CN110795282B - Data rollback method, device, equipment and storage medium - Google Patents
Data rollback method, device, equipment and storage medium Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 73
- 238000013507 mapping Methods 0.000 claims description 11
- 238000004590 computer program Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
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- G06—COMPUTING; CALCULATING OR COUNTING
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- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1458—Management of the backup or restore process
- G06F11/1469—Backup restoration techniques
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1471—Saving, restoring, recovering or retrying involving logging of persistent data for recovery
Abstract
The application discloses a data rollback method, a data rollback device, data rollback equipment and a data rollback storage medium, wherein the method comprises the following steps: after receiving a rollback instruction, determining metadata to be rolled back according to a bitmap for identifying metadata modified due to data redirection; updating the metadata to be rolled back stored in the snapshot volume into the source volume according to the storage position recorded in the determined metadata to be rolled back; and resetting the identification of the bitmap to finish the rollback task. According to the method provided by the application, when data rollback is carried out, the service data in the snapshot volume does not need to be copied to the source volume, and only the metadata is copied, so that the data rollback operation can be completed quickly, the waiting time and the data copying amount needed by data rollback are greatly reduced, and the data rollback efficiency is effectively improved.
Description
Technical Field
The present invention relates to the field of storage technologies, and in particular, to a data rollback method, apparatus, device, and storage medium.
Background
For a storage system, data disaster recovery backup is the most basic function and use of the storage system, and there are many technologies and methods capable of performing data disaster recovery backup, and a snapshot is one of the commonly used and efficient data backup methods. When the data needs to be rolled back to a certain time point, the recovery can be carried out only by finding the snapshot at the time point.
At present, a common method is to copy the service data in the snapshot volume to the source volume, so as to achieve the purpose of data rollback. However, since this method requires copying of the service data, the time taken for data rollback is long, resulting in a long time for service suspension.
Therefore, how to quickly complete the data rollback operation is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of this, the present invention provides a data rollback method, apparatus, device and storage medium, which can greatly reduce the data copy amount and effectively improve the data rollback efficiency. The specific scheme is as follows:
a method of data rollback comprising:
after receiving a rollback instruction, determining metadata to be rolled back according to a bitmap for identifying metadata modified due to data redirection;
updating the metadata to be rolled back stored in the snapshot volume to a source volume according to the determined storage position recorded in the metadata to be rolled back;
and resetting the identification of the bitmap to finish the rollback task.
Preferably, in the data rollback method provided in the embodiment of the present invention, determining metadata to be rolled back according to a bitmap used for identifying metadata modified due to occurrence of data redirection specifically includes:
traversing a bitmap used for marking metadata modified due to data redirection, and finding out a bit with a changed state value;
and determining the metadata corresponding to the bit as metadata to be rolled back according to the found position of the bit.
Preferably, in the data rollback method provided in the embodiment of the present invention, updating the to-be-rolled metadata stored in the snapshot volume to the source volume includes:
and copying a first metadata block corresponding to the metadata to be rolled back stored in the snapshot volume to cover a second metadata block with the same position as the first metadata block in the source volume.
Preferably, in the data rollback method provided in the embodiment of the present invention, before receiving the rollback instruction, the method further includes:
creating an ROW snapshot for a source volume, copying metadata of the source volume to a snapshot volume, and establishing a mapping relation between the source volume and the snapshot volume;
allocating space for a bitmap identifying metadata that was modified due to the occurrence of a data redirection, according to the capacity of the metadata.
Preferably, in the foregoing data rollback method provided in the embodiment of the present invention, after the bitmap space is allocated, the method further includes:
when a write request is received, determining whether the snapshot volume is redirected before being written;
if not, writing the service data to be written in by the write request into a new storage position, updating the mapping between the logical address and the physical address in the metadata, and updating the identifier of the bitmap;
and if so, directly overwriting the service data to be written in the writing request with the old data.
Preferably, in the data rollback method provided in the embodiment of the present invention, after receiving the rollback instruction, the method further includes:
recording the progress state of the rollback task;
before the rollback task is completed, the method further comprises the following steps:
and continuously executing the rollback task according to the recorded latest rollback task progress state until the bitmap is traversed.
An embodiment of the present invention further provides a data rollback apparatus, including:
the metadata determining module is used for determining metadata to be rolled back according to a bitmap for identifying the metadata modified due to data redirection after receiving a rolling back instruction;
the metadata updating module is used for updating the metadata to be rolled back stored in the snapshot volume into the source volume according to the determined storage position recorded in the metadata to be rolled back;
and the bitmap resetting module is used for resetting the identifier of the bitmap to finish the rollback task.
Preferably, in the data rollback apparatus provided in the embodiment of the present invention, the metadata update module is specifically configured to overwrite a first metadata block copy corresponding to the metadata to be rolled back stored in the snapshot volume with a second metadata block copy having a same position as the first metadata block in the source volume according to the determined storage position recorded in the metadata to be rolled back.
The embodiment of the present invention further provides a data rollback apparatus, including a processor and a memory, where the processor implements the data rollback method provided in the embodiment of the present invention when executing a computer program stored in the memory.
The embodiment of the present invention further provides a computer-readable storage medium for storing a computer program, wherein the computer program, when executed by a processor, implements the above data rollback method provided in the embodiment of the present invention.
It can be seen from the foregoing technical solutions that, a data rollback method, apparatus, device, and storage medium provided by the present invention include: after receiving a rollback instruction, determining metadata to be rolled back according to a bitmap for identifying metadata modified due to data redirection; updating the metadata to be rolled back stored in the snapshot volume to the source volume according to the determined storage position recorded in the metadata to be rolled back; and resetting the identification of the bitmap to complete the rollback task.
In the data rollback method provided by the invention, when data rollback is performed, the service data in the snapshot volume does not need to be copied to the source volume, and only the metadata is updated, so that the data rollback operation can be quickly completed, the waiting time and the data copying amount required by data rollback are greatly reduced, and the data rollback efficiency is effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flowchart of a data rollback method according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating creation of a ROW snapshot in a data rollback method according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a new data writing process in the data rollback method according to an embodiment of the present invention;
fig. 4 is another schematic diagram illustrating a new data write in the data rollback method according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating that metadata to be rolled back is determined in the data rollback method according to the embodiment of the present invention;
fig. 6 is a schematic diagram of updating a source volume and resetting a bitmap identifier in a data rollback method according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a data rollback apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a data rollback method, as shown in fig. 1, comprising the following steps:
s101, after receiving a rollback instruction, determining metadata to be rolled back according to a bitmap for identifying metadata modified due to data redirection;
in actual operation, data redirection refers to service data redirection, that is, the physical storage location of data changes, metadata stores the mapping relationship from the logical address to the physical address, the content of the metadata changes, the storage location does not change, and only the metadata with changed content needs to be rolled back when rolling back.
S102, updating the metadata to be rolled back stored in the snapshot volume to a source volume according to the storage position recorded in the determined metadata to be rolled back;
it should be understood that, when storing the service data in the hard disk, the service data are divided into small data blocks for distributed storage, so that it is necessary to record the storage address, data length, etc. of all the data blocks to access the service data again, and the metadata in the present invention refers to data describing the information of the storage address, data length, etc. of the service data, and the storage location of the metadata can be determined according to the starting address and offset (the number of) of the metadata storage space.
S103, resetting the bitmap identification and completing the rollback task.
In the data rollback method provided in the embodiment of the present invention, after receiving a rollback instruction, first, metadata to be rolled back is determined according to a bitmap for identifying metadata modified due to occurrence of data redirection; then according to the storage position recorded in the determined metadata to be rolled back, updating the metadata to be rolled back stored in the snapshot volume into the source volume; and finally, resetting the identifier of the bitmap to finish the rollback task. Therefore, when data rollback is carried out, the service data in the snapshot volume does not need to be copied to the source volume, and the data rollback operation can be completed quickly only by updating the metadata, so that the waiting time and the data copy quantity required by data rollback are greatly reduced, and the data rollback efficiency is effectively improved.
In specific implementation, in the data rollback method provided in the embodiment of the present invention, before the step S101 is executed and a rollback instruction is received, the method may further include the steps of: creating a Redirect-on-write (ROW) snapshot for the source volume, copying metadata of the source volume to the snapshot volume, and establishing a mapping relationship between the source volume and the snapshot volume; space is allocated for the bitmap that identifies the metadata that was modified due to the occurrence of the data redirection, according to the capacity of the metadata. As shown in fig. 2, when creating a volume, the volume may allocate the capacity of metadata, such as a metadata block 6-8 Byte, and manage a service data 256KB; the bitmap space may then be allocated according to the capacity of the metadata, with 1bit in the bitmap identifying the state of one metadata block, the first bit shown in FIG. 2 identifying the first metadata block, and so on. It should be noted that, the metadata records the storage locations of the data, and each metadata records a mapping relationship between a logical address and a physical address of a data block.
Further, in a specific implementation, in the data rollback method provided in the embodiment of the present invention, after the bitmap space is allocated, the method may further include the following steps: when a write request is received, determining whether the snapshot volume is redirected before being written; if not, writing the service data to be written in the writing request into a new storage position, updating the mapping between the logical address and the physical address in the metadata, and updating the identifier of the bitmap; if yes, the service data which is ready to be written by the write request is directly overwritten on the old data. As shown in fig. 3, when new data a' is written, it is detected that a ROW snapshot exists but data redirection does not occur, data a is not overwritten, and a mapping relationship between a logical address and a physical address in metadata is updated, and a corresponding bitmap identification is updated. As shown in fig. 4, when a new data a ″ is written, it is detected that there is a ROW snapshot and a data redirection has occurred, the data redirection is not performed again, but the old data a' is directly overwritten.
In specific implementation, in the data rollback method provided in the embodiment of the present invention, step S101 determines, according to a bitmap used for identifying metadata modified due to occurrence of data redirection, metadata to be rolled back, which may specifically include: firstly, traversing a bitmap for marking metadata modified due to data redirection, and finding out a bit with a changed state value; and then, according to the position of the bit which is found out, determining the metadata corresponding to the bit as metadata to be rolled back. It should be noted that, when the bit state value is initially 0, it is changed to 1; when the bit state value is initially 1 and changes to 0, the rule can be determined according to actual conditions. As shown in fig. 5, when snapshot rollback is to be performed, a bitmap is traversed to find a bit whose state value changes, and which metadata block needs to be rolled back can be determined according to the position of the bit, and fig. 5 shows that the bit whose state value becomes 1 is specifically located at the first position, and therefore the metadata block located at the first position needs to be rolled back.
Further, in specific implementation, in the data rollback method provided in the embodiment of the present invention, the step S102 updates the metadata to be rolled back, stored in the snapshot volume, to the source volume, and specifically may include: and copying a first metadata block corresponding to the metadata to be rolled back stored in the snapshot volume to cover a second metadata block with the same position as the first metadata block in the source volume. As shown in fig. 6, the copy of the metadata block located at the first location in the snapshot volume is overlaid on the metadata block also located at the first location in the source volume.
In specific implementation, in the data rollback method provided in the embodiment of the present invention, after receiving the rollback instruction, the method may further include: recording the progress state of the rollback task; before the rollback task is completed, the method further comprises the following steps: and continuously executing the rollback task according to the recorded latest rollback task progress state until the bitmap is traversed. Thus, the rollback operation can be completed after the whole bitmap is traversed.
Based on the same inventive concept, embodiments of the present invention further provide a data rollback apparatus, and since the principle of solving the problem by the data rollback apparatus is similar to that of the aforementioned data rollback method, the implementation of the data rollback apparatus may refer to the implementation of the data rollback method, and repeated parts are not described again.
In specific implementation, as shown in fig. 7, the data rollback apparatus provided in the embodiment of the present invention specifically includes:
the metadata determining module 11 is configured to determine, after receiving the rollback instruction, to-be-rolled metadata according to a bitmap used to identify metadata that is modified due to occurrence of data redirection;
the metadata updating module 12 is configured to update the metadata to be rolled back stored in the snapshot volume to the source volume according to the storage location recorded in the determined metadata to be rolled back;
and the bitmap resetting module 13 is used for resetting the identifier of the bitmap and completing the rollback task.
In the data rollback device provided by the embodiment of the invention, the ROW snapshot rollback can be realized through the interaction of the three modules, the copy data amount is small, the data rollback time is shortened, the data rollback efficiency is effectively improved, and the product competitiveness is improved.
Further, in a specific implementation, in the data rollback method provided in the embodiment of the present invention, the metadata update module 12 may be specifically configured to copy, according to the determined storage location recorded in the metadata to be rolled back, the first metadata block corresponding to the metadata to be rolled back stored in the snapshot volume to cover the second metadata block having the same location as the first metadata block in the source volume.
For more specific working processes of the modules, reference may be made to corresponding contents disclosed in the foregoing embodiments, and details are not repeated here.
Correspondingly, the embodiment of the invention also discloses data rollback equipment, which comprises a processor and a memory; wherein the processor implements the data rollback method disclosed in the foregoing embodiments when executing the computer program stored in the memory.
For more specific processes of the above method, reference may be made to corresponding contents disclosed in the foregoing embodiments, and details are not repeated here.
Further, the present invention also discloses a computer readable storage medium for storing a computer program; the computer program, when executed by a processor, implements the data rollback method disclosed above.
For more specific processes of the method, reference may be made to corresponding contents disclosed in the foregoing embodiments, and details are not repeated here.
In the present specification, the embodiments are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same or similar parts between the embodiments are referred to each other. The device, the equipment and the storage medium disclosed by the embodiment correspond to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The embodiment of the invention provides a data rollback method, a data rollback device, data rollback equipment and a data rollback storage medium, wherein the data rollback method comprises the following steps: after receiving a rollback instruction, determining metadata to be rolled back according to a bitmap for identifying metadata modified due to data redirection; updating the metadata to be rolled back stored in the snapshot volume to the source volume according to the determined storage position recorded in the metadata to be rolled back; and resetting the identification of the bitmap to complete the rollback task. When the data rollback is carried out, the service data in the snapshot volume does not need to be copied to the source volume, and the data rollback operation can be quickly finished only by updating the metadata, so that the waiting time and the data copying amount required by the data rollback are greatly reduced, and the data rollback efficiency is effectively improved.
Finally, it should also be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The data rollback method, apparatus, device and storage medium provided by the present invention are described in detail above, and a specific example is applied in the present document to explain the principle and the implementation of the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (7)
1. A method of data rollback, comprising:
creating an ROW snapshot for a source volume, copying metadata of the source volume to a snapshot volume, and establishing a mapping relation between the source volume and the snapshot volume;
allocating space for a bitmap identifying metadata modified due to the occurrence of data redirection, according to the capacity of the metadata;
after receiving a rollback instruction, determining metadata to be rolled back according to a bitmap used for identifying metadata modified due to data redirection;
copying a first metadata block corresponding to the metadata to be rolled back stored in the snapshot volume to cover a second metadata block with the same position as the first metadata block in the source volume according to the determined storage position recorded in the metadata to be rolled back;
and resetting the identifier of the bitmap to finish the rollback task.
2. The method of claim 1, wherein determining the metadata to be rolled back based on a bitmap used to identify the metadata that was modified due to the occurrence of the data redirection comprises:
traversing a bitmap used for marking metadata modified due to data redirection, and finding out a bit with a changed state value;
and determining the metadata corresponding to the bit as metadata to be rolled back according to the found position of the bit.
3. The data rollback method of claim 2, after allocating the bitmap space, further comprising:
when a write request is received, determining whether the snapshot volume is redirected before writing;
if not, writing the service data to be written in by the write request into a new storage position, updating the mapping between the logical address and the physical address in the metadata, and updating the identifier of the bitmap;
and if so, directly overwriting the service data to be written in the writing request with the old data.
4. The data rollback method according to claim 3, further comprising, after receiving the rollback instruction:
recording the progress state of the rollback task;
before the rollback task is completed, the method further comprises the following steps:
and continuously executing the rollback task according to the recorded latest rollback task progress state until the bitmap is traversed.
5. A data rollback apparatus, comprising:
the system comprises a metadata determining module, a snapshot generating module and a mapping module, wherein the metadata determining module is used for creating an ROW snapshot for a source volume, copying the metadata of the source volume to a snapshot volume and establishing a mapping relation between the source volume and the snapshot volume; allocating space for a bitmap identifying metadata that has been modified due to the occurrence of a data redirection, according to the capacity of the metadata; after receiving a rollback instruction, determining metadata to be rolled back according to a bitmap used for identifying metadata modified due to data redirection;
the metadata updating module is used for copying a first metadata block corresponding to the metadata to be rolled back stored in the snapshot volume to cover a second metadata block with the same position as the first metadata block in the source volume according to the determined storage position recorded in the metadata to be rolled back;
and the bitmap resetting module is used for resetting the identifier of the bitmap to complete the rollback task.
6. A data rollback apparatus comprising a processor and a memory, wherein the processor, when executing a computer program stored in the memory, implements the data rollback method of any of claims 1-4.
7. A computer-readable storage medium for storing a computer program, wherein the computer program, when executed by a processor, implements a data rollback method according to any one of claims 1-4.
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| CN113448772B (en) * | 2020-11-23 | 2023-08-11 | 北京新氧科技有限公司 | Method and device for rolling back refined data |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101561773A (en) * | 2009-06-03 | 2009-10-21 | 成都市华为赛门铁克科技有限公司 | Method for recovering disk data and device thereof |
| CN106055431A (en) * | 2016-05-30 | 2016-10-26 | 河海大学 | Data backup and recovery method and data backup and recovery device based on snapshot online rollback |
| CN110018996A (en) * | 2018-07-23 | 2019-07-16 | 郑州云海信息技术有限公司 | A kind of the snapshot rollback method and relevant apparatus of distributed memory system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101561773A (en) * | 2009-06-03 | 2009-10-21 | 成都市华为赛门铁克科技有限公司 | Method for recovering disk data and device thereof |
| CN106055431A (en) * | 2016-05-30 | 2016-10-26 | 河海大学 | Data backup and recovery method and data backup and recovery device based on snapshot online rollback |
| CN110018996A (en) * | 2018-07-23 | 2019-07-16 | 郑州云海信息技术有限公司 | A kind of the snapshot rollback method and relevant apparatus of distributed memory system |
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