CN110413616A - A kind of backup method and device of database undo table space - Google Patents
A kind of backup method and device of database undo table space Download PDFInfo
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- CN110413616A CN110413616A CN201910636866.4A CN201910636866A CN110413616A CN 110413616 A CN110413616 A CN 110413616A CN 201910636866 A CN201910636866 A CN 201910636866A CN 110413616 A CN110413616 A CN 110413616A
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- data
- database
- backup
- mirror image
- undo
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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
- G06F16/22—Indexing; Data structures therefor; Storage structures
- G06F16/2282—Tablespace storage structures; Management thereof
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- Data Mining & Analysis (AREA)
- Databases & Information Systems (AREA)
- Quality & Reliability (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
The present invention provides a kind of backup method of database undo table space, comprising the following steps: creates undo backup table space in the database, and creates backup table in undo backup table space；Monitoring changes operation to the additions and deletions of the data in database；In response to monitoring that the additions and deletions to the data in database change operation, the preceding mirror image of data is written in interim table；And the preceding mirror image of the data in interim table is read in real time, and the preceding mirror image of data is written in backup table.Through the invention, the backup logic for realizing undo table space data, is greatly improved the readability of undo table space data, while also reducing risk brought by undo table space loss of data.
Description
Technical field
The present invention relates to computer fields, and more particularly, to a kind of backup method of database undo table space
With device.
Background technique
Data in database undo table space have very important effect, can back up to mirror image before data,
It can be used for inquiring the data put in those years, can be used for data recovery, so the backup in undo watch buckle space is very
It is important.But physical backup is only done to the backup of undo table space at present, i.e., is backed up by database rman, or by stopping library
The mode of copy undo table space, there are no a kind of backup logic methods to back up the data in undo table space.Logic
The data that backup comes out can intuitively be used to inquire very much, data are restored etc., and very transparent to upper layer application, thus logic is standby
Part is also very important.
Summary of the invention
In consideration of it, the purpose of the embodiment of the present invention is to propose a kind of database undo table space to be carried out backup logic
Method, so as to so that the data that backup logic comes out intuitively are used to inquire very much, data are restored etc..
Based on above-mentioned purpose, the one side of the embodiment of the present invention provides a kind of backup side of database undo table space
Method, comprising the following steps:
Undo backup table space is created in the database, and creates backup table in the undo backup table space；
Monitoring changes operation to the additions and deletions of the data in the database；
In response to monitoring that the additions and deletions to the data in the database change operation, the preceding mirror image write-in of the data is faced
When table in；And
It reads the preceding mirror image of the data in the interim table in real time, and the preceding mirror image of the data is written to described
In backup table.
In some embodiments, the method also includes:
After the preceding mirror image of the data is written in the backup table, the preceding mirror image in the interim table is deleted.
In some embodiments, described in response to monitoring that the additions and deletions to the data in the database change operation, it will
The preceding mirror image of the data is written in interim table
The preceding mirror image for the data for there are additions and deletions to change operation is captured by trigger, and the preceding mirror image of the data is written temporarily
In table.
In some embodiments, the interim table is configured to be stored in other table spaces of the database.
In some embodiments, the interim table is configured to be stored in the backup table space of the database.
The another aspect of the embodiment of the present invention provides a kind of back-up device of database undo table space, comprising:
At least one processor；With
Memory, the memory are stored with the program code that processor can be run, and said program code is by processor
Following steps are executed when operation:
Undo backup table space is created in the database, and creates backup table in the undo backup table space；
Monitoring changes operation to the additions and deletions of the data in the database；
In response to monitoring that the additions and deletions to the data in the database change operation, the preceding mirror image write-in of the data is faced
When table in；And
It reads the preceding mirror image of the data in the interim table in real time, and the preceding mirror image of the data is written to described
In backup table.
In some embodiments, the method also includes:
After the preceding mirror image of the data is written in the backup table, the preceding mirror image in the interim table is deleted.
It in some embodiments, will be described in response to monitoring that the additions and deletions to the data in the database change operation
The preceding mirror image of data is written in interim table
The preceding mirror image for the data for there are additions and deletions to change operation is captured by trigger, and the preceding mirror image of the data is written temporarily
In table.
In some embodiments, the interim table is configured to be stored in other table spaces of the database.
In some embodiments, the interim table is configured to be stored in the backup table space of the database.
The present invention has following advantageous effects: a kind of database undo table space provided in an embodiment of the present invention it is standby
Part method and apparatus realizes the backup logic of undo table space data, is greatly improved the readable of undo table space data
Property, while also reducing risk brought by undo table space loss of data.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other embodiments are obtained according to these attached drawings.
Fig. 1 is a kind of flow chart of the backup method of database undo table space according to the present invention；
Fig. 2 is a kind of schematic diagram of the backup method of database undo table space according to the present invention；
Fig. 3 is a kind of hardware structural diagram of the back-up device of database undo table space according to the present invention.
Specific embodiment
The following describe the embodiment of the present invention.It should be appreciated, however, that the disclosed embodiments are only example, and
Other embodiments can take various alternative forms.The drawings are not necessarily drawn to scale；Certain functions may be exaggerated or minimum
Change the details to show particular elements.Therefore, specific structure and function details disclosed herein are not necessarily to be construed as restrictive,
And it is merely possible to for instructing those skilled in the art to use representative basis of the invention in various ways.As this field is general
It is logical the skilled person will understand that, the various features with reference to shown or described by any one attached drawing can with it is one or more other
Feature shown in the drawings is combined to produce the embodiment for not being explicitly illustrated or describing.The group of shown feature is combined into typical case
Provide representative embodiment.However, the various combinations and modification of the feature consistent with the teachings of the present invention are for certain spies
Fixed application or embodiment may be desired.
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
The embodiment of the present invention is further described in attached drawing.
Based on above-mentioned purpose, on the one hand the embodiment of the present invention proposes a kind of backup side of database undo table space
Method, as shown in Figure 1, comprising the following steps:
S101 creates undo backup table space in the database, and backup is created in the undo backup table space
Table；
S102 monitoring changes operation to the additions and deletions of the data in the database；
S103 is in response to monitoring that the additions and deletions to the data in the database change operation, by the preceding mirror-write of the data
Enter in interim table；And
S104 reads the preceding mirror image of the data in the interim table in real time, and the preceding mirror image of the data is written to
In the backup table.
In some embodiments, database execution additions and deletions change operation come when modifying data, the preceding mirror image of data is stored in
In undo table space, and new data is then stored in data table space.As shown in Fig. 2, being supervised in real time by data catching function
The movement that the additions and deletions of data change in control database captures the preceding mirror image (data of Yao Xiugai) of data modification data and is written into
In interim table, while the preceding mirror image of data catching function confirmation data has been written into undo table space.Data catching function is touching
Device is sent out, when there are data additions and deletions to change, the preceding mirror image of modification data will be captured, the preceding mirror image of data is written one temporarily
In table.
In some embodiments, the preceding mirror image that the data in interim table are read by data manifolding apparatus, is then write
Enter in backup table created.Data manifolding apparatus is embodied as storing process, reads the data in interim table in real time, then
It will be written into the backup table created in undo backup table space in real time.
In some embodiments, after data manifolding apparatus writes the data in backup table, data manifolding apparatus is again interim
The content recorded in table is deleted.
In some embodiments, interim table can be set in the undo backup table space of database, also can be set
In other table spaces of database.
Technically in feasible situation, it can be combined with each other above in relation to technical characteristic cited by different embodiments,
Or change, add and omit etc., to form the additional embodiment in the scope of the invention.
From above-described embodiment as can be seen that a kind of backup method of database undo table space provided in an embodiment of the present invention
The backup logic for realizing undo table space data is greatly improved the readability of undo table space data, while also reducing
Risk brought by undo table space loss of data.
Based on above-mentioned purpose, the other side of the embodiment of the present invention proposes a kind of the standby of database undo table space
Part device one embodiment.
The back-up device of institute's database undo table space includes memory and at least one processor, and memory is stored with
The computer program that can be run on a processor, processor execute any one of the above method when executing program.
As shown in figure 3, the hardware of one embodiment for the back-up device of database undo table space provided by the invention
Structural schematic diagram.
It include processor 301 and memory in the computer equipment by taking computer equipment as shown in Figure 3 as an example
302, and can also include: input unit 303 and output device 304.
Processor 301, memory 302, input unit 303 and output device 304 can pass through bus or other modes
It connects, in Fig. 3 for being connected by bus.
Memory 302 is used as a kind of non-volatile computer readable storage medium storing program for executing, can be used for storing non-volatile software journey
Sequence, non-volatile computer executable program and module, such as the database undo table space in the embodiment of the present application
Corresponding program instruction/the module of backup method.Non-volatile software of the processor 301 by operation storage in the memory 302
Program, instruction and module, thereby executing the various function application and data processing of server, i.e. the realization above method is implemented
The backup method of the database undo table space of example.
Memory 302 may include storing program area and storage data area, wherein storing program area can store operation system
Application program required for system, at least one function；Storage data area can store the backup side according to database undo table space
The data etc. that method is created.In addition, memory 302 may include high-speed random access memory, it can also include non-volatile
Memory, for example, at least a disk memory, flush memory device or other non-volatile solid state memory parts.In some realities
It applies in example, optional memory 302 includes the memory remotely located relative to processor 301, these remote memories can lead to
Network connection is crossed to local module.The example of above-mentioned network includes but is not limited to internet, intranet, local area network, movement
Communication network and combinations thereof.
Input unit 303 can receive the number or character information of input, and generate standby with database undo table space
The related key signals input of the user setting and function control of the computer equipment of part method.Output device 304 may include showing
Display screen etc. shows equipment.
Corresponding program instruction/the module of the backup method of one or more of database undo table spaces is stored in institute
It states in memory 302, when being executed by the processor 301, executes the database undo table in above-mentioned any means embodiment
The backup method in space.
Any one embodiment of the computer equipment of the backup method for executing the database undo table space, can
To achieve the effect that corresponding aforementioned any means embodiment is identical or similar.
Finally, it should be noted that those of ordinary skill in the art will appreciate that realizing the whole in above-described embodiment method
Or part process, related hardware can be instructed to complete by computer program, the program can be stored in computer can
It reads in storage medium, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, described to deposit
Storage media can be magnetic disk, CD, read-only memory (ROM) or random access memory (RAM) etc..
In addition, typically, it can be various electric terminal equipments, example that the embodiment of the present invention, which discloses described device, equipment etc.,
Such as mobile phone, personal digital assistant (PDA), tablet computer (PAD), smart television, are also possible to large-scale terminal device, such as service
Device etc., therefore protection scope disclosed by the embodiments of the present invention should not limit as certain certain types of device, equipment.The present invention is real
Apply example disclose the client can be applied to the combining form of electronic hardware, computer software or both it is above-mentioned any
In a kind of electric terminal equipment.
In addition, disclosed method is also implemented as the computer program executed by CPU according to embodiments of the present invention, it should
Computer program may be stored in a computer readable storage medium.When the computer program is executed by CPU, the present invention is executed
The above-mentioned function of being limited in method disclosed in embodiment.
In addition, above method step and system unit also can use controller and for storing so that controller is real
The computer readable storage medium of the computer program of existing above-mentioned steps or Elementary Function is realized.
In addition, it should be appreciated that computer readable storage medium (for example, memory) as described herein can be it is volatile
Property memory or nonvolatile memory, or may include both volatile memory and nonvolatile memory.As example
And not restrictive, nonvolatile memory may include read-only memory (ROM), programming ROM (PROM), electrically programmable to son
ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory.Volatile memory may include arbitrary access
Memory (RAM), the RAM can serve as external cache.As an example and not restrictive, RAM can be with more
Kind form obtains, such as synchronous random access memory (DRAM), dynamic ram (DRAM), synchronous dram (SDRAM), double data rate SDRAM
(DDR SDRAM), enhancing SDRAM (ESDRAM), synchronization link DRAM (SLDRAM) and directly Rambus RAM (DRRAM).
The storage equipment of disclosed aspect is intended to the memory of including but not limited to these and other suitable type.
Those skilled in the art will also understand is that, various illustrative logical blocks, mould in conjunction with described in disclosure herein
Block, circuit and algorithm steps may be implemented as the combination of electronic hardware, computer software or both.It is hard in order to clearly demonstrate
This interchangeability of part and software, with regard to various exemplary components, square, module, circuit and step function to its into
General description is gone.This function is implemented as software and is also implemented as hardware depending on concrete application and application
To the design constraint of whole system.Those skilled in the art can realize described in various ways for every kind of concrete application
Function, but this realization decision should not be interpreted as causing a departure from range disclosed by the embodiments of the present invention.
Various illustrative logical blocks, module and circuit, which can use, in conjunction with described in disclosure herein is designed to
The following component of function described here is executed to realize or execute: general processor, digital signal processor (DSP), dedicated collection
At circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, divide
Any combination of vertical hardware component or these components.General processor can be microprocessor, but alternatively, processing
Device can be any conventional processors, controller, microcontroller or state machine.Processor also may be implemented as calculating equipment
Combination, for example, the combination of DSP and microprocessor, multi-microprocessor, one or more microprocessors combination DSP and/or any
Other this configurations.
The step of method in conjunction with described in disclosure herein or algorithm, can be directly contained in hardware, be held by processor
In capable software module or in combination of the two.Software module may reside within RAM memory, flash memory, ROM storage
Device, eprom memory, eeprom memory, register, hard disk, removable disk, CD-ROM or known in the art it is any its
In the storage medium of its form.Illustrative storage medium is coupled to processor, enables a processor to from the storage medium
Information is written to the storage medium in middle reading information.In an alternative, the storage medium can be with processor collection
At together.Pocessor and storage media may reside in ASIC.ASIC may reside in user terminal.It is replaced at one
In scheme, it is resident in the user terminal that pocessor and storage media can be used as discrete assembly.
In one or more exemplary designs, the function can be real in hardware, software, firmware or any combination thereof
It is existing.If realized in software, can be stored in using the function as one or more instruction or code computer-readable
It is transmitted on medium or by computer-readable medium.Computer-readable medium includes computer storage media and communication media,
The communication media includes any medium for helping for computer program to be transmitted to another position from a position.Storage medium
It can be any usable medium that can be accessed by a general purpose or special purpose computer.As an example and not restrictive, the computer
Readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disc memory apparatus, disk storage equipment or other magnetic
Property storage equipment, or can be used for carry or storage form be instruct or data structure required program code and can
Any other medium accessed by general or specialized computer or general or specialized processor.In addition, any connection is ok
It is properly termed as computer-readable medium.For example, if using coaxial cable, optical fiber cable, twisted pair, digital subscriber line
(DSL) or such as wireless technology of infrared ray, radio and microwave to send software from website, server or other remote sources,
Then above-mentioned coaxial cable, optical fiber cable, twisted pair, DSL or such as wireless technology of infrared ray, radio and microwave are included in
The definition of medium.As used herein, disk and CD include compact disk (CD), laser disk, CD, digital versatile disc
(DVD), floppy disk, Blu-ray disc, wherein disk usually magnetically reproduce data, and CD using laser optics reproduce data.On
The combination for stating content should also be as being included in the range of computer-readable medium.
It should be understood that it is used in the present context, unless the context clearly supports exceptions, singular " one
It is a " it is intended to also include plural form.It is to be further understood that "and/or" used herein refers to including one or one
Any and all possible combinations of a above project listed in association.
It is for illustration only that the embodiments of the present invention disclose embodiment sequence number, does not represent the advantages or disadvantages of the embodiments.
Those of ordinary skill in the art will appreciate that realizing that all or part of the steps of above-described embodiment can pass through hardware
It completes, relevant hardware can also be instructed to complete by program, the program can store in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
Above-described embodiment is the possibility example of embodiment, and is mentioned just to be clearly understood that the principle of the present invention
Out.It should be understood by those ordinary skilled in the art that: the discussion of any of the above embodiment is exemplary only, it is not intended that dark
Show that range disclosed by the embodiments of the present invention (including claim) is limited to these examples；Under the thinking of the embodiment of the present invention,
It can also be combined, and exist present invention as described above between technical characteristic in above embodiments or different embodiments
Many other variations of the different aspect of embodiment, for simplicity, they are not provided in details.Therefore, all of the invention real
It applies within the spirit and principle of example, any omission, modification, equivalent replacement, improvement for being made etc. should be included in implementation of the present invention
Within the protection scope of example.
Claims (10)
1. a kind of backup method of database undo table space, which comprises the following steps:
Undo backup table space is created in the database, and creates backup table in the undo backup table space；
Monitoring changes operation to the additions and deletions of the data in the database；
In response to monitoring that the additions and deletions to the data in the database change operation, interim table is written into the preceding mirror image of the data
In；And
The preceding mirror image of the data in the interim table is read in real time, and the preceding mirror image of the data is written to the backup
In table.
2. the method according to claim 1, wherein the method also includes:
After the preceding mirror image of the data is written in the backup table, the preceding mirror image in the interim table is deleted.
3. the method according to claim 1, wherein described in response to monitoring to the data in the database
Additions and deletions change operation, the preceding mirror images of the data is written in interim table and includes:
The preceding mirror image for the data for there are additions and deletions to change operation is captured by trigger, and interim table is written into the preceding mirror image of the data
In.
4. the method according to claim 1, wherein the interim table is configured to be stored in its of the database
In his table space.
5. the method according to claim 1, wherein the interim table is configured to be stored in the institute of the database
It states in backup table space.
6. a kind of back-up device of database undo table space characterized by comprising
At least one processor；With
Memory, the memory are stored with the program code that processor can be run, and said program code is run by processor
Shi Zhihang following steps:
Undo backup table space is created in the database, and creates backup table in the undo backup table space；
Monitoring changes operation to the additions and deletions of the data in the database；
In response to monitoring that the additions and deletions to the data in the database change operation, interim table is written into the preceding mirror image of the data
In；And
The preceding mirror image of the data in the interim table is read in real time, and the preceding mirror image of the data is written to the backup
In table.
7. device according to claim 6, which is characterized in that the method also includes:
After the preceding mirror image of the data is written in the backup table, the preceding mirror image in the interim table is deleted.
8. device according to claim 6, which is characterized in that in response to monitoring the increasing to the data in the database
Operation is revised, will include: in the interim table of preceding mirror image write-in of the data
The preceding mirror image for the data for there are additions and deletions to change operation is captured by trigger, and interim table is written into the preceding mirror image of the data
In.
9. device according to claim 6, which is characterized in that the interim table is configured to be stored in its of the database
In his table space.
10. device according to claim 6, which is characterized in that the interim table is configured to be stored in the database
In the backup table space.
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| CN201910636866.4A CN110413616B (en) | 2019-07-15 | 2019-07-15 | Backup method and device for database undo table space |
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| CN201910636866.4A CN110413616B (en) | 2019-07-15 | 2019-07-15 | Backup method and device for database undo table space |
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| CN115129513A (en) * | 2022-06-29 | 2022-09-30 | 苏州浪潮智能科技有限公司 | Backup method, system, terminal and storage medium of temporary table data |
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| CN115129513B (en) * | 2022-06-29 | 2024-10-22 | 苏州浪潮智能科技有限公司 | Temporary table data backup method, system, terminal and storage medium |
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Also Published As
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| CN110413616B (en) | 2022-04-22 |
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