CN102693173A - File processing method based on snapshot and solid state disk with snapshot function - Google Patents
File processing method based on snapshot and solid state disk with snapshot function Download PDFInfo
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- CN102693173A CN102693173A CN2012101493149A CN201210149314A CN102693173A CN 102693173 A CN102693173 A CN 102693173A CN 2012101493149 A CN2012101493149 A CN 2012101493149A CN 201210149314 A CN201210149314 A CN 201210149314A CN 102693173 A CN102693173 A CN 102693173A
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- file
- backup
- snapshot
- physical address
- mapping table
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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
- G06F11/1446—Point-in-time backing up or restoration of persistent data
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2201/00—Indexing scheme relating to error detection, to error correction, and to monitoring
- G06F2201/84—Using snapshots, i.e. a logical point-in-time copy of the data
Abstract
The invention is suitable for the technical field of computers, and provides a file processing method based on snapshot. The method comprises the following steps of receiving a file backup command; building a mapping table from a logic address to a physical address, which is used by the file at present; receiving a file backup recovery command; and storing the mapping table from the logic address to the physical address, which is used by an appointed backup of the file, to the mapping table from the logic address to the physical address, which is used at present. Preferentially, if the file has constant data before and after being operated, a corresponding first snapshot produced before the file is operated and a corresponding second snapshot produced after the file is operated share the physical address of the data. Therefore, according to the method, the file can be conveniently backed up and restored, and all backups of the file can share a large quantity of constant data to save disk space.
Description
Technical field
The present invention relates to field of computer technology, relate in particular to a kind of based on the document handling method of snapshot and solid state hard disc with snapshot functions.
Background technology
The backup of file and reduction are operations very important in the computing machine use.Computer virus, maloperation etc. all possibly make file impaired, can be very important to designated state before by recovery file.The traditional document backup method normally assigned address that copies files to of active is preserved, and when need waiting the recovery file backup, file backup is copied out from this special position, thereby make the state of the content recovery of file to backup time.Mode with this copy realizes that the backup of file and the bigger problem of reduction ratio are; Each file backup all independently occupies hard drive space; And the process of backup and reduction all is the process of copy total data on hard disk, and this process often needs the long time.
The embodiment of solid state hard disc backup is as shown in Figure 1 in the prior art, and this implementation method is all to copy file to assigned address to preserve, and logical address L0, L1 and L2 are a file, corresponding physical address P0, P1 and P2.During backup this document; The content of logical address L0, L1 and L2 is copied among logical address L3, L4 and the L5, and corresponding physical address P3, P4 and P5 need to preserve file backup with the original onesize hard drive space of file like this; When needs recover backup; The content that logical address L3, L4 and L5 are deposited copies among logical address L0, L1 and the L2, realizes the recovery of file, and this implementation method significantly can take a large amount of physical spaces.
Can know that to sum up the backup of existing fixed disk file and restoration methods obviously exist inconvenience and defective, so be necessary to improve on reality is used.
Summary of the invention
To above-mentioned defective, the object of the present invention is to provide a kind ofly based on the document handling method of snapshot and solid state hard disc with snapshot functions, can realize the backup and the recovery of file easily.
To achieve these goals, the present invention provides a kind of document handling method based on snapshot, and said method comprises:
Reception file backup order;
Set up the mapping table of the logical address of the current use of said file to physical address;
The order of reception file backup recovery;
The appointment of said file is backed up the logical address of using arrives physical address to the logical address that is saved in said current use to the mapping table of physical address mapping table.
According to the document handling method based on snapshot of the present invention, said file backup realizes through storing snapshot.
According to the document handling method based on snapshot of the present invention, the logical address that said appointment backup is used arrives the identical physical address of mapping table common sparing of physical address to the mapping table of physical address and the logical address of said current use.
According to the document handling method based on snapshot of the present invention; Said file is by corresponding first snapshot of preoperative backup; Said file is by corresponding second snapshot of the backup after operating; If have constant data, the physical address of then said first snapshot and the shared said data of second snapshot before and after said file is operated.
According to the document handling method based on snapshot of the present invention, said method also comprises:
Receive the delete instruction of said file backup, delete of the appointment backup of the logical address of said file to physical address mapping table.
According to the document handling method based on snapshot of the present invention, said method also comprises:
Receive the query statement of said file backup, return all backup informations of current said file.
The present invention also provides a kind of solid state hard disc with snapshot functions, and said solid state hard disc comprises:
The file backup module is used to receive the file backup order, sets up the mapping table of the logical address of the current use of said file to physical address;
File recovers module, is used to receive the file backup recovery order, the appointment of said file is backed up the logical address of using arrives physical address to the logical address that is saved in said current use to the mapping table of physical address mapping table.
The present invention also provides a kind of solid state hard disc with snapshot functions, and said solid state hard disc has snapshot space, is used for realizing said file backup through storing snapshot.
The present invention also provides a kind of solid state hard disc with snapshot functions, and said solid state hard disc also comprises the backup removing module, is used to receive the delete instruction of said file backup, deletes the appointment backup of the logical address of said file to physical address mapping table.
The present invention also provides a kind of solid state hard disc with snapshot functions, and said solid state hard disc also comprises the backup enquiry module, is used to receive the query statement of said file backup, returns all backup informations of current said file.
The present invention realizes the quick backup and the recovery of file through the snapshot functions of solid state hard disc; Concrete, order is created in the backup that receives certain file when solid state hard disc, then directly sets up the current snapshot of corresponding this document; Be of mapping table and the preservation of the logical address of the current use of file to physical address; After file is operated,, then receive restore instruction if need return to by state before the operation; With mapping table the mapping table to the logical address that be saved in said current use to physical address of the logical address of specifying backup to use, make file return to the state of specifying backup to physical address.Better, if file has constant data before and after being operated, then this document can be saved a large amount of physical spaces whereby by first corresponding before the operating snapshot with by the physical address of the corresponding shared said data of second snapshot in operation back.
Description of drawings
Fig. 1 is the mapping table synoptic diagram of the file backup of an embodiment of the prior art;
Fig. 2 is the structural representation of the solid state hard disc that provides of one embodiment of the invention;
Fig. 3 A is the first snapshot structural representation of one embodiment of the invention;
Fig. 3 B is the second snapshot structural representation of Fig. 3 A illustrated embodiment;
Fig. 3 C is the structural representation behind Fig. 3 A illustrated embodiment first snapshot restore;
Fig. 4 A is the first snapshot structural representation of another embodiment of the present invention;
Fig. 4 B is the second snapshot structural representation of Fig. 4 A illustrated embodiment;
Fig. 4 C is the structural representation of first snapshot after the quilt of Fig. 4 A illustrated embodiment is operated;
Fig. 5 is the document handling method process flow diagram based on snapshot that one embodiment of the invention provides.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Referring to Fig. 2, the invention provides a kind of solid state hard disc with snapshot functions, this solid state hard disc 100 has storage space, is used for realizing the backup to file through the storage snapshot.In concrete the application, solid state hard disc 100 comprises:
File recovers module 20, is used to receive the file backup recovery order, the appointment of file is backed up the logical address of using arrives physical address to the logical address that is saved in said current use to the mapping table of physical address mapping table.Aforementionedly explain; For a certain file; It can have the corresponding different data mode of a plurality of backups, if the user wants that the data mode with this document returns to the state in a certain moment, then only need send through system and recover order; Call the mapping table that the logical address of specifying backup to use arrives physical address, make the mapping table of its logical address that is saved in current use to physical address.
Embodiment referring to file backup recovery shown in Fig. 3 A ~ Fig. 3 C; Fig. 3 A is first snapshot of the current use of certain file of solid state hard disc 100; Fig. 3 B is the second corresponding snapshot of corresponding identical file initial back-up; When solid state hard disc 100 received the order of recovery file backup, file recovery module 20 returned to the logical address of second snapshot shown in Fig. 3 B on first snapshot shown in Fig. 3 A to physical address mapping table, and the logical address L0 that backs up shown in Fig. 3 A, L1 and L2 be corresponding physical address P0, P1 and P2 respectively; Shown in Fig. 3 C, the file content of Fig. 3 A backup reverts to the content that backs up shown in Fig. 3 B.
Solid state hard disc of the present invention also comprises backup removing module 30 and backup enquiry module 40.In the base; Backup removing module 30 is used to receive the delete instruction of file backup; The logical address of deleted file is to the appointment backup of physical address mapping table, and backup enquiry module 40 is used to receive the query statement of file backup, returns all backup informations of current said file.
In the practical application, before and after file is operated, have only partial data to do variation usually, and most of data do not change.In view of this, identical physical address is divided in shared center between the snapshot of each backup correspondence of the present invention, can save greatly to take up room.Referring to Fig. 4 A ~ Fig. 4 C; Supposing first snapshot shown in the current use Fig. 4 of certain file A, for ease of explanation, is second snapshot of preserving backup this moment at this Fig. 4 B;, backs up again this document after being operated; Then first snapshot shown in Fig. 4 A receives write operation, and the write operation of logical address L0 is made the corresponding new physical address L3 of logical address L0 of snapshot shown in Fig. 4 A, the write operation of logical address L2 is made the corresponding new physical address L4 of logical address L2 of snapshot shown in Fig. 4 A; First snapshot is changed to the structure shown in Fig. 4 C; So after the operation to file after a while, because the partial data of file does not have variation, so first snapshot and second snapshot still have constant physical address P1.Whereby, the physical address that solid state hard disc 100 of the present invention can shared portion between a plurality of snapshots of file, thus save the part hard drive space.
Referring to Fig. 5 the present invention a kind of document handling method based on snapshot is provided, it can realize that this method comprises through solid state hard disc as shown in Figure 2:
Step S501, file backup module 10 receives the file backup order, sets up the mapping table of the logical address of the current use of said file to physical address.
File backup among the present invention realizes through the storage snapshot of solid state hard disc 100 that all a certain file corresponding snapshot of a backup is constantly preserved the mapping table of the logical address of the current use of file to physical address in the snapshot.
Step S502, file recover module 20 and receive the file backup recovery order, the appointment of file are backed up mapping table the mapping table to the logical address that be saved in said current use to physical address of the logical address of use to physical address.
In concrete the application, the operated front and back of file or a certain operation moment, this document has different data, but compares by preoperative file data, had only part to change by the file data after operating, and lot of data can not change.Therefore, when the appointment of recovery file was backed up, the mapping table of specifying the logical address that backs up use to arrive physical address can arrive the identical physical address of mapping table common sparing of physical address with the logical address of current use, saves hard drive space whereby.
Need to prove; After file backup was good, solid state hard disc 100 can receive the delete instruction of file backup, and the logical address of deleted file is to the appointment backup of physical address mapping table; Also can receive the query statement of file backup, return all backup informations of current said file.
Better, if certain file has many places backups (snapshot), such as; Corresponding first snapshot before certain file is operated; By corresponding second snapshot in operation back, if having constant data, the then physical address of first snapshot and the shared said persistent data of second snapshot before and after the operation.Whereby, the present invention not only can set up fast and recover backup, can also save big quantity space.
In sum, the present invention is through the quick backup and the recovery of the snapshot functions realization file of solid state hard disc, and is concrete; Order is created in the backup that receives certain file when solid state hard disc; Then directly set up the current snapshot of corresponding this document, i.e. the logical address of the current use of file is to the mapping table and the preservation of physical address, after file is operated; If need return to by state before the operation; Then receive restore instruction,, make file return to the state of specifying backup the mapping table of mapping table to the logical address that is saved in said current use to physical address of the logical address of specifying backup to use to physical address.Better, if file has constant data before and after being operated, then this document can be saved a large amount of physical spaces whereby by first corresponding before the operating snapshot with by the physical address of the corresponding shared said data of second snapshot in operation back.
Certainly; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (10)
1. the document handling method based on snapshot is characterized in that, said method comprises:
Reception file backup order;
Set up the mapping table of the logical address of the current use of said file to physical address;
The order of reception file backup recovery;
The appointment of said file is backed up the logical address of using arrives physical address to the logical address that is saved in said current use to the mapping table of physical address mapping table.
2. the document handling method based on snapshot according to claim 1 is characterized in that, said file backup realizes through storing snapshot.
3. the document handling method based on snapshot according to claim 1; It is characterized in that the logical address that said appointment backup is used arrives the identical physical address of mapping table common sparing of physical address to the mapping table of physical address and the logical address of said current use.
4. the document handling method based on snapshot according to claim 2; It is characterized in that; Said file is by corresponding first snapshot of preoperative backup; Said file is by corresponding second snapshot of the backup after operating, if said file has constant data, the physical address of then said first snapshot and the shared said data of second snapshot before and after being operated.
5. the document handling method based on snapshot according to claim 1 is characterized in that, said method also comprises:
Receive the delete instruction of said file backup, delete of the appointment backup of the logical address of said file to physical address mapping table.
6. the document handling method based on snapshot according to claim 1 is characterized in that, said method also comprises:
Receive the query statement of said file backup, return all backup informations of current said file.
7. the solid state hard disc with snapshot functions is characterized in that, said solid state hard disc comprises:
The file backup module is used to receive the file backup order, sets up the mapping table of the logical address of the current use of said file to physical address;
File recovers module, is used to receive the file backup recovery order, the appointment of said file is backed up the logical address of using arrives physical address to the logical address that is saved in said current use to the mapping table of physical address mapping table.
8. solid state hard disc according to claim 7 is characterized in that said solid state hard disc has snapshot space, is used for realizing said file backup through storing snapshot.
9. solid state hard disc according to claim 7 is characterized in that said solid state hard disc also comprises the backup removing module, is used to receive the delete instruction of said file backup, deletes the appointment backup of the logical address of said file to physical address mapping table.
10. solid state hard disc according to claim 7 is characterized in that said solid state hard disc also comprises the backup enquiry module, is used to receive the query statement of said file backup, returns all backup informations of current said file.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101493149A CN102693173A (en) | 2012-05-15 | 2012-05-15 | File processing method based on snapshot and solid state disk with snapshot function |
| PCT/CN2013/074923 WO2013170702A1 (en) | 2012-05-15 | 2013-04-28 | File processing method based on snapshot and solid state disk with snapshot function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101493149A CN102693173A (en) | 2012-05-15 | 2012-05-15 | File processing method based on snapshot and solid state disk with snapshot function |
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| CN102693173A true CN102693173A (en) | 2012-09-26 |
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| CN2012101493149A Pending CN102693173A (en) | 2012-05-15 | 2012-05-15 | File processing method based on snapshot and solid state disk with snapshot function |
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| WO (1) | WO2013170702A1 (en) |
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| WO2013170702A1 (en) * | 2012-05-15 | 2013-11-21 | 记忆科技(深圳)有限公司 | File processing method based on snapshot and solid state disk with snapshot function |
| CN103744718A (en) * | 2013-12-17 | 2014-04-23 | 记忆科技(深圳)有限公司 | Method and system for achieving virtual desktop |
| CN104252395A (en) * | 2013-06-28 | 2014-12-31 | 联想(北京)有限公司 | Information processing method and electronic equipment |
| CN104281505A (en) * | 2013-07-03 | 2015-01-14 | 联想(北京)有限公司 | Data backup method and device and electronic device |
| CN104915265A (en) * | 2014-03-10 | 2015-09-16 | 联想(北京)有限公司 | Data backup method and electronic equipment |
| CN106852174A (en) * | 2014-10-22 | 2017-06-13 | 慧与发展有限责任合伙企业 | The data recovery presented using block disk |
| CN110399333A (en) * | 2018-04-20 | 2019-11-01 | 伊姆西Ip控股有限责任公司 | Delete method, equipment and the computer program product of snapshot |
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| Publication number | Publication date |
|---|---|
| WO2013170702A1 (en) | 2013-11-21 |
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Application publication date: 20120926 |