be restored. All data for data recovery.

This possible implementation method provides a recovery method when the backup data to be restored is full backup data, which helps to improve the integrity of the solution.

In a possible implementation, the method also includes: when it is determined that the restored backup data has undergone data changes, restoring the backup data to be restored according to a full data recovery method; wherein the full data recovery method refers to the backup data to be restored. All data in the backup data can be recovered.

This possible implementation method provides a recovery method for the backup data to be restored when data changes occur in the restored backup data, which helps to improve the integrity of the solution.

A second aspect provides a computing device, including: a functional unit for executing any method provided in the first aspect, and the actions performed by each functional unit are implemented by hardware or by hardware executing corresponding software. For example, the computing device may include: an acquisition unit and a processing unit; an acquisition unit configured to acquire an identification of the backup data to be restored; an acquisition unit further configured to: when it is determined that the backup data to be restored is incremental backup data, according to the backup data to be restored The identifier is used to obtain the restored backup data; among them, the restored backup data and the backup data to be restored are backup data obtained based on the same full backup data, and the backup time of the restored backup data is earlier than the backup time of the backup data to be restored. The processing unit is used to restore the backup data to be restored according to the incremental data recovery method when it is determined that the restored backup data has not been changed. The incremental backup data recovery method refers to the method based on the backup data to be restored and the restored backup. The difference between the data, incremental backup data, and the way to restore the backup data to be restored.

In a third aspect, a computing device is provided, including: a processor and a memory. The processor is connected to the memory, the memory is used to store computer execution instructions, and the processor executes the computer execution instructions stored in the memory, thereby implementing any method provided in the first aspect.

The fourth aspect provides a chip, which includes: a processor and an interface circuit; the interface circuit is used to receive code instructions and transmit them to the processor; the processor is used to run the code instructions to execute any of the instructions provided in the first aspect. a way.

In a fifth aspect, a computer-readable storage medium is provided, which includes computer-executable instructions. When the computer-executable instructions are run on a computer, they cause the computer to execute any method provided in the first aspect.

A sixth aspect provides a computer program product, which includes computer execution instructions. When the computer execution instructions are run on a computer, they cause the computer to execute any method provided in the first aspect.

The technical effects brought by any implementation method in the second to sixth aspects can be found in the technical effects brought by the corresponding implementation method in the first aspect, and will not be described again here.

Description of drawings

Figure 1 is a schematic diagram of a data backup and recovery scenario;

Figure 2 is a schematic diagram of the hardware structure of a computing device provided by an embodiment of the present application;

Figure 3 is a schematic diagram of a differential incremental data backup method provided by an embodiment of the present application;

Figure 4 is a schematic flow chart of a backup data recovery method provided by an embodiment of the present application;

Figure 5 is a schematic diagram of an operating system provided by an embodiment of the present application;

Figure 6 is a schematic diagram of an incremental backup data recovery method provided by an embodiment of the present application;

Figure 7 is a schematic diagram of a cumulative incremental data backup method provided by an embodiment of the present application;

Figure 8 is a schematic flow chart of a backup data recovery method provided by an embodiment of the present application;

Figure 9 is a schematic diagram of the composition of a computing device provided by an embodiment of the present application.

Detailed ways

In the description of this application, unless otherwise stated, "/" means "or". For example, A/B can mean A or B. "And/or" in this article is just an association relationship that describes related objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone these three situations. In addition, "at least one" means one or more, and "plurality" means two or more. Words such as "first" and "second" do not limit the quantity and order of execution, and words such as "first" and "second" do not limit the number or order of execution.

It should be noted that in this application, words such as “exemplary” or “for example” are used to represent examples, illustrations or explanations. Any embodiment or design described herein as "exemplary" or "such as" is not intended to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the words "exemplary" or "such as" is intended to present the concept in a concrete manner.

Currently, data backup and recovery can be applied to scenarios as shown in Figure 1, including production systems and backup systems. The production system can be understood as the user host, used to meet the user's data processing needs. The backup system is used to regularly copy the data of the production system. When the production system fails, the backup data can be restored for users to avoid data loss. In addition, when the backup system has the data processing capabilities of the production system, it can also be used as a replacement production system, allowing users to read or write backup data through the backup system when the production system is unavailable. Among them, the production system includes computing equipment and storage equipment, and the processing equipment is used to call data in the storage device for processing. Among them, the processing device completes the tasks specified by the user for the application through computer instructions saved in the operating system, and this process includes the data processing process for the application. As a communication module between the backup system and the production system, the backup agent is used to identify the information in the production system and copy the data to the backup system to realize the interaction between the backup system and the production system. The backup system also includes computing devices and storage devices to process and store backup data.

The embodiments of this application do not place any restrictions on the specific form of the computing device. For example, the computing device may be a terminal device or a network device. Among them, the terminal device may be called: terminal, user equipment (UE), terminal equipment, mobile device, user terminal, wireless communication equipment, etc. The terminal device may be a mobile phone, an augmented reality (AR) device, a virtual reality (VR) device, a tablet computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, or a personal computer. Digital assistant (personal digital assistant, PDA), etc. The network device may specifically be a server, etc. Among them, the server can be a physical or logical server, or there can be two or more physical or logical servers that share different responsibilities and cooperate with each other to realize various functions of the server.

In a possible implementation, the production system and the backup system can communicate through a network. Optionally, the communication network is a wired network or a wireless network.

Optionally, the above-mentioned wireless network or wired network uses standard communication technologies and/or protocols. The network is usually the Internet, but can be any network, including but not limited to local area network (LAN), metropolitan area network (MAN), wide area network (WAN), mobile, wired or wireless Any combination of networks, private networks, or virtual private networks. In some embodiments, data exchanged over the network is represented using technologies and/or formats including hypertext mark-up language (HTML), extensible markup language (XML), etc. In addition, you can also use protocols such as secure socket layer (SSL), transport layer security (TLS), virtual private network (VPN), and Internet protocol security (IPsec). Wait for conventional encryption techniques to encrypt all or some links. In other embodiments, customized and/or dedicated data communication technologies may also be used in place of or in addition to the above-described data communication technologies.

Embodiments of the present application provide a backup data recovery method, which can be applied to computing devices. The embodiments of this application do not place any restrictions on the specific form of the computing device. For example, it may specifically be a terminal device. Wherein, the terminal device may be called: terminal, user equipment (UE), terminal equipment, user terminal, wireless communication device, user agent or user device, etc. The terminal device may be a mobile phone, an augmented reality (AR) device, a virtual reality (VR) device, a tablet computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, or a personal computer. Digital assistant (personal digital assistant, PDA), etc.

It can be understood that the computing device can be a device corresponding to the above-mentioned production system or backup system, or it can also be a device corresponding to the above-mentioned production system or backup system. A device corresponding to the integrated production system and the backup system, or a device corresponding to the backup data in the backup system.

In this application, the structure of the computing device may be as shown in Figure 2. As shown in FIG. 2 , it is a schematic diagram of the hardware structure of a computing device 20 provided by an embodiment of the present application. The computing device 20 may be used to implement the functions of the computing device described above.

The computing device 20 shown in FIG. 2 may include: a processor 201, a memory 202, a communication interface 203, and a bus 204. The processor 201, the memory 202 and the communication interface 203 may be connected through a bus 204.

The processor 201 is the control center of the computing device 20 and can be a general central processing unit (CPU) or other general processor. The general processor may be a microprocessor or any conventional processor.

As an example, processor 201 may include one or more CPUs, such as CPU 0 and CPU 1 shown in FIG. 2 .

Memory 202 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory (RAM)) or other type that can store information and instructions. A dynamic storage device can also be an electrically erasable programmable read-only memory (EEPROM), a disk storage medium or other magnetic storage device, or can be used to carry or store instructions or data structures. The desired program code and any other medium capable of being accessed by a computer, without limitation.

In a possible implementation, the memory 202 may exist independently of the processor 201. The memory 202 can be connected to the processor 201 through the bus 204 for storing data, instructions or program codes. When the processor 201 calls and executes the instructions or program codes stored in the memory 202, it can implement the backup data recovery method provided by the embodiment of the present application.

In another possible implementation, the memory 202 can also be integrated with the processor 201 .

The communication interface 203 is used to connect the computing device 20 with other devices through a communication network. The communication network can be Ethernet, wireless access network (radio access network, RAN), wireless local area networks (WLAN), etc. The communication interface 203 may include a receiving unit for receiving data, and a transmitting unit for transmitting data.

The bus 204 may be an industry standard architecture (ISA) bus, a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used in Figure 2, but it does not mean that there is only one bus or one type of bus.

It should be noted that the structure shown in Figure 2 does not constitute a limitation on the computing device 20. In addition to the components shown in Figure 2, the computing device 20 may include more or less components than shown in the figure, or a combination of certain components. components, or different component arrangements.

Currently, in order to save resources when backing up data, an incremental data backup method is proposed, which is based on the differential data generated by the backup data. Among them, there are two methods of differential incremental data backup and cumulative incremental data backup. The following is a description of the technical solutions provided by the embodiments of the present application with respect to the two incremental data backup methods in conjunction with the accompanying drawings.

As shown in Figure 3, it is a schematic diagram of a differential incremental data backup method. The differential incremental data backup method refers to backing up based on the differential data generated from the last backup data. For example, on the first day, use the full data backup method to back up all data; on the second day, use the differential incremental data backup method to back up the differential data generated based on all the data on the first day; on the third day, use The differential incremental data backup method is used to back up the differential data generated based on all the data on the second day; the differential incremental data backup method is used on the fourth day to back up the differential data generated based on all the data on the third day. ; Use full data backup method to back up all data on the fifth day.

Among them, the backup data on the first and fifth days are full backup data, and the backup data on the second, third and fourth days are incremental backup data. Full backup data refers to all data, and incremental backup data refers to data generated based on the backed up data. difference data. The above-mentioned full backup data and incremental backup data are backup data types and correspond to the backup methods one-to-one, that is, the full data backup method is used to obtain full backup data, and the incremental data backup method is used to obtain incremental backup data.

It is understandable that the incremental backup data on the second, third and fourth days do not represent all the data on the second, third and fourth days. In other words, if you want to obtain all the data for the next day, you need to restore the full backup data of the first day and the incremental backup data of the next day. Based on the restored full backup data and the incremental backup data of the next day, you can obtain All the data of the second day; similarly, to obtain all the data of the third day, you need to restore the full backup data of the first day, the incremental backup data of the second day and the incremental backup data of the third day. According to the restored The full backup data, the incremental backup data of the next day, and the incremental backup data of the third day are used to obtain all the data of the third day.

It is understandable that compared with backing up all data, backing up differential data helps to complete data backup with less computing resources and time costs, thus greatly improving the efficiency of backing up data.

Among them, the above time information such as the first day and the second day represents the backup time. For example, the first day mentioned above can be understood as the time to start the backup, the second to the fourth day can be understood as the backup time for the differential data generated by the backup data, and the fifth day can be understood as the time for complete backup of the data, for example weekend. Assuming that the full data backup time is a backup cycle, then performing full data backup periodically and using differential incremental data backup within the cycle will help improve the efficiency of backup data while ensuring the accuracy of the backup data.

For the backup data obtained by the above differential incremental data backup method, currently, when restoring the backup data, the full data recovery method is usually used, as described above for the recovery actions performed when obtaining all the data of the second and third days. However, this recovery method is more cumbersome, and the recovery process takes up more computing resources and time costs. In this regard, this application proposes a backup data recovery method, which determines whether the restored backup data is available by monitoring whether the restored backup data has changed, and restores the incremental backup data when the restored backup data is available, thereby maximizing the Significantly reduces the resources consumed when restoring backup data.

As shown in Figure 4, it is a flow chart of a backup data recovery method provided by an embodiment of the present application. The method includes:

S401. Obtain the identifier of the backup data to be restored.

It can be understood that the method provided by the present application is used to restore backup data. When the computing device can obtain the backup data and has the ability to restore the backup data, the method provided by the embodiment of the present application can be executed. Therefore, when the production system or backup system restores the backup data, the method provided by the embodiment of the present application can be executed. Alternatively, when the device integrating the production system and the backup system restores the backup data, the method provided by the embodiment of the present application can be executed. Alternatively, when other equipment restores backup data, for example, when the production system and/or the backup system's data recovery processing device fails, other equipment can achieve recovery by executing the method provided by the embodiments of the present application on the premise of obtaining the backup data. Back up your data. This application does not impose any restrictions on this.

Among them, the backup data to be restored refers to the target data that the user needs to obtain. The identifier of the backup data to be restored is used to indicate the target data.

In a possible implementation manner, the identification of the backup data to be restored includes a full backup data sequence number and an incremental backup data sequence number. Illustratively, as shown in Table 1 below, it is an example of the information indicated by the identifier of the backup data.

Table 1

Among them, in Table 1 above, the identifier indicates unique backup data, and the backup data has corresponding full backup data sequence numbers and incremental backup data sequence numbers. As shown in Table 1 above, the identification is expressed in the form of a serial number of X.Y, where X is the full backup serial number, indicating the serial number of the full backup data. Y is the incremental backup sequence number, which represents the sequence number of the incremental backup data based on the full backup data X. Both X and Y are natural numbers greater than zero. For example, the identifier of the backup data on the first day is 1. According to its identifier, it can be known that the backup method of the backup data is the full data backup method; the identifier of the backup data of the second day is 1.1. According to its identifier, it can be known that the backup data of the backup data is 1.1. The backup method is incremental data backup, and the identifier of the incremental backup data is 1.1, and the identifier of the corresponding full backup data is 1, that is, based on the backup data of the first day, the incremental data backup method is used for backup. .

It can be understood that the above-mentioned serial number has a corresponding relationship with the backup time of the backup data. For example, the backup data is represented by serial numbers from small to large, each backup data corresponds to its own backup time, and the backup data with a smaller serial number corresponds to The backup time is earlier, and the backup data with larger serial number corresponds to a later backup time. The above serial number representation of backup data helps improve the efficiency of users in locating the required backup data and facilitates search.

In addition, in the above example, carrying the identifier of the full backup data before the identifier of the incremental backup data helps the computing device determine the full backup data corresponding to the incremental backup data. For example, the backup data identified as 1.1 is used to indicate the first incremental backup data based on the full backup data 1, and the backup data identified as 1.2 is used to indicate the second incremental backup data based on the full backup data 1.

It can be understood that when the identification of the backup data to be restored does not include the incremental backup data sequence number, it means that the backup data to be restored is full backup data. In another possible implementation, the incremental backup data sequence number may be zero, indicating that the backup data to be restored is full backup data.

It should be noted that the above-mentioned identification of backup data in the form of serial numbers is only an example. The identification of backup data can also be in the form of alphabetical sequences or other forms, and this embodiment of the present application does not limit this.

S402. When it is determined that the backup data to be restored is incremental backup data, obtain the restored backup data according to the identification of the backup data to be restored.

Among them, the restored backup data and the backup data to be restored are backup data based on the same full backup data, and the backup time of the restored backup data is earlier than the backup time of the backup data to be restored.

Optionally, the computing device determines whether the backup data to be restored is incremental backup data based on the identification of the backup data to be restored. As described in the above step S401 of the identification of the backup data to be restored, when the incremental backup sequence number of the backup data to be restored exists, it means that the backup data to be restored is incremental backup data. Similarly, if the above conditions are not met, it means that the backup data to be restored is full backup data.

It can be understood that when the backup data to be restored is full backup data, the computing device restores the backup data to be restored according to the full data recovery method. Among them, the full data recovery method refers to data recovery of all data in the backup data to be restored. For example, as shown in Table 1, the corresponding relationship between backup data and identifiers, when the identifier of the backup data to be restored is 1 or 2, the computing device determines that the backup data to be restored is full backup data, and directly restores the data according to the full data recovery method. Restore the backup data to be restored.

Optionally, the computing device obtains the restored backup data based on the full backup sequence number and the incremental backup sequence number in the identification of the backup data to be restored. The restored backup data is determined in the identification manner in step S401. Specifically, the first restored backup data set with the same full backup sequence number is determined according to the full backup sequence number of the backup data to be restored. Then, based on the incremental backup data sequence number of each backup data in the first restored backup data set, it is determined that the restored backup data corresponding to the incremental backup data sequence number that is smaller than the incremental backup data sequence number of the backup data to be restored is used as the second restored backup data. Restore the backup data set. Any restored backup data in the second restored backup data set can be used for the purposes provided by this application. Backup data recovery methods.

Optionally, the computing device determines the restored backup data closest to the incremental backup data sequence number of the backup data to be restored based on the incremental backup data sequence number of each backup data in the second restored backup data set, and restores the restored backup data. The backup data is used as the target restored backup data for subsequent restoration of the backup data to be restored. For example, when the identifier of the backup data to be restored is 1.2, if it is determined that the restored backup data set with the same full backup sequence number includes {1,1.1}, then the latest backup data set is determined based on the incremental sequence number 2 of the backup data to be restored. The restored backup data is 1.1.

It can be understood that the embodiment of the present application adopts the method of restoring incremental backup data to save data recovery resources. When the backup time of the full backup data based on the incremental backup data is closer to the backup time of the backup data to be restored, it is necessary to The less incremental backup data is restored, the fewer resources are occupied to restore the backup data, and the higher the efficiency of restoring the backup data.

S403. When it is determined that the restored backup data has not undergone data changes, restore the backup data to be restored according to the incremental data recovery method; wherein the recovery method of the incremental backup data is based on the difference between the backup data to be restored and the restored backup data. Differential incremental backup data, a way to restore the backup data to be restored.

Optionally, before executing step S403, the computing device determines whether data changes have been made to the restored backup data. Among them, whether data changes have been made to the restored backup data refers to whether the restored backup data has been changed after the restoration. If no data changes have been made, it means that the restored data is consistent with the backup data before restoration. ; If data changes are made, it means that the data after recovery has changed and is inconsistent with the backup data before recovery.

Optionally, whether data changes have been made to the above restored backup data, after restoring the restored backup data, it can be recorded in the following way.

In the first possible implementation manner, when the restored backup data undergoes data changes, the computing device records that the data change status of the restored backup data is changed; when the restored backup data copy does not undergo data changes, the computing device records that the data has been changed. The data change status of the restored backup data is unchanged.

In the second possible implementation method, when the restored backup data undergoes data changes, the computing device records the data change status of the restored backup data; when the restored backup data copy does not undergo data changes, the computing device does not record the restored backup. The data change status of the data.

Based on the above first possible implementation method, after obtaining the restored backup data, the computing device determines whether the restored backup data has changed based on the data change status of the restored backup. Among them, the data change status includes changed or unchanged.

Based on the above second possible implementation method, after obtaining the restored backup data, the computing device determines whether the restored backup data has changed based on whether the data change status of the restored backup data is recorded.

For example, "1" and "0" respectively indicate that the data change status is changed or unchanged. The data change status is 1 to indicate that the restored backup data has been changed, and the data change status is 0 to indicate that the restored backup data has been changed. Indicates that the backup data has been restored without data changes. After the restored backup data is restored, the data change status is recorded as 0. If a change occurs, the data change status is updated to 1. Or, when the data changes, the data change status is recorded, and when the data does not change, the data change status is not recorded.

Optionally, if the above restored backup data undergoes data changes, perform full data recovery on the backup data to be restored.

It can be understood that if data changes occur in the restored backup data, it means that the restored backup data has changed relative to the backup data before restoration. Therefore, it is impossible to obtain the information that needs to be restored based on the restored backup data and incremental backup data. Back up your data. The computing device obtains the required backup data through full data recovery.

Optionally, if no data changes have been made to the restored backup data, perform incremental data recovery on the backup data to be restored.

Optionally, the above-mentioned recording of whether the restored backup data has been changed can be achieved in the following way: before the computing device determines whether the restored backup data has been changed, it uses the MyWrite write file system function to replace the operating system write file system function. The MyWrite The write file system function is used to record the data change status of restored backup data.

Among them, the MyWrite write file system function, compared with the write file system function in the Linux operating system, not only has the data writing function, but also can monitor whether the written data changes the restored backup data. As shown in Figure 5, by modifying the operating system LD_PRELOAD environment variable, replace the preloaded library (preloaded library) database schema definition language (data definition language) in the original operating system (portable operating system interface, POSIX) , DDL) library file address, replace the write file system function with the MyWrite write file system function.

It can be understood that the above method is used to monitor whether the restored backup data undergoes data changes, and determines whether to record the data change status, so that the computing device determines the recovery method of the backup data to be restored based on the data change status of the restored backup data.

As shown in Figure 6, it is a schematic diagram of an incremental data recovery method. The above-mentioned step S403 will be described in detail below by taking the application to FIG. 5 as an example.

In one possible implementation, the backup data to be restored is the third day's incremental backup data 1.2, and the computing device obtains the restored backup data as the first day's backup data as the full backup data 1. At this time, the restored backup data meets the conditions that its backup time is earlier than the backup time of the backup data to be restored, and both are backup data based on the same full backup data. When the computing device adopts the incremental data recovery method, the backup data to be restored is restored by restoring the incremental backup data that is the difference between the full backup data 1 and the incremental backup data 1.2. Among them, the difference between the full backup data 1 and the incremental backup data 1.2. The incremental backup data includes the incremental backup data 1.1 and the incremental backup data 1.2.

In another possible implementation, the backup data to be restored is the third day's incremental backup data 1.2, and the computing device obtains the restored backup data as the next day's backup data, which is the full backup data 1 and the incremental backup data 1.1. . At this time, the restored backup data meets the conditions that its backup time is earlier than the backup time of the backup data to be restored, and both are backup data based on the same full backup data. When the computing device adopts the incremental data recovery method, the backup data to be restored is restored by restoring the incremental backup data that is the difference between the incremental backup data 1.1 and the incremental backup data 1.2. Among them, the difference between the full backup data 1 and the incremental backup data 1.2, the incremental backup data includes the incremental backup data 1.2.

Through the above method, when the backup data to be restored is incremental backup data, it is determined whether the restored backup data is available by monitoring whether the restored backup data has changed. If the restored backup data is available, the incremental backup data is restored. , thereby greatly reducing the resources occupied when restoring backup data and improving the efficiency of data restoration.

As shown in Figure 7, it is a schematic diagram of a cumulative incremental data backup method. The cumulative incremental data backup method means that the differential data generated by the last full backup data is accumulated and then backed up. For example, on the first day, use the full data backup method to separate all data; on the second day, use the cumulative incremental data backup method to back up the differential data based on all the data on the first day; on the third day Using the cumulative incremental data backup method, the differential data generated based on all the data on the first day is accumulated and then backed up. Among them, the difference data accumulated on the third day includes the difference data of the second day and the difference data of the third day. At this time, if you want to obtain the data of the third day, you need to restore the full data of the first day and the accumulated difference data of the third day compared to the first day.

It is understandable that the backup data on the first day is full backup data, and the backup data on the second and third days are cumulative incremental backup data. Among them, the accumulated incremental backup data refers to the differential data generated based on the full backup data, which is a special kind of incremental backup data. The cumulative incremental data backup method can be understood as a special differential incremental data backup method.

Among them, as shown in Figure 7, if you want to obtain all the data of the next day, you need to restore the full backup data of the first day and The next day's cumulative incremental backup data. Similarly, to obtain all the data on the third day, you need to restore the full backup data on the first day and the cumulative incremental backup data on the third day.

It is understandable that compared to backing up all data, backing up accumulated differential data helps to complete data backup with less computing resources and time costs, thus greatly improving the efficiency of backing up data.

Correspondingly, when the computing device determines that the backup data to be restored is incremental backup data, it can determine whether the full backup data corresponding to the full backup data sequence number of the backup data to be restored is restored backup data. If the restored backup exists, data, the corresponding accumulated incremental backup data can be restored according to the incremental backup data sequence number of the backup data to be restored, and then the restored backup data to be restored can be obtained through the accumulated incremental backup data and the restored backup data.

Through the above method, compared with all data backed up using the cumulative incremental data backup method, the full backup data recovery method is used when restoring the backup data, which helps to reduce the amount of backup data that needs to be restored, thereby improving Recovery efficiency of backup data.

To sum up, as shown in Figure 8, it is a complete flow chart of a backup data recovery method provided by an embodiment of the present application. Including steps S801-S809.

S801. Obtain the identifier of the backup data to be restored.

Same as step S401 above.

S802. Determine whether the data is fully backed up.

Optionally, the computing device determines whether the backup data is full backup data based on the identification of the backup data to be restored.

If yes, perform step S803; if not, perform step S808 to restore using the full data recovery method.

S803. Determine whether restored backup data exists.

Specifically, it is determined that the backup data has been restored according to the above step S402.

If yes, continue to execute step S804; if not, execute step S808.

S804. Determine whether to perform data changes.

Optionally, determine whether data changes have occurred in the restored backup data based on the data change status of the restored backup data.

If yes, perform step S808; if not, perform step S805.

S805. Obtain the restored backup data.

Specifically, it is determined that the backup data has been restored according to the above step S403.

S806. Calculate the minimum backup data set that needs to be restored.

When the backup method is differential incremental data backup, the minimum backup data set can be determined based on a set of differential incremental backup data between the identifiers of the restored backup data and the backup data to be restored. When the backup method is cumulative incremental data backup, the minimum backup data set can be determined based on the cumulative incremental data corresponding to the backup data to be restored.

Among them, the minimum backup data set can determine the closest backup data to be restored as the restored backup data among the incremental backup data sequence numbers smaller than the backup data to be restored in the above step S805, and then the restored backup data is the same as the backup to be restored. The difference data between data is the minimum backup data set.

S807. The computing device performs recovery using incremental data recovery.

Specifically, the computing device restores the above-mentioned minimum backup data set, and restores the backup data to be restored based on the restored backup data and the minimum backup data set.

S809. The computing device resets the data change status.

Among them, resetting the data change status means updating the currently restored backup data, and accordingly, the data change status is also updated. For example, in Figure 3, the identifier of the backup data to be restored is 1.1, and the identifier of the restored backup data is 1. If the data change status indicating that the restored backup data is 1 or 0, it is used to indicate the backup data with the identifier 1 data change status; when the backup data identified as 1.1 is restored, the currently restored backup data should be updated to 1.1, and its data The change status should also be updated, e.g. reset to -1, in contrast to the data change status above indicating whether the data has changed or not.

The backup data recovery method provided through the above steps S801-S809 helps the user determine the specific recovery method according to the different states of the backup data, and determine the minimum backup data set when the restored backup data is available, so as to achieve the goal of achieving the goal through comparison. Use as little time and computing resources as possible to restore the required backup data with the highest possible efficiency.

The above mainly introduces the solutions of the embodiments of the present application from the perspective of methods. It can be understood that, in order to implement the above functions, the backup data recovery device includes at least one of a hardware structure and a software module corresponding to each function. Persons skilled in the art should easily realize that, with the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving the hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.

Embodiments of the present application can divide the backup data recovery device (such as a computing device) into functional units according to the above method examples. For example, each functional unit can be divided corresponding to each function, or two or more functions can be integrated into one in the processing unit. The above integrated units can be implemented in the form of hardware or software functional units. It should be noted that the division of units in the embodiment of the present application is schematic and is only a logical function division. In actual implementation, there may be other division methods.

In the case where each functional module is divided corresponding to each function, FIG. 9 shows a possible structural diagram of the computing device involved in the above embodiment. As shown in FIG. 9 , the computing device 90 includes an acquisition unit 901 and a processing unit 902 .

The obtaining unit 901 is used to obtain the identification of the backup data to be restored. For example, the above steps S401 and S801.

The acquisition unit 901 is also used to obtain the restored backup data according to the identification of the backup data to be restored when it is determined that the backup data to be restored is incremental backup data; wherein the restored backup data and the backup data to be restored are based on the same full backup The backup data obtained by the data, the backup time of the restored backup data is earlier than the backup time of the backup data to be restored. For example, the above-mentioned steps S402 and S805.

The processing unit 902 is configured to restore the backup data to be restored according to the incremental data recovery method when it is determined that the restored backup data has not been changed. The incremental backup data recovery method refers to the method based on the backup data to be restored and the restored backup data. The difference between the backup data, the incremental backup data, and the way to restore the backup data to be restored. For example, the above-mentioned steps S403 and S807.

In one example, the processing unit 902 is specifically configured to: read the differential incremental backup data between the restored backup data and the backup data to be restored according to the identifier of the restored backup data and the identifier of the backup data to be restored; Differential incremental backup data and restored backup data restore the backup data to be restored.

In one example, the processing unit 902 is also configured to: after restoring the restored backup data, when the restored backup data undergoes data changes, record the data change status of the restored backup data as changed; when the restored backup data When no data changes are made, the data change status of the restored backup data is recorded as unchanged; based on the data change status of the restored backup data, it is determined whether the restored backup data has changed.

In one example, the processing unit 902 is also configured to: after restoring the restored backup data, when the restored backup data undergoes data changes, record the data change status of the restored backup data; when the restored backup data does not undergo data changes, When changing, the data change status of the restored backup data is not recorded; based on whether the data change status of the restored backup data is recorded, it is determined whether the restored backup data has changed.

In one example, the processing unit 902 is also configured to replace the operating system's file system writing function with the MyWrite writing file system function, which is used to record the data change status of the restored backup data.

In one example, the processing unit 902 is also configured to: if the identifier of the backup data to be restored is an incremental backup identifier, confirm The backup data to be restored is incremental backup data.

In one example, the identifier of the backup data to be restored includes a full backup data sequence number and an incremental backup data sequence number. The processing unit 902 is specifically configured to: if the incremental backup data identifier includes an incremental backup data sequence number, determine Restoring backup data is incremental backup data.

In one example, the processing unit 902 is also configured to: when the backup data to be restored is full backup data, restore the backup data to be restored according to a full data recovery method; where the full data recovery method refers to the backup data to be restored. All data for data recovery.

In one example, the processing unit 902 is also configured to: when it is determined that the backup data has been restored and the data has been changed, restore the backup data to be restored according to the full data recovery method; where the full data recovery method refers to the backup data to be restored All data in the file can be recovered.

All relevant content of each step involved in the above method embodiments can be quoted from the functional description of the corresponding functional module, and will not be described again here.

Of course, the computing device provided by the embodiment of the present application includes but is not limited to the above-mentioned units. For example, the computing device may also include a storage unit 903.

Storage unit 903 may be used to store program codes and data for the computing device.

The acquisition unit 901 in the computing device 90 can correspondingly execute the function of the receiving unit in the communication interface 203 in FIG. 2 , and the processing unit 902 can correspondingly execute the function of the processor 201 in FIG. 2 .

Embodiments of the present application also provide a computer-readable storage medium. A computer program is stored on the computer-readable storage medium. When the computer program is run on a computer, it causes the computer to execute any of the computing devices provided above. The method performed.

For explanations of relevant contents and descriptions of beneficial effects in any of the computer-readable storage media provided above, reference may be made to the corresponding embodiments described above and will not be described again here.

An embodiment of the present application also provides a chip. The chip integrates a control circuit and one or more ports for implementing the above computing device functions. Optionally, the functions supported by this chip can be referred to above and will not be described again here. Those of ordinary skill in the art can understand that all or part of the steps to implement the above embodiments can be completed by instructing relevant hardware through programs. The program may be stored in a computer-readable storage medium. The storage medium mentioned above may be a read-only memory, a random access memory, etc. The above-mentioned processing unit or processor can be a central processing unit, a general-purpose processor, an application specific integrated circuit (ASIC), a microprocessor (digital signal processor, DSP), a field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof.

Embodiments of the present application also provide a computer program product containing instructions. When the instructions are run on a computer, they cause the computer to perform any of the methods in the above embodiments. The computer program product includes one or more computer instructions. When computer program instructions are loaded and executed on a computer, processes or functions according to embodiments of the present application are generated in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device. Computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, e.g., computer instructions may be transmitted from a website, computer, server or data center via a wired (e.g. Coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means to transmit to another website, computer, server or data center. Computer-readable storage media can be any available media that can be accessed by a computer or include one or more data storage devices such as servers and data centers that can be integrated with the media. Available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media (eg, SSD), etc.

It should be noted that the above-mentioned devices for storing computer instructions or computer programs provided by the embodiments of the present application, such as but not limited to the above-mentioned memories, computer-readable storage media, communication chips, etc., are all non-transitory. .

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using a software program, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When computer program instructions are loaded and executed on a computer, processes or functions according to embodiments of the present application are generated in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device. Computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, e.g., computer instructions may be transmitted from a website, computer, server or data center via a wired (e.g. Coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means to transmit to another website, computer, server or data center. Computer-readable storage media can be any available media that can be accessed by a computer or include one or more data storage devices such as servers and data centers that can be integrated with the media. Available media may be magnetic media (eg, floppy disk, hard disk, tape), optical media (eg, DVD), or semiconductor media (eg, solid state disk (SSD)), etc.

Although the present application has been described herein in connection with various embodiments, in practicing the claimed application, those skilled in the art can understand and implement the disclosure by reviewing the drawings, the disclosure, and the appended claims. Other variations of the embodiment. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit may perform several of the functions recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not mean that a combination of these measures cannot be combined to advantageous effects.

Although the present application has been described in conjunction with specific features and embodiments thereof, it will be apparent that various modifications and combinations may be made without departing from the spirit and scope of the application. Accordingly, the specification and drawings are intended to be merely illustrative of the application as defined by the appended claims and are to be construed to cover any and all modifications, variations, combinations or equivalents within the scope of the application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

A backup data recovery method, characterized by including:

Obtain the identification of the backup data to be restored;

When it is determined that the backup data to be restored is incremental backup data, the restored backup data is obtained according to the identification of the backup data to be restored; wherein the restored backup data and the backup data to be restored are based on the same full amount. The backup data obtained from the backup data, the backup time of the restored backup data is earlier than the backup time of the backup data to be restored;

When it is determined that the restored backup data has not undergone data changes, the backup data to be restored is restored according to an incremental data recovery method; wherein the incremental backup data recovery method refers to a method based on the backup data to be restored and the backup data to be restored. The difference between the restored backup data and the incremental backup data, and the method of restoring the backup data to be restored.
The method according to claim 1, characterized in that, when it is determined that the restored backup data has not undergone data changes, restoring the backup data to be restored according to an incremental data recovery method includes:

According to the identifier of the restored backup data and the identifier of the backup data to be restored, read the differential incremental backup data between the restored backup data and the backup data to be restored;

The backup data to be restored is restored according to the differential incremental backup data and the restored backup data.
The method according to claim 1 or 2, characterized in that, the method further includes:

After restoring the restored backup data, when the restored backup data undergoes data changes, record the data change status of the restored backup data as changed; when the restored backup data does not undergo data changes, Record the data change status of the restored backup data as unchanged;

After obtaining the restored backup data, the method further includes:

Based on the data change status of the restored backup data, it is determined whether the restored backup data has been changed.
The method according to claim 1 or 2, characterized in that, the method further includes:

After the restored backup data is restored, when the restored backup data undergoes data changes, the data modification status of the restored backup data is recorded; when the restored backup data does not undergo data changes, all data changes are not recorded. Describe the data change status of the restored backup data;

After obtaining the restored backup data, the method further includes:

Based on whether the data change status of the restored backup data is recorded, it is determined whether the restored backup data has changed.
The method according to claim 3 or 4, characterized in that, before determining whether the restored backup data undergoes data changes, the method further includes:

The MyWrite file system writing function is used to replace the operating system writing file system function. The MyWrite writing file system function is used to record the data change status of the restored backup data.
The method according to any one of claims 1 to 5, characterized in that, after obtaining the identification of the backup data to be restored, the method further includes:

If the identifier of the backup data to be restored is an incremental backup data identifier, it is determined that the backup data to be restored is the incremental backup data.
The method according to claim 6, wherein the identification of the backup data to be restored includes a full backup data serial number and an incremental backup data sequence number; if the identification of the backup data to be restored is an incremental backup Data identification, which determines that the backup data to be restored is the incremental backup data, including:

If the incremental backup data identifier includes the incremental backup data sequence number, it is determined that the backup data to be restored is the incremental backup data.
The method according to any one of claims 1-7, characterized in that the method further includes:

When it is determined that the backup data to be restored is full backup data, the backup data to be restored is restored according to a full data recovery method; wherein the full data recovery method refers to performing data recovery on all data in the backup data to be restored. recover.
The method according to any one of claims 1-8, characterized in that the method further includes:

When it is determined that the restored backup data has undergone data changes, the backup data to be restored is restored according to the full data recovery method; wherein the full data recovery method refers to performing all data in the backup data to be restored. Data Recovery.
A computing device, characterized in that it includes a memory and a processor; the memory is used to store program code; the processor is used to call the program code, so that the computing device executes any one of claims 1-9 method described in the item.