CN100426247C - Data recovery method - Google Patents
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- CN100426247C CN100426247C CNB2006100012998A CN200610001299A CN100426247C CN 100426247 C CN100426247 C CN 100426247C CN B2006100012998 A CNB2006100012998 A CN B2006100012998A CN 200610001299 A CN200610001299 A CN 200610001299A CN 100426247 C CN100426247 C CN 100426247C
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000011084 recovery Methods 0.000 title claims abstract description 25
- 230000008569 process Effects 0.000 claims description 9
- 230000003716 rejuvenation Effects 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 5
- 238000012795 verification Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 17
- 238000012545 processing Methods 0.000 description 6
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Abstract
The present invention relates to a data recovery method which comprises a backup step and a recovery step, wherein a file which needs to be backed up is divided by a main computer into a plurality of data blocks which are simultaneously stored in at least one backup computer; when the data of the data blocks of the file is changed, the main computer sends the data blocks with data changes to the backup computer for backup; when data damage is detected on the main computer, the damaged data blocks are determined, and the backup data blocks are obtained from the backup computer for data recovery. When the main computer is wrong and can not operate, one backup computer is selected and set as a new main computer for accomplishing system switching. The present invention accomplishes the data backup and the recovery under the precondition that service is not stopped. Moreover, if the damaged range of the data is small, the cost of the recovery of the present invention is tiny in an omitted level.
Description
Technical field
The present invention relates to computer realm, relate in particular to a kind of data reconstruction method.
Background technology
Because computing machine has data-handling capacity and jumbo storage capacity at a high speed, therefore computing machine is widely used in the every field of productive life, as: communication, traffic, bank etc., and, a lot of computer systems need be in the state of continuous operation, so that guarantee the operate as normal of total system.For example: the pbx server of telecommunication department is in case shut down; will cause a lot of user terminals can't normal communication, the information handling system of bank card tissue is in case shut down; also can cause a large amount of holders, trade company can't carry out bank card business; make troubles to the user thus; therefore need existing computer system to have system security function preferably; particularly when primary processor breaks down, has the higher system switching capability.
In addition, in order to prevent losing of significant data on those computer systems, need back up significant data, so that when breaking down, can in time recover those significant datas.Such as, for one be the enterprise of operation means with the ecommerce, network data is the basis that enterprise depends on for existence, we can say to be exactly the life of whole enterprise.In a single day these data are damaged or are lost, and all will cause immeasurable loss to enterprise.For industries such as picture telecommunications, finance, security, that is all the more so.Thus, people begin to pay close attention to how to guarantee that the intact of data, data backup then are unique solutions.Existing data back up method mainly adopts following three kinds of technology: cold standby technology, daily record technology and RAID (RedundantArray of Inexpensive Disks, Redundant Array of Inexpensive Disc) technology.
The cardinal principle of cold standby technology is to duplicate a fully raw data and preservation, during recovery prior backed up data is duplicated back again.This method is fairly simple, be fit to the smaller occasion of data volume, when data volume is bigger, need a large amount of storage spaces to preserve, and Backup Data process and restore data process can take the processing time of a large amount of primary processors, influence the traffic handing capacity of total system, even cause the service disconnection of total system.
The daily record technology is to be representative with large-scale relevant database, for example: a kind of incremental backup technology that ORACLE adopted.The ultimate principle of this daily record technology is that to get raw data cold standby data at a time be that starting point (is called the checkpoint again, CHCEKPOINT), the data that at every turn change is recorded in the journal file.When original system is damaged, fetch the cold standby data, and redo log (REDO), after daily record was finished, data i.e. the system's of returning to moment of breaking down.Utilizing the daily record technology to carry out storage space that data backup/recovery takies is far smaller than and utilizes the cold standby technology to carry out the shared storage space of data backup/recovery.But, to utilize the daily record technology to carry out data and recover, the relation of each daily record is just as chain, and a ring set one overlaps, and one of them daily record is broken down, and will cause data to be not easy to recover.In addition, system is damaged in the time of need carrying out the data recovery, also needs usually to suspend operation or the traffic affecting processing power, the requirement that the basic enterprising line data that can not satisfy does not fully influence traffic handing capacity recovers.
The RAID technology is a kind of data redundancy technology of using the realization of hardware approach.With the RAID1 mirror image technology is example, and it uses two identical data of hard-disc storage simultaneously, and when a hard disk broke down, another piece hard disk can be taken over and work as front disk, thereby arrives the purpose of data security.But; when utilizing the RAID technology to carry out the data recovery, when the primary processor damage of whole computer system, when for example the mainboard of primary processor or CPU break down; whole computer system also can't be carried out business processing, can not realize not shutting down the purpose of managing business.
Summary of the invention
The object of the present invention is to provide a kind of data reconstruction method, carry out the technical matters that data are recovered to solve under the situation that can not satisfy interrupt system business not in the prior art.
For addressing the above problem, the invention discloses a kind of data reconstruction method, comprising: backup procedure and rejuvenation, wherein:
(1) backup procedure
(1) the principal computer file division that will need to back up becomes the plurality of data piece, and the data block of described file is kept at least one the backup computer simultaneously;
(2) after the data of the data block of described file change, principal computer is sent to the data block of described generation data variation on the described backup computer and backs up;
(2) rejuvenation
(3) when detecting the corrupted data of principal computer, determine the data block of damage, and the described backed up data piece of acquisition carries out the data recovery from described backup computer.
Step (1) principal computer is the data block that described file division is become fixed size.Each data block comprises effective length field, data block relevant information field, field CRC check sign indicating number, data division CRC check sign indicating number and data division.
Step (3) is specially:
(31) the field CRC check sign indicating number of each data block of principal computer verification, data division CRC check sign indicating number, if field CRC check sign indicating number mistake, then according to effective length field, the data block relevant information field of data block described in the effective length field of the corresponding data piece that obtains in the backup computer and the data block relevant information field replacement principal computer; If data division CRC check sign indicating number mistake, then according to the data division of data block described in the data division replacement principal computer of the corresponding data piece that obtains in the backup computer.
The corrupted data that detects principal computer in the step (3) is specially: principal computer is found mistake in the reading of data process.
The present invention also comprises: (4) when principal computer breaks down can't move the time, selects wherein a backup computer to be set to new principal computer and finishes system and switch.Backup computer is that whether whether operate as normal detects principal computer break down and can't move by continuous test principal computer.
The invention provides another kind of data reconstruction method, also comprise:
(1) backup procedure
(1) the principal computer file division that will need to back up becomes the plurality of data piece, and the data block of described file is kept at least one the backup computer simultaneously;
(2) after the data of the data block of described file change, principal computer is sent to the data block of described generation data variation on the described backup computer and backs up;
(2) rejuvenation
(3) break down can't move the time when principal computer, selecting wherein, a backup computer is set to new principal computer.
Compared with prior art, the present invention has the following advantages: data reconstruction method of the present invention is only just carried out recovery operation when reading of data makes a mistake, this process is transparent to the application software of high level, does not need the processing of interrupting service, and very little to the processing power influence of principal computer.
If the scope of corrupted data is smaller, recovery expense of the present invention can be little of negligible degree.Because most fault characteristic all is the broken parts data, unless especially big disaster is waited until in breaking out of fire, earthquake, therefore the effect of restore data of the present invention is very good.And backup of the present invention and recovery all can be set at automatically to be finished, and need not manual intervention.
Description of drawings
Fig. 1 is a theory structure synoptic diagram of realizing the computer system of the present invention of data recovery;
Fig. 2 is the process flow diagram of a kind of data reconstruction method of the present invention;
Fig. 3 is a kind of structural representation of data block;
Fig. 4 is the process flow diagram of another kind of data reconstruction method of the present invention.
Embodiment
Below in conjunction with accompanying drawing, specify the present invention.
Not stop to realize the data recovery under the professional prerequisite in order being implemented in, principal computer and at least one backup computer to be set in the computer system of the present invention.Principal computer can be a primary processor, also can be exclusively used in the computing machine of data backup.Please refer to Fig. 1, it is for realizing the theory structure synoptic diagram of the computer system of the present invention that data are recovered.It comprises principal computer 11 and some backup computer 12.Principal computer can also can pass through network (as the Internet) and connect backup computer 12 by private line access backup computer 12.Principal computer 11 and backup computer 12 can be positioned at same place, also can be positioned at the strange land.But network speed and network quality can directly influence the quality that follow-up data recovers, and the connected mode of principal computer 11 and backup computer 12 the bests is by private line access for this reason.
See also Fig. 2, it is the process flow diagram of a kind of data reconstruction method of the present invention.It comprises: the backup procedure before breaking down and break down after rejuvenation.
(1) backup procedure
S110: the file division that principal computer will need to back up becomes the plurality of data piece, and the data block of described file is kept at least one the backup computer simultaneously;
S120: after the data of the data block of described file changed, principal computer was sent to the data block of described generation data variation on the described backup computer and backs up;
(2) rejuvenation
S130: when detecting the corrupted data of principal computer, determine the data block of damage, and the described backed up data piece of acquisition carries out the data recovery from described backup computer.Below specifically introduce each step.
One, step 110
The file division that principal computer will need to back up becomes the plurality of data piece.For the ease of management, file division can be become the data block of fixed size.Certainly, the present invention is not limited to file is divided into the plurality of data piece in the mode of fixed size, also can be other partitioning scheme.
Simultaneously, consider that the follow-up data block that changes need back up, in order to improve the efficient of data backup, the data block of division is the smaller the better.But, when the data block quantity of a file is a lot, has improved the time that file management spent greatly and taken the processing resource of a large amount of principal computers.For this reason, the data block of the preferable division of principal computer size is 2k～4k.
See also Fig. 3, it is a kind of structural representation of data block.Each data block comprises effective length (Validate Size) field, data block relevant information (other Info) field, field CRC check sign indicating number (fieldCRC), data division CRC check sign indicating number (Data CRC) and data division (Data).Wherein, this data block of effective length field record realizes effective length.The out of Memory that data block relevant information field record is relevant with this data block is as fileinfo, this data block positional information hereof etc. under data block generation time, this data block.Field CRC check sign indicating number is the CRC check sign indicating number that comprises the field data of effective length field, data block relevant information.Data division is used to store the data division of this data block.Data division CRC check sign indicating number is the CRC check sign indicating number of this data division.
The structure of data block not only is confined to this, and this data block can be defined as other structure.Comprise data division and related information section as data block.Wherein data division is used to store data, and related information section is used to inform that fileinfo under this data block, this data block are in the positional information of file, data block ID number etc.
Principal computer can back up needs backed up data piece on many backup computer simultaneously.
Two, step S120
After the data of the data block of described file changed, principal computer was sent to the data block of described generation data variation on the described backup computer and backs up.
System can know whether the data block of file changes by the data of regular each file of detection, and system also can event-triggered detects the data in the file, changes in case find the data of file, then triggers backup-step.Such as, when principal computer detect file implemented some operation (as revised file, updating file etc.) after, principal computer carries out the detection of the data of this document immediately, has judged whether that data block changes.
When data block changes, can be that unit is sent to all backup computer with the data block information that all data in this document change by principal computer with the file.Backup computer is upgraded the data block data of preserving in advance according to the data block information that receives.
In order to improve the stability of system, also many backup computer can be set.When data block changed, principal computer was sent to each backup computer with those data block data and backs up.
Three, step S130
When detecting the corrupted data of principal computer, determine the data block of damage, and the described backed up data piece of acquisition carries out the data recovery from described backup computer.
Because a variety of causes, cause the corrupted data of principal computer as large tracts of land outage etc.For computer system that can not interrupt run, restore data is the task of top priority fast.
Step S130 can be by following substep specific implementation:
(31) the field CRC check sign indicating number of each data block of principal computer verification, data division CRC check sign indicating number are if field CRC check sign indicating number mistake is then carried out step (32), if data division CRC check sign indicating number mistake is then carried out step (33);
(32) according to the effective length field of the corresponding data piece that obtains in the backup computer and data block relevant information field reset effective length field, the data block relevant information field of described data block;
(33) data division of resetting described data block according to the data division of the corresponding data piece that obtains in the backup computer.
That is, under the situation of and Field crc error correct, only need from a backup computer wherein, obtain Field data (effective length field data and data block relevant information field data) and get final product at DATA CRC.At the DATA crc error and under the correct situation of Field CRC, only need from a backup computer wherein, obtain the DATA data and get final product.Under all wrong situation of the two check code, need from wherein a backup is calculated, obtain to comprise all data of data block within Field data and the DATA data.
The CRC check sign indicating number can be fast and the data of accurately judging data block whether be damaged so that from backup computer, recover the data of this data block as early as possible.
Step S130 can also pass through alternate manner except whether the data of judging data block by the CRC check sign indicating number are damaged, the present invention is not limited thereto.
In order to reduce the mutual of data on principal computer and the backup computer, can be that unit carries out data and recovers with the file.Such as, on the principal computer be whether the data that unit detects all data blocks in this document exist damage with the file, damage if exist, then the corresponding data block id information of record.Principal computer will have all data block id informations of corrupted data to be sent to a wherein backup computer in this document, the data that therefrom obtain those data blocks are upgraded the data of the respective data blocks of this document in the principal computer.
For the reliability and the rapidity that improve data interaction on principal computer and the backup computer, the data on principal computer and the backup computer preferably transmit by special line.
Data on principal computer are damaged and need to recover, computer system is also deposited the recovery of significant data in another case: when principal computer breaks down, in the time of can't moving, CPU as principal computer breaks down, this moment is not if finish system's switching, ensure the continuity of data and guarantee professional not disruptive, consequence is hardly imaginable.The present invention selects wherein a backup computer to be set to new principal computer to finish system and switch.Backup computer is that whether whether operate as normal detects principal computer break down and can't move by continuous test principal computer.
Such as, backup computer regularly sends to principal computer and detects packet, under the situation of principal computer operate as normal, can return a response data packet.When backup computer receives this response data packet in Preset Time, think that then principal computer is under the normal operating conditions at present, backup computer is not received response data packet in several sense cycle, assert that then principal computer breaks down.Backup computer is set at the IP address of original principal computer with its own IP address, thus the realization system switch, and then finish data and recover.
Data reconstruction method of the present invention is only just carried out recovery operation when reading of data makes a mistake, this process is transparent to the application software of high level, if the scope of corrupted data is smaller, recovery expense of the present invention can be little of negligible degree.Because most fault characteristic all is the broken parts data, unless especially big disaster is waited until in breaking out of fire, earthquake, therefore the effect of restore data of the present invention is very good.And backup of the present invention and recovery all can be set at automatically to be finished, and need not manual intervention.
See also Fig. 4, it is an another kind of data reconstruction method of the present invention, and it comprises:
(1) backup procedure
S210: the file division that principal computer will need to back up becomes the plurality of data piece, and the data block of described file is kept at least one the backup computer simultaneously;
S220: after the data of the data block of described file changed, principal computer was sent to the data block of described generation data variation on the described backup computer and backs up;
(2) rejuvenation
S230: when principal computer breaks down can't move the time, selecting wherein, a backup computer is set to new principal computer.
Above-mentioned steps S210 is identical substantially with disclosed S110, S120 with S220, has just repeated no more at this.
Data of the present invention are recovered to be meant the computer system recovery of significant data in another case: when principal computer breaks down, in the time of can't moving, CPU as principal computer breaks down, this moment is not if finish system's switching, ensure the continuity of data and guarantee professional not disruptive, consequence is hardly imaginable.The present invention selects wherein a backup computer to be set to new principal computer to finish system and switch.Backup computer is that whether whether operate as normal detects principal computer break down and can't move by continuous test principal computer.
Such as, backup computer regularly sends to principal computer and detects packet, under the situation of principal computer operate as normal, can return a response data packet.When backup computer receives this response data packet in Preset Time, think that then principal computer is under the normal operating conditions at present, backup computer is not received response data packet in several sense cycle, assert that then principal computer breaks down.Backup computer is set at the IP address of original principal computer with its own IP address, thus the realization system switch, and then finish data and recover.
When backup computer has many, can preestablish the priority of backup computer.The highest Normal Backups computing machine of priority uses " heartbeat technology " to detect whether operate as normal of principal computer.
More than disclosed only be several specific embodiment of the present invention, but the present invention is not limited thereto, any those skilled in the art can think variation, all should drop in protection scope of the present invention.
Claims (9)
1, a kind of data reconstruction method is characterized in that, comprising: backup procedure and rejuvenation, wherein:
(1) backup procedure
(1) the principal computer file division that will need to back up becomes the plurality of data piece, and the data block of described file is kept at least one the backup computer simultaneously;
(2) after the data of the data block of described file change, principal computer is sent to the data block of described generation data variation on the described backup computer and backs up;
(2) rejuvenation
(3) when detecting the corrupted data of principal computer, determine the data block of damage, and the described backed up data piece of acquisition carries out the data recovery from described backup computer.
2, data reconstruction method as claimed in claim 1 is characterized in that, step (1) principal computer is the data block that described file division is become fixed size.
3, data reconstruction method as claimed in claim 2 is characterized in that, each data block comprises effective length field, data block relevant information field, field CRC check sign indicating number, data division CRC check sign indicating number and data division.
4, data reconstruction method as claimed in claim 3 is characterized in that, step (3) is specially:
(31) the field CRC check sign indicating number of each data block of principal computer verification, data division CRC check sign indicating number, if field CRC check sign indicating number mistake, then according to effective length field, the data block relevant information field of data block described in the effective length field of the corresponding data piece that obtains in the backup computer and the data block relevant information field replacement principal computer; If data division CRC check sign indicating number mistake, then according to the data division of data block described in the data division replacement principal computer of the corresponding data piece that obtains in the backup computer.
5, data reconstruction method as claimed in claim 1 is characterized in that, the corrupted data that detects principal computer in the step (3) is specially: principal computer is found mistake in the reading of data process.
6, data reconstruction method as claimed in claim 1 or 2 is characterized in that, also comprises:
(4) break down to move the time when principal computer, select wherein a backup computer to be set to new principal computer and finish system and switch.
7, data reconstruction method as claimed in claim 6 is characterized in that, backup computer is that whether whether operate as normal detects principal computer break down and can't move by continuous test principal computer.
8, a kind of data reconstruction method is characterized in that, also comprises:
(1) backup procedure
(1) the principal computer file division that will need to back up becomes the plurality of data piece, and the data block of described file is kept at least one the backup computer simultaneously;
(2) after the data of the data block of described file change, principal computer is sent to the data block of described generation data variation on the described backup computer and backs up;
(2) rejuvenation
(3) break down can't move the time when principal computer, selecting wherein, a backup computer is set to new principal computer.
9, data reconstruction method as claimed in claim 8 is characterized in that, backup computer is that whether whether operate as normal detects principal computer break down and can't move by continuous test principal computer.
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| CNB2006100012998A CN100426247C (en) | 2006-01-12 | 2006-01-12 | Data recovery method |
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| CNB2006100012998A CN100426247C (en) | 2006-01-12 | 2006-01-12 | Data recovery method |
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| CN100426247C true CN100426247C (en) | 2008-10-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100478903C (en) * | 2006-08-21 | 2009-04-15 | 杭州华三通信技术有限公司 | Data backup system and method |
| CN100449501C (en) * | 2006-09-21 | 2009-01-07 | 上海交通大学 | Computer network datarecovering method |
| CN100492305C (en) * | 2007-01-24 | 2009-05-27 | 北京蓝科泰达科技有限公司 | Fast restoration method of computer system and apparatus |
| CN101520793A (en) * | 2008-12-30 | 2009-09-02 | 深圳市同洲电子股份有限公司 | Method and system for storing and reading stream media file and stream media server |
| CN102314354A (en) * | 2010-06-30 | 2012-01-11 | 无锡中星微电子有限公司 | Embedded system starting method and embedded device |
| CN102073560A (en) * | 2011-01-17 | 2011-05-25 | 北京深思洛克软件技术股份有限公司 | Data backup method and device |
| CN102436408B (en) * | 2011-10-10 | 2014-02-19 | 上海交通大学 | Data storage cloud and cloud backup method based on Map/Dedup |
| EP2908247A4 (en) | 2012-11-23 | 2015-11-11 | Huawei Tech Co Ltd | Method and apparatus for data restoration |
| CN105117303B (en) * | 2012-11-23 | 2018-11-30 | 华为技术有限公司 | A kind of method and apparatus that data are restored |
| US9264494B2 (en) | 2013-10-21 | 2016-02-16 | International Business Machines Corporation | Automated data recovery from remote data object replicas |
| CN103744745B (en) * | 2013-12-13 | 2018-05-29 | 北京奇虎科技有限公司 | A kind of detection method, equipment and the distributed memory system of data storage |
| CN104166605B (en) * | 2014-08-18 | 2017-04-12 | 四川航天系统工程研究所 | Data backup method and system based on incremental data files |
| CN104354723B (en) * | 2014-10-09 | 2016-09-28 | 青岛海信网络科技股份有限公司 | A kind of track traffic synthetic monitoring method and system |
| CN106844094B (en) * | 2016-12-23 | 2021-01-29 | 华为技术有限公司 | File repair method and device |
| CN111541578A (en) * | 2020-05-27 | 2020-08-14 | 合肥工大高科信息科技股份有限公司 | Data interaction device, method and system for dual-computer hot standby interlocking system |
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Effective date of registration: 20240202 Address after: No. 163 Liujiao South Lane, Qiaokou District, Wuhan City, Hubei Province, 430022 Patentee after: Hubei elite Shenghua Information Technology Co.,Ltd. Guo jiahuodiqu after: Zhong Guo Address before: 2, building 3, building 391, No. 310012, Wen two road, Zhejiang, Hangzhou, China Patentee before: Shanghai Trasin Information Technology Co.,Ltd. Guo jiahuodiqu before: Zhong Guo |