CN111158958B - Backup method, system, device and storage medium capable of quickly recovering data - Google Patents
Backup method, system, device and storage medium capable of quickly recovering data Download PDFInfo
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- CN111158958B CN111158958B CN201911410232.3A CN201911410232A CN111158958B CN 111158958 B CN111158958 B CN 111158958B CN 201911410232 A CN201911410232 A CN 201911410232A CN 111158958 B CN111158958 B CN 111158958B
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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
- G06F11/1448—Management of the data involved in backup or backup restore
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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
- G06F11/1458—Management of the backup or restore process
- G06F11/1469—Backup restoration techniques
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Abstract
The invention discloses a backup method, a system, a device and a storage medium capable of quickly recovering data, wherein the method comprises the following steps: acquiring a database file and a mirror image duplicate file and comparing to obtain an incremental file; backing up the incremental file, synthesizing to a corresponding mirror image copy and generating backup time; and comparing the backup time with a preset threshold, and finishing the backup if the backup time is less than or equal to the preset threshold. The system comprises: the device comprises an increment module, a backup module and a comparison module. The device comprises a memory and a processor for executing the backup method of the rapidly recoverable data. By using the invention, the data can be quickly recovered after the system is down, so that the system can work again. The backup method, the system, the device and the storage medium which can quickly restore data can be widely applied to the field of data backup.
Description
Technical Field
The present invention relates to the field of data backup, and in particular, to a method, system, device, and storage medium for quickly recovering data.
Background
The online backup (or mirror copy) of the database without the snapshot mode can make the database in an inconsistent state: the database is still in a writable state in the backup process, and the data block state in the database backup is inconsistent due to the write operation during the backup process, that is, the system also has a transaction to submit to generate a redo log in the backup process, and when data recovery is performed after the system is down, the database needs to be restored to a consistent state (namely, the database is rolled back to the previous backup state and the redo log is restored) to open and use the database.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a backup method, system, device and storage medium capable of quickly restoring data, which can quickly restore a system to a working state after the system is down.
The first technical scheme adopted by the invention is as follows: a backup method capable of quickly restoring data comprises the following steps:
acquiring a database file and a mirror image duplicate file and comparing to obtain an incremental file;
backing up the incremental file, synthesizing to a corresponding mirror image copy and generating backup time;
and comparing the backup time with a preset threshold, and finishing the backup if the backup time is less than or equal to the preset threshold.
Further, the method also comprises the following recovery steps:
restoring the system to the database which is backed up for the last time, and recovering the redo log;
and restoring the recovered redo log to a database.
Further, the step of backing up the incremental file, synthesizing the incremental file to a corresponding mirror image copy, and generating backup time specifically includes:
acquiring an increment file and establishing a process to analyze the increment file to obtain increment data;
and (4) backing up the incremental data, synthesizing the incremental data into a corresponding mirror image copy after the backup is finished, and generating backup time.
Further, the step of backing up the incremental data, synthesizing the incremental data into a corresponding mirror image copy after the backup is completed, and generating backup time specifically includes:
obtaining incremental data, classifying the incremental data and importing the incremental data into a multi-channel processing process;
respectively backing up the incremental data based on a multi-channel processing process to obtain the backed-up incremental data;
and synthesizing the backed-up incremental data into a mirror image copy of the corresponding incremental file based on a multi-channel processing process and generating backup time.
Further, the comparison result also includes that the backup time is greater than a preset threshold, and if the comparison result is that the backup time is greater than the preset threshold, the incremental file is continuously acquired and backup synthesis is performed on the incremental file.
Further, the number of creating processes is set according to the number of incremental files, the number of disks of backup storage and the number of CPUs.
Further, the incremental file also comprises a redo log generated in the backup process.
The second technical scheme adopted by the invention is as follows: a backup system for rapidly recoverable data, comprising:
the increment module is used for acquiring the database file and the mirror image duplicate file and comparing the database file and the mirror image duplicate file to obtain an increment file;
the backup module is used for backing up the incremental file, synthesizing the incremental file into a corresponding mirror image copy and generating backup time;
and the comparison module is used for comparing the backup time with a preset threshold value, and the backup is completed if the comparison result is that the backup time is less than or equal to the preset threshold value.
The third technical scheme adopted by the invention is as follows: a backup apparatus that can quickly restore data, comprising:
at least one processor;
at least one memory for storing at least one program;
when the at least one program is executed by the at least one processor, the at least one program causes the at least one processor to implement a backup method of rapidly recoverable data as described above.
The fourth technical scheme adopted by the invention is as follows: a storage medium having stored therein instructions executable by a processor, the storage medium comprising: the processor-executable instructions, when executed by the processor, are for implementing a backup method of quickly recoverable data as described above.
The method, the system, the device and the storage medium have the advantages that: according to the invention, through repeated backup of the system until the incremental backup time is less than or equal to the preset threshold, the redo logs generated in the backup process are reduced, so that the system only needs to recover less redo logs during recovery, thereby improving the recovery speed of the system.
Drawings
FIG. 1 is a flowchart illustrating steps of a method for backing up data that can be quickly restored according to the present invention;
fig. 2 is a block diagram of a backup system capable of rapidly restoring data according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments. The step numbers in the following embodiments are provided only for convenience of illustration, the order between the steps is not limited at all, and the execution order of each step in the embodiments can be adapted according to the understanding of those skilled in the art.
Due to the crash of the system caused by the attack or the system abnormality, the systems of most enterprises need to perform data backup, and most enterprises adopt an online backup mode, so that the database can be continuously written in the backup process, namely the system can continuously work in the backup process, but a working log is generated and is not backed up, and the working log is required to be restored to the database after the crash so as to enable the system to work again.
As shown in fig. 1, the present invention provides a backup method capable of quickly recovering data, which includes the steps of:
s101, obtaining and comparing the database file and the mirror image copy file to obtain an incremental file.
Specifically, in order to ensure data consistency, Oracle uses a global number to record the sequence number of each update operation on the database, the sequence number is increased by 1 each time a modification is submitted, and the top area of each data block records the sequence number of the data block which is modified for the last time. The mirror copy has an attribute to record its corresponding sequence number. When incremental backup is carried out, Oracle can generate an incremental file by comparing the sequence number of the mirror image copy with the sequence number of the data block. Because a large amount of time and IO consumption are consumed for comparing each data block, Oracle records the bitmap of each data block, modifies the bitmap while modifying the data block, and can find the modified data block by checking the bitmap during incremental backup without accessing the top area of each data block.
S102, backing up the incremental file, synthesizing to a corresponding mirror image copy and generating backup time;
s103, comparing the backup time with a preset threshold, and finishing the backup if the backup time is less than or equal to the preset threshold.
Specifically, if the comparison result is that the backup time is greater than the preset threshold, the incremental file is acquired again for backup synthesis, and the backup time is compared with the preset threshold to control and reduce the number of redo logs, so that the redo logs to be replied during system recovery are greatly reduced, and the time required by system recovery is reduced. In addition, the backup frequency can be set, when the backup frequency reaches a preset threshold value, the backup can be finished, and the repeated backup is specifically utilized to reduce the redo log, so that the system recovery speed is improved.
Further as a preferred embodiment of the method, the method further comprises the following recovery steps:
restoring the system to the database which is backed up for the last time, and recovering the redo log;
and restoring the recovered redo log to a database.
Specifically, the online backup mode is adopted, the system not only needs to roll back the database to the state of the latest backup, but also needs to perform redo log, otherwise, the database can not be opened and used because the database is in an inconsistent state with the mirror image copy, and the method reduces the generated redo log, thereby improving the speed of system recovery.
Further, as a preferred embodiment of the method, the step of backing up the incremental file, synthesizing the incremental file to the corresponding mirror image copy, and generating the backup time specifically includes:
acquiring an increment file and establishing a process to analyze the increment file to obtain increment data;
and (4) backing up the incremental data, synthesizing the incremental data into a corresponding mirror image copy after the backup is finished, and generating backup time.
Specifically, the incremental files in batches are analyzed and backed up through the creation process, the backup time is generated according to the consumed time, the backup time is compressed through repeated backup for many times, the backup time is short, the number of redo logs generated in the backup time is small, and the time required by system recovery can be reduced.
Further, as a preferred embodiment of the method, the step of backing up the incremental data, synthesizing the incremental data into a corresponding mirror image copy after the backup is completed, and generating backup time specifically includes:
obtaining incremental data, classifying the incremental data and importing the incremental data into a multi-channel processing process;
respectively backing up the incremental data based on a multi-channel processing process to obtain the backed-up incremental data;
and synthesizing the backed-up incremental data into a mirror image copy of the corresponding incremental file based on a multi-channel processing process and generating backup time.
Specifically, by means of multi-channel backup and multi-thread synthesis of the mirror image copies of the data files, backup time is saved, the difference of data blocks of the mirror image copies is made to be as small as possible, redo logs to be restored are correspondingly reduced, the number of channels can be set as required, and the channel number can be specifically determined according to the number of incremental files and the number of disks.
Further, as a preferred embodiment of the method, the comparison result further includes that the backup time is greater than a preset threshold, and if the comparison result is that the backup time is greater than the preset threshold, the incremental file is continuously acquired and backup synthesis is performed on the incremental file.
Specifically, the steps of obtaining the incremental file and backing up are repeatedly executed, and the backup interval is reduced in a mode of continuous multiple incremental backups, so that the number of redo logs needing to be restored is reduced, and the backup time is known to be smaller than a preset threshold value.
Further, as a preferred embodiment of the method, the number of creating processes is set according to the number of incremental files, the number of disks for backup storage and the number of CPUs.
Further as a preferred embodiment of the method, the incremental file further includes a redo log generated during the backup process.
Specifically, the redo log is a work log generated in the backup process, and when the redo log is repeatedly backed up, the system is always in a readable and writable state in the backup process, so that a transaction is submitted to generate the work log.
The specific embodiment of the invention is as follows:
the method comprises the steps that an Oracle database carries out data backup, a database file and a mirror image copy file are obtained and compared to obtain an incremental file, if no mirror image copy exists, the database file is fully backed up, a multi-channel process is established to classify and analyze the incremental file to obtain corresponding incremental data, the incremental data are backed up respectively on the basis of multiple channels, the incremental data are synthesized into the corresponding mirror image copy after the backup is finished, backup time is generated after the synthesis is finished, a time threshold value and a time threshold value are preset, the backup times and the backup time are respectively compared with the time threshold value and the time threshold value, when the backup time is larger than the set time threshold value and the backup times are smaller than the time threshold value, the incremental file is continuously obtained and backup operation is carried out, the steps are circulated until the backup time is larger than the set time threshold value or the backup times reach the time threshold value, and after the backup is finished, rolling back the system to the database which is backed up for the last time when the system is recovered, recovering the redo log, and finally restoring the recovered redo log to the database.
As shown in fig. 2, a backup system capable of rapidly restoring data includes:
the increment module is used for acquiring the database file and the mirror image duplicate file and comparing the database file and the mirror image duplicate file to obtain an increment file;
the backup module is used for backing up the incremental file, synthesizing the incremental file into a corresponding mirror image copy and generating backup time;
and the comparison module is used for comparing the backup time with a preset threshold value, and the backup is completed if the comparison result is that the backup time is less than or equal to the preset threshold value.
Further as a preferred embodiment of the present system, further comprising:
the recovery module is used for recovering the system to the database which is backed up last time and recovering the redo log;
and the redo module is used for restoring the redo log after recovery to the database.
As a further preferred embodiment of the present system, the backup module further includes:
the analysis submodule is used for acquiring the incremental file and establishing a process to analyze the incremental file to obtain incremental data;
and the classification submodule is used for acquiring the incremental data, classifying the incremental data and importing the incremental data into the multi-channel processing process.
The processing submodule is used for respectively backing up the incremental data based on the multi-channel processing process to obtain the backed-up incremental data;
and the synthesis submodule is used for synthesizing the backed-up incremental data into a mirror image copy of the corresponding incremental file based on a multi-channel processing process and generating backup time.
The contents in the above method embodiments are all applicable to the present system embodiment, the functions specifically implemented by the present system embodiment are the same as those in the above method embodiment, and the beneficial effects achieved by the present system embodiment are also the same as those achieved by the above method embodiment.
A backup device capable of quickly restoring data:
at least one processor;
at least one memory for storing at least one program;
when the at least one program is executed by the at least one processor, the at least one processor is caused to implement a backup method of rapidly recoverable data as described above.
The contents in the above method embodiments are all applicable to the present apparatus embodiment, the functions specifically implemented by the present apparatus embodiment are the same as those in the above method embodiments, and the advantageous effects achieved by the present apparatus embodiment are also the same as those achieved by the above method embodiments.
A storage medium having stored therein instructions executable by a processor, the storage medium comprising: the processor-executable instructions, when executed by the processor, are for implementing a backup method of quickly recoverable data as described above.
The contents in the above method embodiments are all applicable to the present storage medium embodiment, the functions specifically implemented by the present storage medium embodiment are the same as those in the above method embodiments, and the advantageous effects achieved by the present storage medium embodiment are also the same as those achieved by the above method embodiments.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A backup method capable of quickly restoring data is characterized by comprising the following backup steps:
acquiring a database file and a mirror image duplicate file and comparing to obtain an incremental file;
backing up the incremental file, synthesizing to a corresponding mirror image copy and generating backup time; wherein the backup time refers to the time length required for backing up the incremental file;
comparing the backup time with a preset threshold, and when the comparison result shows that the backup time is greater than the preset threshold, continuing to acquire the incremental files and performing backup synthesis on the incremental files; and when the comparison result is that the backup time is less than or equal to the preset threshold value, the backup is finished.
2. The backup method of rapidly recoverable data according to claim 1, further comprising the step of recovering:
restoring the system to the database which is backed up for the last time, and recovering the redo log;
and restoring the recovered redo log to a database.
3. The method for backing up data that can be restored quickly as claimed in claim 1, wherein the step of backing up the incremental file, synthesizing to the corresponding mirror copy and generating the backup time specifically includes:
acquiring an increment file and establishing a process to analyze the increment file to obtain increment data;
and (4) backing up the incremental data, synthesizing the incremental data into a corresponding mirror image copy after the backup is finished, and generating backup time.
4. The method as claimed in claim 3, wherein the step of backing up the incremental data, synthesizing the incremental data into corresponding mirror copies after the backup is completed, and generating backup time specifically includes:
obtaining incremental data, classifying the incremental data and importing the incremental data into a multi-channel processing process;
respectively backing up the incremental data based on a multi-channel processing process to obtain the backed-up incremental data;
and synthesizing the backed-up incremental data into a mirror image copy of the corresponding incremental file based on a multi-channel processing process and generating backup time.
5. The backup method of claim 4, wherein: and setting the number of creating processes according to the number of incremental files, the number of disks for backup storage and the number of CPUs.
6. The backup method of claim 4, wherein: the incremental file also includes a redo log generated during the backup process.
7. A backup system for rapidly restoring data, comprising:
the increment module is used for acquiring the database file and the mirror image duplicate file and comparing the database file and the mirror image duplicate file to obtain an increment file;
the backup module is used for backing up the incremental file, synthesizing the incremental file into a mirror image copy and generating backup time; wherein the backup time refers to the time length required for backing up the incremental file;
the comparison module is used for comparing the backup time with a preset threshold value, and when the comparison result shows that the backup time is greater than the preset threshold value, continuously acquiring the incremental files and performing backup synthesis on the incremental files; and when the comparison result is that the backup time is less than or equal to the preset threshold value, the backup is finished.
8. A backup apparatus capable of quickly restoring data, comprising:
at least one processor;
at least one memory for storing at least one program;
when executed by the at least one processor, cause the at least one processor to implement a backup method of rapidly recoverable data as claimed in any of claims 1 to 6.
9. A storage medium having stored therein instructions executable by a processor, the storage medium comprising: the processor-executable instructions, when executed by a processor, are for implementing a method for backup of rapidly recoverable data as claimed in any one of claims 1 to 6.
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| CN113434339B (en) * | 2021-06-29 | 2023-07-18 | 方心科技股份有限公司 | Data encryption transmission system and method based on combined cyclic backup for intelligent computing center |
| CN113284039B (en) * | 2021-07-16 | 2021-10-08 | 杭州安恒信息技术股份有限公司 | Bitmap management method, device and equipment and readable storage medium |
| CN114328005B (en) * | 2021-09-08 | 2022-08-26 | 深圳市木浪云科技有限公司 | Method and system for incremental backup of container data |
| CN114924911B (en) * | 2022-05-19 | 2023-04-14 | 广州鼎甲计算机科技有限公司 | Method, device, equipment and storage medium for backing up effective data of Windows operating system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109062737A (en) * | 2018-08-24 | 2018-12-21 | 郑州云海信息技术有限公司 | A kind of method of quick backup test data |
| CN110083490A (en) * | 2019-04-29 | 2019-08-02 | 浙江豪联信息科技有限公司 | A kind of database backup method, restoring method and storage medium |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA3040488C (en) * | 2015-01-23 | 2021-11-02 | Servicenow, Inc. | Distributed computing system with resource managed database cloning |
| CN105955843B (en) * | 2016-04-21 | 2019-05-28 | 久盈世纪（北京）科技有限公司 | A kind of method and apparatus for database recovery |
| CN106126370A (en) * | 2016-06-15 | 2016-11-16 | 上海爱数信息技术股份有限公司 | Based on the Server free backup method and the system that store increment bitmap between snapshot |
| CN106354583B (en) * | 2016-08-30 | 2019-09-17 | 广州鼎甲计算机科技有限公司 | A kind of heat backup method and system of MySQL database |
| US10949310B2 (en) * | 2016-11-28 | 2021-03-16 | Sap Se | Physio-logical logging for in-memory row-oriented database system |
| CN107066357A (en) * | 2017-05-31 | 2017-08-18 | 广州鼎甲计算机科技有限公司 | A kind of database synthetic backup and carry restoration methods |
| CN107526657A (en) * | 2017-09-13 | 2017-12-29 | 沈阳东知科技有限公司 | A kind of Online Database Backup method and system |
| US11132331B2 (en) * | 2017-12-12 | 2021-09-28 | Rubrik, Inc. | Sharding of full and incremental snapshots |
| CN108563659A (en) * | 2017-12-29 | 2018-09-21 | 广州鼎甲计算机科技有限公司 | The synthesized backup method of SQL Server |
| CN109325075A (en) * | 2018-08-30 | 2019-02-12 | 黄疆 | A kind of timely carry recovery system of Oracle based on timed backup and method |
| CN109271461A (en) * | 2018-09-30 | 2019-01-25 | 广州鼎甲计算机科技有限公司 | The increment synthesized backup method and device of SQL Server database |
| CN109144790A (en) * | 2018-09-30 | 2019-01-04 | 广州鼎甲计算机科技有限公司 | The synthesized backup method and device of MySQL database |
| CN110543386B (en) * | 2019-09-16 | 2022-06-10 | 上海达梦数据库有限公司 | Data storage method, device, equipment and storage medium |
-
2019
- 2019-12-31 CN CN201911410232.3A patent/CN111158958B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109062737A (en) * | 2018-08-24 | 2018-12-21 | 郑州云海信息技术有限公司 | A kind of method of quick backup test data |
| CN110083490A (en) * | 2019-04-29 | 2019-08-02 | 浙江豪联信息科技有限公司 | A kind of database backup method, restoring method and storage medium |
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