CN106855860A - Method and apparatus for creating master/slave data storehouse - Google Patents
Method and apparatus for creating master/slave data storehouse Download PDFInfo
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- CN106855860A CN106855860A CN201510900751.3A CN201510900751A CN106855860A CN 106855860 A CN106855860 A CN 106855860A CN 201510900751 A CN201510900751 A CN 201510900751A CN 106855860 A CN106855860 A CN 106855860A
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- mdl
- standby database
- information
- globally consistent
- standby
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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
- G06F16/23—Updating
- G06F16/2365—Ensuring data consistency and integrity
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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
- G06F16/21—Design, administration or maintenance of databases
Abstract
A kind of method and apparatus in establishment master/slave data storehouse that the purpose of the application there is provided, MDL and standby database are created by parallel, and the MDL and standby database have globally consistent information respectively；After the completion of establishment, another globally consistent information is changed or replaces using any described globally consistent information in the MDL and the standby database, so that the globally consistent information of the MDL is identical with the globally consistent information of the standby database；Start successively after the MDL and the standby database, the synchronous regime of the standby database and the MDL is kept by transaction journal, to complete active and standby establishment and initialization.MDL and standby database is created parallel, accelerate the establishment process of the active and standby example of database, to realize that flexible resource is stretched, save successfully, improve experience of the user to the establishment speed of example.
Description
Technical field
The application is related to computer realm, more particularly to a kind of technology for creating master/slave data storehouse.
Background technology
To realize high reliability, Database Systems typically take the standby or how standby framework of a master of a master one.
How standby an a kind of master framework be as shown in Figure 1.MDL is the main database server in Fig. 1,
Standby database is from database server in Fig. 1.As shown in figure 1, in the course of the work, main number
According to storehouse according to user's request processing business, business operation is carried out to its data database data, and will perform
Daily record by daily record sending module write transaction journal in, daily record sending module can by daily record send to
The daily record receiver module of standby database.Standby database can preserve and playback execution is carried out to daily record, and will hold
Capable result is stored in the database data of itself.
In the prior art, it is necessary to first create MDL when creating master/slave data storehouse, then by main number
Another machine is copied to according to storehouse, start this backup, you can complete the establishment in standby storehouse.It is current to create
The information that master/slave data storehouse generates when creating, it is desirable to globally unique.For example, system identifier, uses
It is active and standby to share same identifier in the uniqueness of the system of expression, it is therefore necessary to first master library is created
After building up, could start to create standby storehouse, i.e., first generate these information in master library, then it is complete by copy
Standby storehouse is copied to, makes their shared portion information, the problem of the current method for creating master/slave data storehouse be,
Active and standby establishment must be serial, causes example to create total time more long.
The content of the invention
The application technical problem to be solved is to provide one kind can accelerate the active and standby establishment process of database
Method and apparatus, with cloud environment for realize flexible resource stretch, save example creation time,
And then improve user experience.
In order to solve the above technical problems, on the one hand providing a kind of establishment master/slave data storehouse according to the application
Method, wherein, methods described includes：
Parallel to create MDL and standby database, the MDL and standby database have the overall situation respectively
Consistent information；
After the completion of establishment, using any described globally consistent in the MDL and the standby database
Information is changed or replaces another globally consistent information, so that the globally consistent information of the MDL
Globally consistent information with the standby database is identical；
Start successively after the MDL and the standby database, the standby number is kept by transaction journal
According to the synchronous regime of storehouse and the MDL, to complete active and standby establishment and initialization.
A kind of method for creating master/slave data storehouse is on the other hand provided according to the application, wherein, the side
Method includes：
Parallel to create MDL and standby database, the MDL and standby database have the overall situation respectively
Consistent information；
Start successively after the MDL and the standby database, the standby number is kept by transaction journal
According to the synchronous regime of storehouse and the MDL, to complete active and standby establishment and initialization；
When the standby database starts the synchronous MDL, by the MDL by its overall situation one
Write breath to be stored in the transaction journal, the standby database is synchronized to by the transaction journal, it is described
Standby database changes the globally consistent information for database after reading synchronizing information, so that the master
The globally consistent information of database is identical with the globally consistent information of the standby database.
A kind of equipment for creating master/slave data storehouse is provided according to the application another further aspect, wherein, it is described to set
It is standby to include：
Creating device, MDL and standby database, the MDL and standby data are created for parallel
Storehouse has globally consistent information respectively；
Massaging device, for establishment after the completion of, using appointing in the MDL and the standby database
Another globally consistent information is replaced in globally consistent information modification described in, so that the MDL
Globally consistent information it is identical with the globally consistent information of the standby database；
Sychronisation, for starting successively after the MDL and the standby database, by affairs day
Will keeps the synchronous regime of the standby database and the MDL, to complete active and standby establishment and initialization.
A kind of equipment for creating master/slave data storehouse is provided according to the another aspect of the application, wherein, it is described to set
It is standby to include：
Creating device, MDL and standby database, the MDL and standby data are created for parallel
Storehouse has globally consistent information respectively；
Sychronisation, for starting successively after the MDL and the standby database, by affairs day
Will keeps the synchronous regime of the standby database and the MDL, to complete active and standby establishment and initialization；
Massaging device, for when the standby database starts the synchronous MDL, by the main number
Its globally consistent information is stored in the transaction journal according to storehouse, is synchronized to by the transaction journal described
Standby database, the standby database changes the globally consistent letter for database after reading synchronizing information
Breath, so that the globally consistent information of the MDL is identical with the globally consistent information of the standby database.
Compared with prior art, according to embodiments herein methods described and equipment, MDL is made
Can parallel be created with standby database, accelerate the establishment process of the active and standby example of database, it is flexible to realize
Resource is stretched, and is saved successfully, improves experience of the user to the establishment speed of example.
Brief description of the drawings
The detailed description made to non-limiting example made with reference to the following drawings by reading, this Shen
Other features, objects and advantages please will become more apparent upon：
Fig. 1 shows that Database Systems take the standby configuration diagram of a master one in the prior art.
Fig. 2 shows the method schematic diagram for creating master/slave data storehouse on the one hand provided according to the application；
Fig. 3 shows the method schematic diagram for creating master/slave data storehouse on the other hand provided according to the application；
Fig. 4 shows the equipment schematic diagram for creating master/slave data storehouse provided according to the application another further aspect；
Fig. 5 shows the equipment schematic diagram for creating master/slave data storehouse provided according to the another aspect of the application；
Same or analogous reference represents same or analogous part in accompanying drawing.
Specific embodiment
The application is described in further detail below in conjunction with the accompanying drawings.
Fig. 2 shows the method for creating master/slave data storehouse on the one hand provided according to the application, wherein, institute
Stating method includes step S11, step S12 and step S13.
It is parallel to create MDL and standby database in the step S11, the MDL and standby
Database has globally consistent information respectively；
In the step S12, after the completion of establishment, using in the MDL and the standby database
Any described globally consistent information modification or replace another globally consistent information so that the main number
Globally consistent information according to storehouse is identical with the globally consistent information of the standby database；
In the step S13, start successively after the MDL and the standby database, by thing
Business daily record keeps the synchronous regime of the standby database and the MDL, to complete active and standby establishment and just
Beginningization.
Here, the globally consistent information can preferably include system identifier and the last checkpoint
Information, wherein, the system identifier is used to represent the uniqueness of system, and active and standby in distributed system
Carry out operational phase after the completion of establishment, the MDL and the standby database must share one it is identical
System identifier, the last checkpoint (checkpoint) information (if there is the machine of delaying in system, from
This checkpoint starts to recover data), additionally, the MDL is common with other needs of the standby database
Enjoy the information to be consistent, it is also possible to be included in the globally consistent information.Preferably, it is described complete
The generally unified storage of office's consistent information is in file is controlled.
It is parallel to create MDL and standby database in the step S11, the MDL and standby
Database has globally consistent information respectively.
Specifically, the step S11 includes：The MDL and the standby database are created parallel,
Configuration information is set up including parallel establishment file structure, based on system environmental information and initial data base is created；
And MDL described in behavior and the standby database distribute identical or different globally consistent information.
Wherein, the MDL is created the file structure of own database, is built based on system environmental information
Vertical configuration information and establishment initial data base, wherein, it is that the MDL distributes a globally consistent letter
Breath, the standby database creates the file structure of own database, sets up configuration information based on system environments
And initial data base is created, wherein, it is that the standby database distributes a globally consistent information.Now,
Because the MDL and the standby data base concurrency are created, therefore, the globally consistent information of the two can
Can be not consistent, consistent globally consistent information need to be replaced by subsequent step S12.
In the step S12, after the completion of establishment, using in the MDL and the standby database
Any described globally consistent information modification or replace another globally consistent information so that the main number
Globally consistent information according to storehouse is identical with the globally consistent information of the standby database.
Specifically, in a preferred embodiment, the step S12 includes：Obtain the MDL
Control file, the control file be used for deposit globally consistent information；By the control of the MDL
File replacement is copied to described from the control file in database.
In an additional preferred embodiment, the step S12 includes：Obtain the overall situation of the standby database
Consistent information；Globally consistent information based on the standby database changes the globally consistent of the MDL
Information, makes the globally consistent information of the MDL identical with the globally consistent information of the standby database.
In the step S13, start successively after the MDL and the standby database, by thing
Business daily record keeps the synchronous regime of the standby database and the MDL, to complete active and standby establishment and just
Beginningization.Specifically, first start MDL, then start standby database, it is synchronously main by transaction journal
The renewal of database, makes it keep the synchronous regime with MDL, completes active and standby establishment and initial chemical industry
Make.
Fig. 3 shows the method for creating master/slave data storehouse on the other hand provided according to the application, wherein, institute
Stating method includes step S21, step S22 and step S23.
It is parallel to create MDL and standby database in the step S21, the MDL and standby
Database has globally consistent information respectively；
In the step S22, start successively after the MDL and the standby database, by thing
Business daily record keeps the synchronous regime of the standby database and the MDL, to complete active and standby establishment and just
Beginningization；
In the step S23, when the standby database starts the synchronous MDL, by described
Be stored in its globally consistent information in the transaction journal by MDL, is synchronized to by the transaction journal
The standby database, the standby database changes global the one of the standby database after reading synchronizing information
Breath is write, so that the globally consistent information of the MDL and the globally consistent information for database
It is identical.
Here, the step S21 is identical with the content of step S11 described in Fig. 1 or essentially identical, institute
State step S22 identical with the content of step S13 described in Fig. 1 or essentially identical, for simplicity, no
Repeat again, be only incorporated herein by reference.
In the step S23, when the standby database starts synchronous master library daily record, the main number
Its globally consistent information is stored in transaction journal according to storehouse, the standby database is synchronized to by transaction journal,
The standby database reads these information, changes the corresponding informance in its database, it is kept and institute
State MDL consistent.
Specifically, its globally consistent information is stored in transaction journal by the MDL, when the standby number
When reading globally consistent information from transaction journal according to storehouse, that is, start to perform the overall situation one read
Write breath and replace the current globally consistent information of the standby database, completed when replacing, then complete described
MDL is identical with the globally consistent information of standby database.
Fig. 4 shows the equipment for creating master/slave data storehouse on the one hand provided according to the application, wherein, institute
Stating equipment includes creating device 11, massaging device 12 and sychronisation 13.
The creating device 11 creates MDL and standby database, the MDL and standby data parallel
Storehouse has globally consistent information respectively；
After the completion of described information device 12 is created, using appointing in the MDL and the standby database
Another globally consistent information is replaced in globally consistent information modification described in, so that the MDL
Globally consistent information it is identical with the globally consistent information of the standby database；
The sychronisation 13 starts after the MDL and the standby database successively, by affairs day
Will keeps the synchronous regime of the standby database and the MDL, to complete active and standby establishment and initialization.
Here, the globally consistent information can preferably include system identifier and the last checkpoint
Information, wherein, the system identifier is used to represent the uniqueness of system, and active and standby in distributed system
Carry out operational phase after the completion of establishment, the MDL and the standby database must share one it is identical
System identifier, the last checkpoint (checkpoint) information (if there is the machine of delaying in system, from
This checkpoint starts to recover data), additionally, the MDL is common with other needs of the standby database
Enjoy the information to be consistent, it is also possible to be included in the globally consistent information.Preferably, it is described complete
The generally unified storage of office's consistent information is in file is controlled.
The creating device 11 creates MDL and standby database, the MDL and standby data parallel
Storehouse has globally consistent information respectively.
Specifically, the creating device 11 creates the MDL and the standby database parallel, including
Parallel establishment file structure, configuration information is set up based on system environmental information and initial data base is created；Connect
, and MDL described in behavior and the standby database distribute identical or different globally consistent information.
Wherein, the MDL is created the file structure of own database, is built based on system environmental information
Vertical configuration information and establishment initial data base, wherein, it is that the MDL distributes a globally consistent letter
Breath, the standby database creates the file structure of own database, sets up configuration information based on system environments
And initial data base is created, wherein, it is that the standby database distributes a globally consistent information.Now,
Because the MDL and the standby data base concurrency are created, therefore, the globally consistent information of the two can
Can be not consistent, need subsequently to be replaced by consistent globally consistent information by massaging device 12.
Described information device 12 after the completion of establishment, using in the MDL and the standby database
Another globally consistent information is replaced in any globally consistent information modification, so that the master data
The globally consistent information in storehouse is identical with the globally consistent information of the standby database.
Specifically, in a preferred embodiment, described information device 12 obtains the control of the MDL
File processed, the control file is used to deposit globally consistent information；Then, by the control of the MDL
File replacement processed is copied to described from the control file in database.
In an additional preferred embodiment, described information device 12 obtains the overall situation of the standby database first
Consistent information；Then, the globally consistent information based on the standby database changes the complete of the MDL
Office's consistent information, makes the globally consistent information of the MDL and the globally consistent letter of the standby database
Manner of breathing is same.
The sychronisation 13 starts after the MDL and the standby database successively, by affairs day
Will keeps the synchronous regime of the standby database and the MDL, to complete active and standby establishment and initialization.
Specifically, first start MDL, then start standby database, by transaction journal synchronization MDL
Renewal, make its keep with the synchronous regime of MDL, complete active and standby establishment and initial work.
Fig. 5 shows the equipment for creating master/slave data storehouse on the other hand provided according to the application, wherein, institute
Stating equipment includes creating device 21, sychronisation 22 and massaging device 23.
The creating device 21 creates MDL and standby database, the MDL and standby data parallel
Storehouse has globally consistent information respectively；
The sychronisation 22 starts after the MDL and the standby database successively, by affairs day
Will keeps the synchronous regime of the standby database and the MDL, to complete active and standby establishment and initialization；
Described information device 23 when the standby database starts the synchronous MDL, by the main number
Its globally consistent information is stored in the transaction journal according to storehouse, is synchronized to by the transaction journal described
Standby database, the standby database changes the globally consistent letter for database after reading synchronizing information
Breath, so that the globally consistent information of the MDL is identical with the globally consistent information of the standby database.
Here, the creating device 21 is identical with the content of creating device described in Fig. 4 11 or basic phase
Together, the sychronisation 22 is identical with the content of sychronisation described in Fig. 4 13 or essentially identical, is
For the sake of simplicity, repeat no more, be only incorporated herein by reference.
Described information device 23 when the standby database starts synchronous master library daily record, the MDL
Its globally consistent information is stored in transaction journal, the standby database, institute are synchronized to by transaction journal
State standby database and read these information, change the corresponding informance in its database, make its keep with it is described
MDL is consistent.
Specifically, its globally consistent information is stored in transaction journal by the MDL, when the standby number
When reading globally consistent information from transaction journal according to storehouse, that is, start to perform the overall situation one read
Write breath and replace the current globally consistent information of the standby database, completed when replacing, then complete described
MDL is identical with the globally consistent information of standby database.
Compared with prior art, according to embodiments herein methods described and equipment, MDL is made
Can parallel be created with standby database, accelerate the establishment process of the active and standby example of database, it is flexible to realize
Resource is stretched, and is saved successfully, improves experience of the user to the establishment speed of example.
It should be noted that the application can be carried out in the assembly of software and/or software with hardware,
For example, application specific integrated circuit (ASIC), general purpose computer or any other similar hardware can be used
Equipment is realized.In one embodiment, the software program of the application can be by computing device with reality
Existing steps described above or function.Similarly, the software program (including related data structure) of the application
Can be stored in computer readable recording medium storing program for performing, for example, RAM memory, magnetically or optically driver or
Floppy disc and similar devices.In addition, some steps or function of the application can employ hardware to realize, example
Such as, coordinate so as to perform the circuit of each step or function as with processor.
In addition, the part of the application can be applied to computer program product, such as computer journey
Sequence is instructed, and when it is computer-executed, by the operation of the computer, can be called or be provided
According to the present processes and/or technical scheme.And the programmed instruction of the present processes is called, can
Can be stored in fixed or moveable recording medium, and/or be held by broadcast or other signals
Carry the data flow in media and be transmitted, and/or be stored in the meter according to described program instruction operation
In the working storage of calculation machine equipment.Here, the one embodiment according to the application includes a dress
Put, the device is included for storing the memory of computer program instructions and for execute program instructions
Processor, wherein, when the computer program instructions are by the computing device, trigger the device
Methods and/or techniques scheme of the operation based on foregoing multiple embodiments according to the application.
It is obvious to a person skilled in the art that the application is not limited to the thin of above-mentioned one exemplary embodiment
Section, and in the case of without departing substantially from spirit herein or essential characteristic, can be with other specific
Form realizes the application.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary
, and be nonrestrictive, scope of the present application is limited by appended claims rather than described above
It is fixed, it is intended that all changes fallen in the implication and scope of the equivalency of claim are included
In the application.The right that any reference in claim should not be considered as involved by limitation will
Ask.Furthermore, it is to be understood that " including " word is not excluded for other units or step, odd number is not excluded for plural number.Dress
The multiple units or device for putting statement in claim can also pass through software by a unit or device
Or hardware is realized.The first, the second grade word is used for representing title, and is not offered as any specific
Order.
Claims (16)
1. a kind of method for creating master/slave data storehouse, wherein, methods described includes：
Parallel to create MDL and standby database, the MDL and standby database have the overall situation respectively
Consistent information；
After the completion of establishment, using any described globally consistent in the MDL and the standby database
Information is changed or replaces another globally consistent information, so that the globally consistent information of the MDL
Globally consistent information with the standby database is identical；
Start successively after the MDL and the standby database, the standby number is kept by transaction journal
According to the synchronous regime of storehouse and the MDL, to complete active and standby establishment and initialization.
2. method according to claim 1, wherein, the globally consistent information includes at least following
Any one：
System identifier, the last checkpoint information.
3. method according to claim 1 and 2, wherein, the parallel establishment MDL and standby
Database includes：
Create the MDL and the standby database parallel, including parallel establishment file structure, be based on
System environmental information sets up configuration information and creates initial data base；
And MDL described in behavior and the standby database distribute identical or different globally consistent information.
4. according to the method in any one of claims 1 to 3, wherein, after the completion of the establishment,
It is another using the modification of any described globally consistent information or replacement in the MDL and the standby database
Globally consistent information includes described in one：
The control file of the MDL is obtained, the control file is used to deposit globally consistent information；
The control file of the MDL is replaced described in being copied to from the control file in database.
5. according to the method in any one of claims 1 to 3, wherein, after the completion of the establishment,
It is another using the modification of any described globally consistent information or replacement in the MDL and the standby database
Globally consistent information includes described in one：
Obtain the globally consistent information of the standby database；
Globally consistent information based on the standby database changes the globally consistent information of the MDL,
Make the globally consistent information of the MDL identical with the globally consistent information of the standby database.
6. a kind of method for creating master/slave data storehouse, wherein, methods described includes：
Parallel to create MDL and standby database, the MDL and standby database have the overall situation respectively
Consistent information；
Start successively after the MDL and the standby database, the standby number is kept by transaction journal
According to the synchronous regime of storehouse and the MDL, to complete active and standby establishment and initialization；
When the standby database starts the synchronous MDL, by the MDL by its overall situation one
Write breath to be stored in the transaction journal, the standby database is synchronized to by the transaction journal, it is described
Standby database changes the globally consistent information for database after reading synchronizing information, so that the master
The globally consistent information of database is identical with the globally consistent information of the standby database.
7. method according to claim 6, wherein, the globally consistent information includes at least following
Any one：
System identifier, the last checkpoint information.
8. the method according to claim 6 or 7, wherein, the parallel establishment MDL and standby
Database includes：
Create the MDL and the standby database parallel, including parallel establishment file structure, be based on
System environmental information sets up configuration information and creates initial data base；
And MDL described in behavior and the standby database distribute identical or different globally consistent information.
9. a kind of equipment for creating master/slave data storehouse, wherein, the equipment includes：
Creating device, MDL and standby database, the MDL and standby data are created for parallel
Storehouse has globally consistent information respectively；
Massaging device, for establishment after the completion of, using appointing in the MDL and the standby database
Another globally consistent information is replaced in globally consistent information modification described in, so that the MDL
Globally consistent information it is identical with the globally consistent information of the standby database；
Sychronisation, for starting successively after the MDL and the standby database, by affairs day
Will keeps the synchronous regime of the standby database and the MDL, to complete active and standby establishment and initialization.
10. equipment according to claim 9, wherein, the globally consistent information include at least with
Lower any one：
System identifier, the last checkpoint information.
11. equipment according to claim 9 or 10, wherein, the creating device is used for：
Create the MDL and the standby database parallel, including parallel establishment file structure, be based on
System environmental information sets up configuration information and creates initial data base；
And MDL described in behavior and the standby database distribute identical or different globally consistent information.
12. equipment according to any one of claim 9 to 11, wherein, described information device bag
Include：
The control file of the MDL is obtained, the control file is used to deposit globally consistent information；
The control file of the MDL is replaced described in being copied to from the control file in database.
13. equipment according to any one of claim 9 to 11, wherein, described information device bag
Include：
Obtain the globally consistent information of the standby database；
Globally consistent information based on the standby database changes the globally consistent information of the MDL,
Make the globally consistent information of the MDL identical with the globally consistent information of the standby database.
A kind of 14. equipment for creating master/slave data storehouse, wherein, the equipment includes：
Creating device, MDL and standby database, the MDL and standby data are created for parallel
Storehouse has globally consistent information respectively；
Sychronisation, for starting successively after the MDL and the standby database, by affairs day
Will keeps the synchronous regime of the standby database and the MDL, to complete active and standby establishment and initialization；
Massaging device, for when the standby database starts the synchronous MDL, by the main number
Its globally consistent information is stored in the transaction journal according to storehouse, is synchronized to by the transaction journal described
Standby database, the standby database changes the globally consistent letter for database after reading synchronizing information
Breath, so that the globally consistent information of the MDL is identical with the globally consistent information of the standby database.
15. equipment according to claim 14, wherein, the globally consistent information include at least with
Lower any one：
System identifier, the last checkpoint information.
16. equipment according to claims 14 or 15, wherein, the creating device includes：
Create the MDL and the standby database parallel, including parallel establishment file structure, be based on
System environmental information sets up configuration information and creates initial data base；
And MDL described in behavior and the standby database distribute identical or different globally consistent information.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11960369B2 (en) | 2021-10-26 | 2024-04-16 | International Business Machines Corporation | Efficient creation of a secondary database system |
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