CN105843707A - Quick recovery method and equipment of database - Google Patents
Quick recovery method and equipment of database Download PDFInfo
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- CN105843707A CN105843707A CN201610182044.XA CN201610182044A CN105843707A CN 105843707 A CN105843707 A CN 105843707A CN 201610182044 A CN201610182044 A CN 201610182044A CN 105843707 A CN105843707 A CN 105843707A
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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
- G06F11/1448—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
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/27—Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system architectures therefor
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- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
The invention discloses a quick recovery method and equipment of a database. The method comprises the following steps: establishing a data backup set; establishing a target database; triggering a database recovery request; starting a target database; and according to the database recovery request and source database data, carrying out the complete recovery of a database to be recovered, and or according to the database recovery request and the data backup set, carrying out the incomplete recovery of the database to be recovered. The quick recovery method and equipment of the database realizes the quick recovery of the database and has the advantages of being high in flexibility, short in database recovery time and simple in operation.
Description
Technical field
The present invention relates to field of computer technology, particularly relate to a kind of data base's quick recovery method and set
Standby.
Background technology
Along with the arrival of big data age, data volume is being doubled and redoubled, database application at industry-by-industry,
And the analysis and test to data has the highest requirement.How not affect raw data base feelings
Under condition, the use of complete paired data becomes the difficult problem faced by more and more enterprise.Although data base carries itself
Supply certain methods, but be difficult to meet the demand of user.Current data database data uses and data
The problem that storehouse restoration methods exists is as follows:
(1) data import to new database:
Along with being continuously increased of data volume, derive data from data base and become to be increasingly difficult to, need to expend
Plenty of time, need bigger disk space, and I/O and the CPU persistence to database host
Consume, had a strong impact on data base's operational efficiency.Instant data can derive, but for frequently
Data test and analysis, what mass data imported is time-consumingly to make people intolerable, greatly reduces work
Make efficiency, and this method cannot make data be in certain time point state of history.
(2) database copy method:
First the method influences whether the use of source database.Secondly replicate and transmitted by network, even if
It is that LAN equally exists time-consuming problem too for a long time.Last the method needs more professional DBA (data depositary management
Reason person) complete, arbitrary cannot complete this for program development engineer or Data Analyst
Item work.
(3) normal backup restoration methods:
The method recovery process uses Standby control file, after restore (recovery) Standby control file,
Also needing to restore database (recovering data base), this process is data file reproduction process,
The plenty of time can be consumed, simultaneously the biggest to the demand of disk space.
Summary of the invention
It is an object of the invention to overcome the defect of prior art, and a kind of fast quick-recovery of data base is provided
Method and apparatus, has the advantage that motility is high, the database recovery time is short, simple to operate.
The technical scheme realizing above-mentioned purpose is:
A kind of data base's quick recovery method of the present invention, including:
Set up data backup collection；
Set up target database；
Trigger data storehouse recovery request；
Start described target database；
The the most extensive of data base to be restored is carried out according to the request of described database recovery and source database data
Multiple, or carry out data base to be restored not according to the request of described database recovery and described data backup collection
Recover completely.
Further improvement of the present invention is, the method also includes:
Keep the concordance of target database and source database.
Further improvement of the present invention is, described according to the request of described database recovery and source database
Data carry out the recovery completely of data base to be restored, or according to the request of described database recovery and described number
The incomplete recovery carrying out data base to be restored according to backup set includes:
The type judging database recovery is asked to be to recover completely or the completeest according to described database recovery
Full recovery；
When the type of database recovery is for recovering completely, source database data are recovered to described number of targets
According to storehouse；
When the type of database recovery is incomplete recovery, by the number corresponding with the time point of required recovery
Recover to described target database according to the data in backup set.
Further improvement of the present invention is, described data backup collection includes: database data, data
Storehouse snapshot, database filing daily record and online daily record.
Further improvement of the present invention is, described by standby for the data corresponding with the time point of required recovery
The data that part is concentrated are recovered to described target database to include:
Set the required time point recovered extremely；
Choose the target database snapshot mated with described time point；
Call corresponding database data according to described target database snapshot and data base's archive log is extensive
Multiple described target database.
Further improvement of the present invention is, described holding target database and the concordance of source database
Including:
Judge that the type that current database recovers is to recover completely or incomplete recovery；
When current database recovers type for recovering completely, directly open target database；
When current database recovery type is incomplete recovery, keep target by resetting target database
Database association data and the concordance of source database associated data, described associated data includes data base
Title and SCN numerical value.
A kind of data base's fast recovery equipment of the present invention, including:
First device, is used for setting up data backup collection；
Second device, is used for setting up target database；
3rd device, for trigger data storehouse recovery request；
4th device, is used for starting described target database；
5th device, for carrying out to be restored according to the request of described database recovery and source database data
The recovery completely of data base, or treat according to the request of described database recovery and described data backup collection
Recover the incomplete recovery of data base.
Further improvement of the present invention is, this equipment also includes:
6th device, for keeping the concordance of target database and source database.
Further improvement of the present invention is, described 5th device is used for:
The type judging database recovery is asked to be to recover completely or the completeest according to described database recovery
Full recovery；
When the type of database recovery is for recovering completely, source database data are recovered to described number of targets
According to storehouse；
When the type of database recovery is incomplete recovery, by the number corresponding with the time point of required recovery
Recover to described target database according to the data in backup set.
Further improvement of the present invention is, described data backup collection includes: database data, data
Storehouse snapshot, database filing daily record and online daily record.
Further improvement of the present invention is, described by standby for the data corresponding with the time point of required recovery
The data that part is concentrated are recovered to described target database to include::
Set the required time point recovered extremely；
Choose the target database snapshot mated with described time point；
Call corresponding database data according to described target database snapshot and data base's archive log is extensive
Multiple described target database.
Further improvement of the present invention is, described 6th device is used for:
Judge that the type that current database recovers is to recover completely or incomplete recovery；
When current database recovers type for recovering completely, directly open target database；
When current database recovery type is incomplete recovery, keep target by resetting target database
Database association data and the concordance of source database associated data, described associated data includes data base
Title and SCN numerical value.
Due to the fact that and have employed above technical scheme so that it is have the advantages that and be:
Setting up data backup collection provides basis for recovering data base.Database snapshot is for as data base
The time point pointer of data and data base's archive log.Data backup collection, source database and target data
The cooperation in storehouse achieves the fast quick-recovery of data base.And have that motility is high, the database recovery time is short,
Advantage simple to operate.
Accompanying drawing explanation
Fig. 1 is the flow chart of data base's quick recovery method of the embodiment of the present invention；
Fig. 2 is the structural representation of data base's fast recovery equipment of the embodiment of the present invention；
Fig. 3 is the flow chart that data base's quick recovery method of the embodiment of the present invention can write statement.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described.
Referring to Fig. 1, a kind of data base's quick recovery method of the embodiment of the present invention, including walking as follows
Rapid:
First, data backup collection is set up.
Data backup collection refers to the set of a series of database data backup that can be used to and recover, and is not
The basis recovered completely, in the present embodiment, data backup collection automated back-up generates, and data backup collection is permissible
It is stored on target device, it is also possible to be stored on other equipment beyond target device, as being stored in
On other equipment, can be mounted on current machine by modes such as NFS (NFS).Build
Vertical data backup collection provides basis for recovering data base；
In the present embodiment, data backup collection includes: database data, database snapshot, database filing
Daily record and online daily record.
Data backup collection automated back-up in the present embodiment.Wherein, database data uses timed increase standby
Part.Database data incremental backup all can create database snapshot after completing every time.Archive log uses
Real-time incremental backs up.Database snapshot is for as database data and the time of data base's archive log
Point pointer, can be adjusted database data and the archive log of object time point by database snapshot
With.
Then, target database is set up.
In the present embodiment, target database refers to will be used for recovering data and uninstantiated data
Storehouse or on the data base of the database instance existed, but the database name recovered and example
Can not conflict with the data base existed and example.
Then, trigger data storehouse recovery request.
In the present embodiment, database recovery request can be to be touched by data user of service by web page
Send out, it is also possible to directly manually call script and trigger.
Restart target database example.
Start target database example and include the startup of database process and the distribution etc. of physical resource.
Afterwards, carry out according to database recovery request and source database data according to database recovery request
The recovery completely of data base to be restored, or please carry out treating extensive by summed data backup set according to database recovery
The incomplete recovery in complex data storehouse, farther includes:
The type judging database recovery is asked to be to recover completely or the most extensive according to database recovery
Multiple；
When the type of database recovery is for recovering completely, source database data are recovered to target database；
When the type of database recovery is incomplete recovery, by the number corresponding with the time point of required recovery
Recover to target database according to the data in backup set.
Concrete, the data data backup corresponding with the time point of required recovery concentrated are recovered to mesh
Mark data base include:
Set the required time point recovered extremely；
Choose the target database snapshot mated with time point；
Database data and data base's archive log recovery mesh of correspondence is called according to target database snapshot
Mark data base.
Recover completely to refer to return to last data cell that source database can recover；No
Recover the time point referring to return to middle backup procedure completely.
By a data of snapshot clone selected, these data are hung by the way of NFS
It is downloaded to target machine, so greatly reduces the time-consuming of data duplication, only need to do on web and join accordingly
Put and trigger recovery operation.
Finally, the concordance of target database and source database is kept.
Target database is kept to ensure that the data base after recovery can be normal with the concordance of source database
Open.
In the present embodiment, target database is kept to include with the concordance of source database:
Judge that the type that current database recovers is to recover completely or incomplete recovery；
When current database recovers type for recovering completely, target database has consistent with source database
Property, directly open target database；
When current database recovery type is incomplete recovery, keep target by resetting target database
Database association data and the concordance of source database associated data, associated data includes database-name
With SCN numerical value.
SCN (System Change Number), is after oracle database updates, by DBMS
Automatically the numeral going accumulation to be incremented by is safeguarded.
Refer to Fig. 3, in the present embodiment, following statement can be write for realizing this method:
(1) data base is started to nomount state
This process is undertaken in two steps:
A () is according to current hosts situation configuration parameter file initSID.ora.
B () also starts data to nomunt state with changing Parameter File.
Startup nomount pfile='？/initSID.ora’
(2) control file is created
This process is undertaken in two steps:
A () amendment creates the sql file trace.sql controlling file
Non-fully recover:
CREATE CONTROLFILE REUSE DATABASE clone RESETLOGS ARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
MAXINSTANCES 8
MAXLOGHISTORY 292
LOGFILE
GROUP 1'？/redo01.log'SIZE 50M,
GROUP 2'？/redo02.log'SIZE 50M,
GROUP 3'？/redo03.log'SIZE 50M
DATAFILE
'？/system01.dbf',
'？/sysaux01.dbf'
′？/undotbs01.dbf',
'？/users01.dbf'
CHARACTER SET AL32UTF8；
Recover completely:
CREATE CONTROLFILE REUSE DATABASE clone NORESETLOGS ARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
MAXINSTANCES 8
MAXLOGHISTORY 292
LOGFILE
GROUP 1'？/redo01.log'SIZE 50M,
GROUP 2'？/redo02.log'SIZE 50M,
GROUP 3'？/redo03.log'SIZE 50M
DATAFILE
'？/system01.dbf',
'？/sysaux01.dbf'
′？/undotbs01.dbf',
'？/users01.dbf'
CHARACTER SET AL32UTF8；
B () performs sql and creates control file
sqlplus>@trace.sql
(3) some recovery time is set
Rman order arranges the stop time point needing to recover according to demand.
SET UNTIL TIME"to_date('2015-04-22 20:38:03','yyyy-mm-dd
hh24:mi:ss')"；
(4) data base is recovered
Data base is recovered by rman order.
RECOVER DATABASE；
(5) data base is opened
Different modes is used to open the data base recovered according to recovering type.
A () recovers completely:
ALTER DATABASE OPEN；
(b) incomplete recovery:
ALTER DATABASE OPEN RESETLOGS；
Refer to Fig. 2, a kind of data base's fast recovery equipment of the present invention, including:
First device 1, is used for setting up data backup collection；Data backup collection includes: database data, number
According to storehouse snapshot, database filing daily record and online daily record；
Second device 2, is used for setting up target database；
3rd device 3, for trigger data storehouse recovery request；
4th device 4, is used for starting target database；
5th device 5, for carrying out number to be restored according to database recovery request and source database data
According to the recovery completely in storehouse, or data base to be restored please be carried out by summed data backup set according to database recovery
Incomplete recovery；
6th device 6, for keeping the concordance of target database and source database.
Wherein, the 5th device 5 is used for:
The type judging database recovery is asked to be to recover completely or the most extensive according to database recovery
Multiple；
When the type of database recovery is for recovering completely, source database data are recovered to target database；
When the type of database recovery is incomplete recovery, by the number corresponding with the time point of required recovery
Recover to target database according to the data in backup set.
5th device 5 is further used for:
Set the required time point recovered extremely；
Choose the target database snapshot mated with time point；
Database data and data base's archive log recovery mesh of correspondence is called according to target database snapshot
Mark data base.
In the present embodiment, the 6th device 6 is used for:
Judge that the type that current database recovers is to recover completely or incomplete recovery；
When current database recovers type for recovering completely, directly open target database；
When current database recovery type is incomplete recovery, keep target by resetting target database
Database association data and the concordance of source database associated data, associated data includes database-name
With SCN numerical value.
Above in association with accompanying drawing embodiment, the present invention is described in detail, ordinary skill people in this area
The present invention can be made many variations example by member according to the above description.Thus, some details in embodiment
Should not constitute limitation of the invention, the present invention by the scope that defines using appended claims as this
The protection domain of invention.
Claims (12)
1. data base's quick recovery method, including:
Set up data backup collection；
Set up target database；
Trigger data storehouse recovery request；
Start described target database；
The the most extensive of data base to be restored is carried out according to the request of described database recovery and source database data
Multiple, or carry out data base to be restored not according to the request of described database recovery and described data backup collection
Recover completely.
Data base's quick recovery method the most according to claim 1, wherein, the method is also wrapped
Include:
Keep the concordance of target database and source database.
Data base's quick recovery method the most according to claim 2, wherein, described in described basis
Database recovery request and source database data carry out the recovery completely of data base to be restored, or according to institute
State database recovery request and described data backup collection carries out the incomplete recovery bag of data base to be restored
Include:
The type judging database recovery is asked to be to recover completely or the completeest according to described database recovery
Full recovery；
When the type of database recovery is for recovering completely, source database data are recovered to described number of targets
According to storehouse；
When the type of database recovery is incomplete recovery, by the number corresponding with the time point of required recovery
Recover to described target database according to the data in backup set.
Data base's quick recovery method the most according to claim 3, wherein, described data backup
Collection includes: database data, database snapshot, database filing daily record and online daily record.
Data base's quick recovery method the most according to claim 4, wherein, described will be with required
The data that data backup corresponding to time point recovered is concentrated are recovered to described target database to include:
Set the required time point recovered extremely；
Choose the target database snapshot mated with described time point；
Call corresponding database data according to described target database snapshot and data base's archive log is extensive
Multiple described target database.
Method the most according to claim 2, wherein, described holding target database and source data
The concordance in storehouse includes:
Judge that the type that current database recovers is to recover completely or incomplete recovery；
When current database recovers type for recovering completely, directly open target database；
When current database recovery type is incomplete recovery, keep target by resetting target database
Database association data and the concordance of source database associated data, described associated data includes data base
Title and SCN numerical value.
7. data base's fast recovery equipment, it is characterised in that including:
First device, is used for setting up data backup collection；
Second device, is used for setting up target database；
3rd device, for trigger data storehouse recovery request；
4th device, is used for starting described target database；
5th device, for carrying out to be restored according to the request of described database recovery and source database data
The recovery completely of data base, or treat according to the request of described database recovery and described data backup collection
Recover the incomplete recovery of data base.
Data base's fast recovery equipment the most according to claim 6, it is characterised in that this equipment
Also include:
6th device, for keeping the concordance of target database and source database.
Data base's fast recovery equipment the most according to claim 8, it is characterised in that described
Five devices are used for:
The type judging database recovery is asked to be to recover completely or the completeest according to described database recovery
Full recovery；
When the type of database recovery is for recovering completely, source database data are recovered to described number of targets
According to storehouse；
When the type of database recovery is incomplete recovery, by the number corresponding with the time point of required recovery
Recover to described target database according to the data in backup set.
Data base's fast recovery equipment the most according to claim 9, it is characterised in that described
Data backup collection includes: database data, database snapshot, database filing daily record and online daily record.
11. data base's fast recovery equipments according to claim 10, it is characterised in that described
The data data backup corresponding with the time point of required recovery concentrated are recovered to described target database
Including::
Set the required time point recovered extremely；
Choose the target database snapshot mated with described time point；
Call corresponding database data according to described target database snapshot and data base's archive log is extensive
Multiple described target database.
12. data base's fast recovery equipments according to claim 8, it is characterised in that described
6th device is used for:
Judge that the type that current database recovers is to recover completely or incomplete recovery；
When current database recovers type for recovering completely, directly open target database；
When current database recovery type is incomplete recovery, keep target by resetting target database
Database association data and the concordance of source database associated data, described associated data includes data base
Title and SCN numerical value.
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| CN201610182044.XA CN105843707B (en) | 2016-03-28 | 2016-03-28 | Database quick recovery method and equipment |
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|---|---|---|---|
| CN201610182044.XA CN105843707B (en) | 2016-03-28 | 2016-03-28 | Database quick recovery method and equipment |
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