CN110457163A - A kind of data reconstruction method, device and the storage medium of distributed block storage - Google Patents
A kind of data reconstruction method, device and the storage medium of distributed block storage Download PDFInfo
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- 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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- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/0614—Improving the reliability of storage systems
- G06F3/0619—Improving the reliability of storage systems in relation to data integrity, e.g. data losses, bit errors
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- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
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- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/067—Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
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- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/0671—In-line storage system
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Abstract
The invention discloses data reconstruction method, device and the storage mediums of a kind of storage of distributed block.Wherein, a kind of data reconstruction method of distributed block storage is the following steps are included: S1, the element storing unit file set for reading the disk of storage server and obtaining block storage equipment mirror image, to the redundant file duplicate removal in the storage unit file set；S2, the storage unit file in the storage unit file set is not up to storage unit file size maximum value carry out write zero padding；Logically sequence of addresses is successively renamed S3 storage unit file by number, reads storage unit file according to stripe unit size and strip width and new image file is written；S4, the new image file is restored to described piece of storage equipment.By reading storage unit file set, and duplicate removal is carried out to storage unit file, writes Z-operation and recombination, solved the data of distributed block storage in catastrophe situations and restore, guarantee the safety of data.
Description
Technical field
The present invention relates to technical field of data storage, especially a kind of data reconstruction method, the device of distributed block storage
And storage medium.
Background technique
Distributed storage is a kind of data storage technology, empty by the disk on every machine in Web vector graphic enterprise
Between, and the storage resource of these dispersions is constituted into a virtual storage equipment, each angle for being stored in enterprise of data dispersion
It falls.
The key technology of distributed storage is data metadata management, storage system resilient expansion technology, fault self-recovery, deposits
Performance technologies etc. are stored up to meet storage system High Availabitity, highly reliable and high-performance.According to storage protocol classification, distributed storage can
It is divided into distributed file system, distributed block storage and distributed objects storage.Distributed block storage is always by continuous in logic
Image file composition, image file is dispersed on different physical disks according to storage unit and copy number.It is read to improve
The parallel efficiency write, general distributed block memory image group organization data in a manner of striping.
In data age, distributed block storage is the infrastructure in cloud storage.Block device passes through IP-SAN or FC-SAN
Service is provided for application, wherein the application scenarios of block storage are mainly that cloud host provides that virtualization storage, this is with regard to inevitable requirement point
The Information Security of cloth storage is able to carry out data recovery under various failures and disaster.Under generic failure, due to distribution
Storage is that the capacity datas such as with uniformity, more copies, fault self-recovery can be restored automatically.But in extreme or specific disaster scenario
Under, burst such as metadata is lost, operating system or storage software are run quickly, when part hard disc data is lost if in hard disk data it is difficult
To restore.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
One purpose is to provide data reconstruction method, device and the storage medium of a kind of distributed block storage, advantageously accounts for distribution
The data of block storage in catastrophe situations are restored, and guarantee the safety of data.
For this purpose, the first purpose of the invention is to provide a kind of data reconstruction methods of distributed block storage.
The technical scheme adopted by the invention is that:
In a first aspect, the present invention provides a kind of data reconstruction method of distributed block storage, comprising the following steps:
S1, the disk for reading storage server and the element storing unit file set for obtaining block storage equipment mirror image, to institute
State the redundant file duplicate removal in storage unit file set；
S2, the storage unit file in the storage unit file set is not up to storage unit file size maximum value
It carries out writing zero padding；
Logically sequence of addresses is successively renamed S3 storage unit file by number, according to stripe unit size and
Strip width reads storage unit file and new image file is written；
S4, the new image file is restored to described piece of storage equipment.
Further, the S1 the following steps are included:
S11, the disk for reading storage server simultaneously obtain the element storing unit file set that equipment mirror image is stored from block；
S12, it is divided into one group for the storage unit file size in storage unit file set is identical；
S13, the logical address of the storage unit file of same group of size is compared, it will if logical address repeats
The storage unit file for repeating logical address is deleted.
Further, the S3 the following steps are included:
S31, according to the size relation of the storage unit file set and the storage unit file, calculate described in reading
The number M of storage unit file set calculates reading storage according to the size relation of the storage unit file and stripe cell
The number Q of unit file；
S32, file successively is read according to strip width K and the stripe unit size from storage unit file and is write
Enter to new image file, repeats this process Q times；
S33, remaining storage unit file is read according to the S32 step, and repeated M times, and described deposit remaining
Storage unit file is written to new image file.
Further, the S4 the following steps are included:
S41, the new image file is mapped to local winding equipment, then is mounted to local directory；
S42, the data in the new image file are accessed with filesystem manner.
Further, the S4 the following steps are included:
S41, the new image file is mapped to local winding equipment；
The access protocol that S42, the winding equipment store equipment according to described piece exports, and accesses the number of new image file
According to.
Second aspect, the present invention provide a kind of Data Recapture Unit of distributed block storage, comprising:
Deduplication module is obtained, for obtaining the storage unit file set in block storage equipment, the storage unit text that will acquire
Part concentrates duplicate storage unit file to delete, and only retains a complete storage unit file set；
Preprocessing module, for being not up to writing for the storage unit file maximum value to the storage unit file
Z-operation, and logically address successively carries out renaming number to the storage unit file；
Module is assembled, for storage unit file in the preprocessing module to be reassembled into new image file；
Recovery module, for restoring the new image file to described piece of storage equipment.
Further, the acquisition deduplication module includes:
Acquiring unit, for reading the disk of storage server and obtaining the storage unit file set in block storage equipment,
Storage unit file in storage unit file set is grouped according to identical file size；
Duplicate removal unit, the logical address for the storage unit file to same group is compared, and logical address is identical
Storage unit file is deleted.
Further, the assembling module includes:
The assembling module includes:
Read computing unit, for according to the storage unit file set size and the storage unit file size most
Big value calculates the number M for reading the storage unit file set, according to storage unit file size and stripe cell it is big
It is small, calculate the number Q for reading storage unit file；
Writing unit, for reading file according to stripe unit size and strip width K from storage unit file and being written
Into new image file, to form new image file.
Further, the recovery module includes:
Map unit, for the new image file to be mapped to local winding equipment, local winding equipment carry is local
Catalogue；
Access unit, for accessing data with filesystem manner.
A kind of computer readable storage medium, the computer-readable recording medium storage have computer executable instructions,
The computer executable instructions are for making computer execute such as method described in any one of claim 1 to 5.
The beneficial effects of the present invention are:
The data that the present invention stores the storage unit file of equipment by obtaining block from disk, and it is single to storage is collected into
Meta file collection is pre-processed, and pretreatment includes writing zero padding, duplicate removal, renumbering for storage unit file, then according to band
Unit and strip width carry out the re-assemble of storage unit file, finally recover original storage unit file.To provide
A kind of distributed block, which is stored in storage system software, runs quickly and bursts etc. under disasters, can efficiently and accurately carry out the side of data recovery
Method.
Detailed description of the invention
Fig. 1 is the structural block diagram of the embodiment of the present invention one and embodiment two；
Fig. 2 is the flow chart of the embodiment of the present invention one and embodiment two；
Fig. 3 is the flow chart of step S3 in the embodiment of the present invention one and embodiment two.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
Embodiment one: referring to Fig.1, the invention discloses a kind of Data Recapture Units of distributed block storage, comprising: obtains
Deduplication module 1, preprocessing module 2, assembling module 3 and recovery module 4 obtain deduplication module 1 for obtaining block storage equipment
In storage unit file set, duplicate storage unit file is deleted in the storage unit file set that will acquire, and is only retained a
Complete storage unit file set；Preprocessing module 2 is for being not up to storage unit file maximum value to storage unit file
It carries out writing Z-operation, and logically address successively carries out renaming number to storage unit file；Assembling module 3 is used for will be pre-
Storage unit file is reassembled into new image file in processing module 2, and recovery module 4 is used to new image file being restored to block
Store equipment.
It is stored in equipment by obtaining the disk of the reading storage server of deduplication module 1 and obtaining distributed storage in block
Storage unit file is deleted storage unit file extra in storage unit file set to obtain a complete storage
Unit file collection, then the storage unit file of similar empty file is carried out writing spot patch and is filled, by being carried out to storage unit file
It writes spot patch and is filled with and prevent empty file data is caused not restore.It writes and storage unit file is carried out according to patrolling after spot patch is filled
It collects sequence and carries out renaming number, assembling module 3 re-assemblies the storage unit file set for writing zero padding and recodification
To obtain new image file, and new image file is restored to original piece of storage equipment, in order to the direct access number of user
According to.It provides a kind of distributed block and is stored in storage system software and runs quickly and burst etc. under disasters, can efficiently and accurately carry out data
The device of recovery.
Obtaining deduplication module 1 includes acquiring unit and duplicate removal unit, for reading disk and the acquisition of storage server
Block stores the storage unit file set in equipment, and the storage unit file in storage unit file set is big according to identical file
Small to be grouped, duplicate removal unit, the logical address for the storage unit file to same group is compared, and logical address is identical
Storage unit file delete.The data processing of duplicate removal unit is as follows: initialization HashMap<md5, count>, d5 indicates file
Md5 value, count indicates the number of identical md5 value；Traversal calculates the md5 value of subclass file, if md5's is a in hashmap
Number count > 1, then it represents that current file is redundant file, and file is done delete operation；If in hashmap not including the md5 value,
Then md5 value is added in hashmap, count=1.
Assembling module 3 includes reading computing unit and writing unit, reads computing unit and is used for according to storage unit text
The maximum value calculation of part collection size and storage unit file size goes out to read the number M of storage unit file set, single according to storage
The size of meta file and the size of stripe cell, calculate the number Q for reading storage unit file, and writing unit is used for from storage
Unit file reads file according to stripe unit size and is written in new image file.
It reads computing unit and passes through storage unit file set size divided by storage unit file size maximum value to be read
The number M of storage unit file set is taken, then passes through storage unit file size divided by stripe cell file size to be read
The number of storage unit file, wherein band is the data block for continuous data being divided into same size, every segment data point
It is not written to the method for the different storage unit files in the different disk in distributed type assemblies.Stripe cell: band is referred to
Size, be also stripe size.This parameter refers to the size of the strip data block write on every piece of disk.Data block size
Generally between 16KB to 512KB (or bigger), numerical value is 2 power, i.e. 16KB, and 32KB, 64KB, 128KB is in this way.Item
The bin number that bandwidth: referring to while can concurrently read or write.This quantity is equal to the storage unit number of concurrent operations.Example
Such as a distributed block equipment mirror image by striping, stripe size 256KB, strip width 8, in data reading operation
When, 8 storage units are concurrently read, reading size every time is 256KB.Increase strip width, the read-write of block device can be increased
Performance.Reason also increases the bin number that can while concurrently read or write it is obvious that increase more hard disks.Write-in is single
It is first first successively to read file according to stripe unit size and strip width from storage unit file and disposable according to strip width
Multiple storage units can be read and be written to new storage unit file, further according to a storage unit file and band list
The size of member forms new image file repeatedly to read, and repeats the process Q times, then reads remaining N-K storage unit text
Part reads write-in again and repeats M times, to obtain new image file.
Recovery module 4 includes map unit and access unit, and map unit is used to new image file being mapped to local
Winding equipment, local winding equipment carry local directory, carry refer to by operating system make a storage equipment (such as hard disk,
CD-ROM or shared resource) on computer documents and a mistake being accessed for user by the file system of computer of catalogue
Journey.Access unit is used to access data with filesystem manner.New image file is mapped to local winding equipment by map unit
Then being mounted to local directory, then access unit is accessed with filesystem manner, so that data be made to restore efficient.
Embodiment two: being with one difference of embodiment, and recovery module 4 includes lead-out unit and access unit, and export is single
For member for new image file to be mapped to local winding equipment and is exported according to the access protocol of original piece of storage equipment, access is single
Member is for accessing derived data.The block storage device access agreement after mapping is exported by lead-out unit, then access is single
Member exports data, to keep data recovery operation simply and efficient.
Referring to Fig. 2, the invention discloses a kind of data reconstruction methods of distributed block storage, comprising the following steps:
S1, the disk for reading storage server simultaneously obtain the element storing unit file set of block storage equipment mirror image, to depositing
Redundant file duplicate removal in storage unit file set；
S2, the progress that the storage unit file in storage unit file set is not up to storage unit file size maximum value
Write zero padding；
Logically sequence of addresses is successively renamed S3 storage unit file by number, according to stripe unit size and
Strip width reads storage unit file and new image file is written；
S4, new image file is restored to block storage equipment.
The storage unit file set for storing equipment by obtaining block from the disk of all storage servers, and to being collected into
Storage unit file in storage unit file set is pre-processed, wherein pretreatment includes the storage unit of similar empty file
File writes zero padding, extra storage unit file is deleted, logically sequence renumbers to storage unit file, then according to
The strip parameter of block storage equipment is last extensive to the stripe cell and strip width progress data recombination dress in storage unit file
The distributed block storing data for appearing again original is run quickly the disasters such as burst to provide a kind of distributed block and be stored in storage system software
Under, data reconstruction method efficiently and accurately.
S1 is the following steps are included: S11, the disk for reading storage server and acquisition are deposited from block storage the original of equipment mirror image
Storage unit file set；
S12, it is divided into one group for the storage unit file size in storage unit file set is identical；
S13, the logical address of the storage unit file of same group of size is compared, it will if logical address repeats
The storage unit file for repeating logical address is deleted, and as follows for the processing method of duplicate storage unit file: initialization
HashMap<md5, count>, md5 indicates the md5 value of file, and count indicates the number of identical md5 value；Traversal calculates subclass
The md5 value of file, if in hashmap md5 number count > 1, then it represents that current file is redundant file, and file is deleted
Operation；If not including the md5 value in hashmap, md5 value is added in hashmap, count=1.By by original list
After metadata file set is grouped by size, then same group of the identical storage unit file of logical address is deleted
A storage unit file is left behind, prevents duplicate storage unit file residual from causing Data duplication and data is caused to restore wrong
Accidentally, and then the accuracy that data are restored is improved.
As shown in figure 3, S3 the following steps are included:
S31, according to the size relation of storage unit file set and storage unit file, calculate and read storage unit file
The number M of collection calculates the number Q for reading storage unit file according to the size relation of storage unit file and stripe cell；
S32, file successively is read according to strip width K and stripe unit size from storage unit file and is written to
New image file repeats this process Q times；
S33, remaining storage unit file is read according to S32 step, and repeated M times, and remaining storage unit is literary
Part is written to new image file.
It obtains reading storage unit divided by the size of storage unit file by the size according to storage unit file set
The number of file set obtains the reading of storage unit file further according to the size of storage unit file divided by stripe unit size
Number successively reads file according to stripe unit size from storage file first and is written in new image file, and each deposits
Storage unit file, which is read, repeats Q times a new image file to be written completely, then also by the storage unit text of remaining N-K
Part reads according to stripe unit size and strip width and is written in new image file, is K in the present embodiment strip width
The data that namely disposably can concurrently read K storage unit, and read stripe unit size every time enter new mirror image text
Part is finally obtained new image file and is repeated to read write-in M times due to the relationship of storage unit file size and stripe unit size
To form complete new image file, so in the present embodiment, needing concurrently to read K when reading data into new image file
A storage unit, and reading size every time is 256KB, and can both have been read a storage unit file for repetition reading Q times complete
As new image file, so that storage unit file data be made to restore quickly and complete.
S4 is mounted to local directory the following steps are included: S41, new image file is mapped to local winding equipment；
S42, the data in new image file are accessed with filesystem manner, to make data convert to local memory device
It is simple and efficient.
Embodiment two: being with one difference of embodiment, and S4 is the following steps are included: S41, by new image file be mapped to local
Winding equipment；
S42, winding equipment are exported according to the access protocol of block storage equipment, access the data of new image file.
Image file collection after recovery causes after being mapped to local winding equipment according to original piece of storage device access agreement,
Data are directly accessed, keep data convert simple to the operation of local device.
A kind of computer readable storage medium, computer-readable recording medium storage have computer executable instructions, calculate
Machine executable instruction is for making computer execute S1-S4 step.
It is to be illustrated to preferable implementation of the invention, but the invention is not limited to the implementation above
Example, those skilled in the art can also make various equivalent variations on the premise of without prejudice to spirit of the invention or replace
It changes, these equivalent deformations or replacement are all included in the scope defined by the claims of the present application.
Claims (10)
1. a kind of data reconstruction method of distributed block storage, which comprises the following steps:
S1, the disk for reading storage server and the element storing unit file set for obtaining block storage equipment mirror image, are deposited to described
Redundant file duplicate removal in storage unit file set；
S2, the progress that the storage unit file in the storage unit file set is not up to storage unit file size maximum value
Write zero padding；
Logically sequence of addresses is successively renamed S3 storage unit file by number, according to stripe unit size and band
Width reads storage unit file and new image file is written；
S4, the new image file is restored to described piece of storage equipment.
2. a kind of data reconstruction method of distributed block storage according to claim 1, which is characterized in that the S1 includes
Following steps:
S11, the disk for reading storage server simultaneously obtain the element storing unit file set that equipment mirror image is stored from block；
S12, it is divided into one group for the storage unit file size in storage unit file set is identical；
S13, the logical address of the storage unit file of same group of size is compared, will be repeated if logical address repeats
The storage unit file of logical address is deleted.
3. a kind of data reconstruction method of distributed block storage according to claim 1 or 2, which is characterized in that the S3
The following steps are included:
S31, according to the size relation of the storage unit file set and the storage unit file, calculate and read the storage
The number M of unit file collection calculates reading storage unit according to the size relation of the storage unit file and stripe cell
The number Q of file；
S32, file successively is read according to strip width K and the stripe unit size from storage unit file and is written to
New image file repeats this process Q times；
S33, remaining storage unit file is read according to the S32 step, and repeated M times, and the remaining storage is single
Meta file is written to new image file.
4. a kind of data reconstruction method of distributed block storage according to claim 1 or 2, which is characterized in that the S4
The following steps are included:
S41, the new image file is mapped to local winding equipment, then is mounted to local directory；
S42, the data in the new image file are accessed with filesystem manner.
5. a kind of data reconstruction method of distributed block storage according to claim 1 or 2, which is characterized in that the S4
The following steps are included:
S41, the new image file is mapped to local winding equipment；
The access protocol that S42, the winding equipment store equipment according to described piece exports, and accesses the data of new image file.
6. a kind of Data Recapture Unit of distributed block storage characterized by comprising
Deduplication module is obtained, for obtaining the storage unit file set in block storage equipment, the storage unit file set that will acquire
In duplicate storage unit file delete, only retain a complete storage unit file set；
Preprocessing module, for the storage unit file be not up to the storage unit file maximum value carry out write zero behaviour
Make, and logically address successively carries out renaming number to the storage unit file；
Module is assembled, for storage unit file in the preprocessing module to be reassembled into new image file；
Recovery module, for restoring the new image file to described piece of storage equipment.
7. a kind of Data Recapture Unit of distributed block storage according to claim 6, which is characterized in that the acquisition is gone
Molality block includes:
Acquiring unit will be deposited for reading the disk of storage server and obtaining the storage unit file set in block storage equipment
Storage unit file in storage unit file set is grouped according to identical file size；
Duplicate removal unit, the logical address for the storage unit file to same group are compared, by the identical storage of logical address
Unit file is deleted.
8. a kind of Data Recapture Unit of distributed block storage according to claim 6 or 7, which is characterized in that described group
Die-filling piece includes:
Computing unit is read, for the maximum value according to the storage unit file set size and the storage unit file size
The number M for reading the storage unit file set is calculated, according to the size of storage unit file and the size of stripe cell, meter
Calculate the number Q for reading storage unit file；
Writing unit, for reading file according to stripe unit size and strip width K from storage unit file and being written to new
In image file, to form new image file.
9. a kind of Data Recapture Unit of distributed block storage according to claim 7, which is characterized in that the recovery mould
Block includes:
Map unit, for the new image file to be mapped to local winding equipment, local winding equipment carry local directory；
Access unit, for accessing data with filesystem manner.
10. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has computer can
It executes instruction, the computer executable instructions are for making computer execute such as method described in any one of claim 1 to 5.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114564456A (en) * | 2022-03-03 | 2022-05-31 | 北京天融信网络安全技术有限公司 | Distributed storage file recovery method and device |
| CN117971774A (en) * | 2024-03-29 | 2024-05-03 | 苏州元脑智能科技有限公司 | File set recovery method, apparatus, computer device, medium and program product |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114564456A (en) * | 2022-03-03 | 2022-05-31 | 北京天融信网络安全技术有限公司 | Distributed storage file recovery method and device |
| CN114564456B (en) * | 2022-03-03 | 2022-09-23 | 北京天融信网络安全技术有限公司 | Distributed storage file recovery method and device |
| CN117971774A (en) * | 2024-03-29 | 2024-05-03 | 苏州元脑智能科技有限公司 | File set recovery method, apparatus, computer device, medium and program product |
| CN117971774B (en) * | 2024-03-29 | 2024-06-07 | 苏州元脑智能科技有限公司 | File set recovery method, apparatus, computer device, medium and program product |
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