CN105354111A - Redundancy backup method suitable for wide-area distributed real-time database - Google Patents
Redundancy backup method suitable for wide-area distributed real-time database Download PDFInfo
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- CN105354111A CN105354111A CN201510718972.9A CN201510718972A CN105354111A CN 105354111 A CN105354111 A CN 105354111A CN 201510718972 A CN201510718972 A CN 201510718972A CN 105354111 A CN105354111 A CN 105354111A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1458—Management of the backup or restore process
- G06F11/1461—Backup scheduling policy
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1458—Management of the backup or restore process
- G06F11/1464—Management of the backup or restore process for networked environments
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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)
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Abstract
The present invention discloses a redundancy backup method suitable for a wide-area distributed real-time database. In a wide-area system, one or more copies are established in a distributed real-time database system for data in the system in a redundant manner, and consistency of the system is ensured by management of the copies. The method comprises the following steps: (1) the copies are divided into a cold copy and a thermal copy, wherein the thermal copy provides an external access, and the cold copy is only used as a backup copy providing no external service capability, and a thermal copy as a benchmark in all thermal copies becomes a master copy, and only the master copy is allowed to be written; (2) managing a status of the copy, wherein the copy is managed by means of status conversion the copy such as master/standby data switching and cold/thermal copy switching, so as to ensure consistency of data of the system; and (3) performing secondary positioning on a request that the master copy cannot achieve. According to the redundancy backup method suitable for a wide-area distributed real-time database provided by the present invention, a redundancy mechanism between different servers and different systems in the system is implemented; and consistency of the data in the wide-area distributed system is ensured by management of the copies.
Description
affiliated field
The present invention relates to a kind of redundancy backup method being applicable to wide-area distribution type real-time data base, belong to wide-area distribution type real-time dataBase system field.
Background technology
Wide-area distribution type real-time dataBase system is made up of the real-time database system be distributed in several systems, in order to the extensibility of each subsystem, and for realizing between subsystem redundancy scheme each other, therefore on subsystem internal different server, subsystem internal redundant node is built, between subsystem, build the redundancy scheme of subsystem simultaneously, but the redundancy scheme do not realized in existing real-time dataBase system in system between different server and between system, thus be difficult to ensure data consistency in wide-area distribution type system.
Summary of the invention
For overcoming the deficiency in prior art, the object of the invention is to provide a kind of based on copy, and be applicable to the redundancy backup method of wide-area distribution type real-time data base, data in distributed real-time database system are built redundant node between different server and between system in system, is ensured the consistance of data in wide-area distribution type system by the management of copy.
For achieving the above object: technical scheme of the present invention is as follows:
Be applicable to a redundancy backup method for wide-area distribution type real-time data base, in wide area system, not only will redundant node in system between different server in constructing system, also will between system the redundancy scheme of constructing system level.Data in distributed real-time database system set up one or more copy in a redundant way in systems in which, are ensured the consistance of system by the management of copy.It comprises following three steps:
1) copy is divided into access ability is not externally provided and in support copy cold copy and to be used for as reference copies and for the hot copy of external reference, there is a copy as benchmark in all hot copies and become primary copy, only have primary copy to allow write;
2) state of copy is managed, by the State Transferring of copy as the management that primary standby data switches, cold and hot copy has switched copy, the consistance of guarantee system data; The State Transferring of copy can through multiple state, and in system, data trnascription state comprises cold copy, hot copy, primary copy, synchronization counterpart and fault copy;
3) to the primary copy request of being beyond one's reach, secondary location is carried out; Described secondary location cannot access primary copy when data access, and when primary copy does not also break down, obtain a copy and be supplied to request of access in the hot copy of current non-master.
The beneficial effect that the present invention reaches:
The present invention realizes the redundancy scheme in system between different server and between system; And ensure data consistency in wide-area distribution type system by the management of copy; The present invention's many application real-time data base data syn-chronization mode ensure that portability, can along with real-time database security of system, stably operate in the operating system platforms such as IBMAIX, SunSolaris, AlphaTru64, HPUX, Linux, Windows; System programming language adopts ANSIC/C++, and meets IEEEPOSIX.2 standard.
Accompanying drawing explanation
Fig. 1 is real-time data base redundancy backup pattern between wide-area distribution type system
Fig. 2 is copy state transition graph.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described in detail.
The invention discloses a kind of redundancy backup method being applicable to wide-area distribution type real-time data base, in wide area system, not only will redundant node in system between different server in constructing system, also will between system the redundancy scheme of constructing system level.Data in distributed real-time database system set up one or more copy in a redundant way in systems in which, are ensured the consistance of system by the management of copy.
Method of the present invention comprises following step:
1) copy is divided into cold copy and hot copy, hot copy for external reference, cold copy only copy in support, not externally by service ability, there is a copy as benchmark in all hot copies becomes primary copy, only has primary copy to allow write;
2) state of copy is managed, by the State Transferring of copy as the management that primary standby data switches, cold and hot copy has switched copy, the consistance of guarantee system data;
3) to the primary copy request of being beyond one's reach, secondary location is carried out.
First the present invention sets up redundancy backup between wide-area distribution type system, can be two-way standby mutually between two cover systems, also can be standby mutually each other between many cover systems.
Inter-system data redundancy mutually standby function completes the management of copy by the State Transferring of copy.
When primary copy cannot be accessed, comprise database abnormal, the situations such as network is unreachable, this copy can be converted to fault copy, and inter-system data redundancy mutually standby function can specify new primary copy.
Cold copy is converted to the process need manual intervention of hot copy.In transfer process, copy state becomes synchronously by inter-system data redundancy mutually standby function, and checks whether the data of this copy may have access to, if access exception, this copy will be converted to fault copy; If checking process is normal, for doing an all data refreshing from main to this copy, to ensure data consistency, refreshing completes, and this copy is set to hot copy.
The redundancy backup method that the present invention relates to be combine be operated in the independent development of application layer wide-area distribution type real-time data base on realize, do not rely on concrete operating system, be applicable to various operating system.The many application real-time data base data syn-chronization mode that the present invention relates to ensure that portability, can along with real-time database security of system, stably operate in the operating system platforms such as IBMAIX, SunSolaris, AlphaTru64, HPUX, Linux, Windows; System programming language adopts ANSIC/C++, and meets IEEEPOSIX.2 standard.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (4)
1. one kind is applicable to the redundancy backup method of wide-area distribution type real-time data base, it is characterized in that, in wide area system, the data in distributed real-time database system set up one or more copy in a redundant way in systems in which, are ensured the consistance of system by the management of copy; Its concrete grammar comprises step:
1) copy is divided into access ability is not externally provided and in support copy cold copy and to be used for as reference copies and for the hot copy of external reference, there is a copy as benchmark in all hot copies and become primary copy, only have primary copy to allow write;
2) manage the state of copy, completed the management of copy by the State Transferring of copy, ensure the consistance of system data; The State Transferring of copy can through multiple state, and in system, the state of data trnascription comprises cold copy, hot copy, primary copy, synchronization counterpart and fault copy;
3) to the primary copy request of being beyond one's reach, secondary location is carried out; Described secondary location cannot access primary copy when data access, and when primary copy does not also break down, obtain a copy and be supplied to request of access in the hot copy of current non-master.
2. the redundancy backup method being applicable to wide-area distribution type real-time data base according to claim 1, it is characterized in that: in described step 1), redundancy backup is set up between wide-area distribution type system, two-way standby mutually between two cover systems or the above system of two covers.
3. the redundancy backup method being applicable to wide-area distribution type real-time data base according to claim 1, is characterized in that: in described step 2) in, inter-system data redundancy mutually standby function completes the management of copy by the State Transferring of copy.
4. the redundancy backup method being applicable to wide-area distribution type real-time data base according to claim 1, it is characterized in that: in described step 3), cold copy is converted in the process of hot copy, copy state becomes synchronously by inter-system data redundancy mutually standby function, and check whether the data of this copy may have access to, if access exception, this copy will be converted to fault copy; If checking process is normal, for doing an all data refreshing from main to this copy, to ensure data consistency, refreshing completes, and this copy is set to hot copy.
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| CN201510718972.9A CN105354111A (en) | 2015-10-29 | 2015-10-29 | Redundancy backup method suitable for wide-area distributed real-time database |
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| CN201510718972.9A CN105354111A (en) | 2015-10-29 | 2015-10-29 | Redundancy backup method suitable for wide-area distributed real-time database |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105959356A (en) * | 2016-04-26 | 2016-09-21 | 华中科技大学 | Method of realizing multi-cloud storage fault-tolerance conversion mechanism |
| CN106383754A (en) * | 2016-09-19 | 2017-02-08 | 北京众享比特科技有限公司 | Database backup and recovery system based on block chain technology, and database backup method based on block chain technology, and database recovery method based on block chain technology |
| CN107277151A (en) * | 2017-06-27 | 2017-10-20 | 曙光信息产业(北京)有限公司 | A kind of clocking method of job scheduling system |
| CN109347655A (en) * | 2018-09-11 | 2019-02-15 | 上海天旦网络科技发展有限公司 | Fault recovery system and method and storage medium based on network data |
| CN109783016A (en) * | 2018-12-25 | 2019-05-21 | 西安交通大学 | A kind of elastic various dimensions redundancy approach in distributed memory system |
| CN112929438A (en) * | 2021-02-04 | 2021-06-08 | 中国工商银行股份有限公司 | Business processing method and device of double-site distributed database |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105959356A (en) * | 2016-04-26 | 2016-09-21 | 华中科技大学 | Method of realizing multi-cloud storage fault-tolerance conversion mechanism |
| CN105959356B (en) * | 2016-04-26 | 2019-04-12 | 华中科技大学 | A method of realizing the cloudy fault-tolerant transformation mechanism of storage |
| CN106383754A (en) * | 2016-09-19 | 2017-02-08 | 北京众享比特科技有限公司 | Database backup and recovery system based on block chain technology, and database backup method based on block chain technology, and database recovery method based on block chain technology |
| CN107277151A (en) * | 2017-06-27 | 2017-10-20 | 曙光信息产业(北京)有限公司 | A kind of clocking method of job scheduling system |
| CN109347655A (en) * | 2018-09-11 | 2019-02-15 | 上海天旦网络科技发展有限公司 | Fault recovery system and method and storage medium based on network data |
| CN109347655B (en) * | 2018-09-11 | 2022-03-01 | 上海天旦网络科技发展有限公司 | Network data based fault recovery system and method and storage medium |
| CN109783016A (en) * | 2018-12-25 | 2019-05-21 | 西安交通大学 | A kind of elastic various dimensions redundancy approach in distributed memory system |
| CN112929438A (en) * | 2021-02-04 | 2021-06-08 | 中国工商银行股份有限公司 | Business processing method and device of double-site distributed database |
| CN112929438B (en) * | 2021-02-04 | 2022-09-13 | 中国工商银行股份有限公司 | Business processing method and device of double-site distributed database |
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Application publication date: 20160224 |