CN101706781A - Method and system for centralized management of database caches - Google Patents
Method and system for centralized management of database caches Download PDFInfo
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Abstract
The invention provides a method and a system for the centralized management of database caches. The method comprises the following steps that: step S1, a database server sends database operating information to a database cache server; step S2, the database cache server performs corresponding operations on the database caches according to the database operating information, and returns an operating result to a database server; and step S3, the database server performs corresponding operations on a database according to the operating result. Through the centralized management of the database caches, the method and the system deploy a unified database cache server for a plurality of database servers, have no need to maintain one database cache on each database server, and perform corresponding operations on the database caches before operating the database, so the problem that a plurality of the database caches are synchronized while the database is synchronized is avoided, and the system resource is saved.
Description
Technical field
The present invention relates to a kind of database caches centralized management method and system, belong to data communication technology field.
Background technology
Cluster (Cluster) is a kind of loosely-coupled computing node set that is made of two or many node machines (server), for the user provides services on the Internet or single client's view of application program (comprising database, Web service and file service etc.), provide failover capability simultaneously near fault-tolerant machine.Group system generally by two or many node server systems by relevant hardware and software interconnection, each clustered node all is the separate server of its own process of operation.These processes can communicate with one another, and concerning net computer similarly are to have formed a triangular web, work in coordination with to the user application program, system resource and data are provided.
Network Load Balance is exactly that two or more group of server become to troop, and the Internet (Internet) client is used an Internet Protocol (Internet Protocol is called for short IP) address or one group of IP address visit cluster.Network Load Balance uses certain distributed algorithm that the request of client is mapped on certain main frame in the cluster.Briefly, a copy that is exactly program operates on the interior All hosts of cluster, pass through balancing technique then, the request that the outside is sent is assigned to certain station server in the symmetrical structure equably, and receiving the request that the requested service device can both independently be responded client computer, Network Load Balance then distributes operating load between these main frames.
It should be noted that under clustered deploy(ment) the Database Requirements unanimity between each server.If the data in database change, the database on other servers also needs and its keeps data consistent synchronously so, as shown in Figure 1.
Among Fig. 1, the IP address of user capture cluster correspondence is shone upon user's request to server B by load balancing, database on the server B is revised server A, server C, database on the server D need carry out synchronously, makes to be consistent with server B.
But, generally not carrying out database in the cluster separates with server, this is because if the words of all public database of Servers-all, because the identical table to database can not carry out read-write operation simultaneously, thus the occlusive effects performance can be produced, if this database goes wrong on the other hand, whole service will can not move fully, being kept at data of database will lose fully, produce more serious consequence, has also lost cluster improves reliability by redundancy meaning.
Database caches is meant the temporary container of database data in internal memory, and it has comprised the copy of database table data in internal memory, between database and data access layer.For the quite frequent system of Query Database operation, it is particularly important that good caching mechanism seems.Application system is at first inquired about in buffer memory when carrying out data read, has avoided the performance cost of data base call, and because internal memory operation is faster than disk operating, thereby also accelerated the inquiry velocity of database data greatly.
Database caches is the necessary means that guarantees server performance, and the position in server as shown in Figure 2.
Database replication is one group of database technology, is realized by database self.It from a database replication be distributed to the another one database, carries out data and database object synchronously, to keep the consistance between the database then between database.
Application system when the data on the database of one station server change, then can be passed through database replication technology when the on-premise network load balancing cluster, make that the database on other servers is consistent.
Database caches is meant that synchronously database caches and database carry out making the content of database caches and database be consistent synchronously on the server.
Under traditional clustered deploy(ment), each node all comprises a database.In order to improve performance, also comprise a database caches on each node simultaneously.When database synchronization, must also carry out synchronously the data banked cache.
But database synchronization is mainly by database replication technology, and database replication technology can not guarantee that database caches and database on other servers are consistent.Therefore, under the application of disposing cluster, need to use some other extra mechanism to guarantee the synchronous of database caches, patent " in the distributed system data cached synchronous configuration method and device " (number of patent application: 200810127364.0) propose when data-base content changes for example, the trigger in trigger data storehouse, by trigger data in the database caches and database are carried out synchronously, for example can go the monitor database table whether to change at set intervals, if change then upgrade the synchrodata banked cache.But these class methods all need to consume sizable performance, particularly every table has a lot of entries in the database, if the data in certain entry change, then the database caches on the Servers-all all must be made corresponding change, is difficult to guarantee synchronous promptness like this.
Summary of the invention
The purpose of this invention is to provide a kind of database caches centralized management method and system, need carry out synchronous problem to the data banked cache when avoiding, save system resource database synchronization.
For achieving the above object, the invention provides a kind of database caches centralized management method, described method comprises:
Step S1, database server send database manipulation message to the database caches server;
Step S2, the database caches server carries out corresponding operating according to described database manipulation message to the data banked cache, and the return result gives database server;
Step S3, database server carries out corresponding operating according to operating result to database.
To achieve these goals, the present invention also provides a kind of database caches centralized management system, and described system comprises one or more database servers and a data banked cache server;
Described database server is used to send database manipulation message to the database caches server, and according to the operating result that the database caches server returns database is carried out corresponding operating
Described database caches server is connected with one or more database servers, the partial database list item that is used for cache database, be used for the data banked cache being carried out corresponding operating, and the return result gives database server according to described database manipulation message.
The present invention is by managing concentratedly the data banked cache, many database servers are disposed a unified database caches server, need on every database server, all not keep a database caches, before being operated, database earlier the data banked cache is carried out corresponding operating, again a plurality of database caches are carried out synchronous problem when having avoided, saved system resource database synchronization.
Description of drawings
Fig. 1 is server under the clustered deploy(ment) and database relation synoptic diagram
Fig. 2 is database caches position view in server
Fig. 3 is a kind of database caches of the present invention centralized management method embodiment one synoptic diagram
Fig. 4 is a kind of database caches of the present invention centralized management method embodiment two synoptic diagram
Fig. 5 is a kind of database caches centralized management system of the present invention embodiment synoptic diagram
Fig. 6 is a kind of database caches centralized management system of the present invention deployment topologies synoptic diagram
Embodiment
The purpose of this invention is to provide a kind of database caches centralized management method and system, need carry out synchronous problem to the data banked cache when avoiding, save system resource database synchronization.
The present invention will be described below in conjunction with accompanying drawing, the invention provides a kind of database caches centralized management method, and Fig. 3 has provided a kind of database caches of the present invention centralized management method embodiment one synoptic diagram, and described method comprises:
Step S1, database server send database manipulation message to the database caches server;
Comprise database on the described database server, described caching server is used for the part list item of cache database, is connected with one or more database server.
Described database manipulation message can comprise database table name, database list item major key, database manipulation sign indicating number and database list item.
Step S2, the database caches server carries out corresponding operating according to described database manipulation message to the data banked cache, and the return result gives database server;
Step S3, database server carries out corresponding operating according to operating result to database.
The present invention is by managing concentratedly the data banked cache, many database servers are disposed a unified database caches server, need on every database server, all not keep a database caches, before being operated, database earlier the data banked cache is carried out corresponding operating, again a plurality of database caches are carried out synchronous problem when having avoided, saved system resource database synchronization.
When adding operation, described database manipulation sign indicating number is for adding operational code;
Described step S2 is specifically as follows: the database caches server adds the database list item in the database caches to according to database table name and database list item major key, and returns and add successful response to database server;
Described step S3 is specifically as follows: database server adds operation after receiving and adding successful response in database.
For example adding when operation, database server can send the TCP message to the database caches server according to following form:
| The database table name | Database list item major key | Database manipulation sign indicating number (interpolation operational code) | The database list item |
Database list item major key is the value of unique identification data storehouse list item in the database, can be the general unique identifier (Universally Unique Identifier is called for short UUID) of database table item.
After the database caches server is received message, go out database table name and database major key by as above format analysis, form key word (key) value in the database caches, this database list item is joined in Hash (Hash) table of database caches, and send one and add successful response to database server.
Database server adds the database list item in the database to after receiving and adding successful response.
When carrying out query manipulation, described database manipulation sign indicating number is the query manipulation sign indicating number, and described database list item is empty;
Described step S2 is specifically as follows: the database caches server inquires about whether there is corresponding database list item according to database table name and database list item major key in database caches, if inquire then return Query Result and give database server, otherwise the response that sends the inquiry failure is to database server;
Described step S3 is specifically as follows: database server directly returns Query Result after receiving Query Result; After the response of receiving the inquiry failure, on database server, inquire about, and the database list item that inquires is added in the database caches.
For example when carrying out query manipulation, database server can send the TCP message to the database caches server according to following form:
| The database table name | Database list item major key | Database manipulation sign indicating number (query manipulation sign indicating number) | Database list item (being empty) |
After the database caches server is received message, go out database table name and database major key by as above format analysis, form the key value, in the Hash table in the data query banked cache, if inquire then Query Result is sent to database server, otherwise the response that sends an inquiry failure is to database server.
Database server directly returns Query Result after receiving Query Result; After the response of receiving the inquiry failure, on database server, inquire about, and the database list item that inquires is added in the database caches according to top form.
When carrying out deletion action, described database manipulation sign indicating number is the deletion action sign indicating number, and described database list item is empty;
Described step S2 is specifically as follows: the database caches server carries out deletion action according to database table name and database list item major key in database caches, and returns the successful response of deletion and give database server;
Described step S3 is specifically as follows: database server carries out deletion action after receiving the successful response of deletion in database.
For example when carrying out deletion action, database server can send the TCP message to the database caches server according to following form:
| The database table name | Database list item major key | Database manipulation sign indicating number (deletion action sign indicating number) | Database list item (being empty) |
After the database caches server is received message, go out database table name and database major key by as above format analysis, form the key value, the Hash table of data query banked cache, if inquire then from Hash table, delete this list item, otherwise do not carry out any operation, and send a successful response of deletion to database server.
Database server is deleted corresponding list item after receiving the successful response of deletion from database.
When making amendment operation, described database manipulation sign indicating number is the retouching operation sign indicating number;
Described step S2 is specially: the database caches server inquires about whether there is corresponding database list item according to database table name and database list item major key in database caches, if inquire then revise corresponding database list item, and send be modified as merit response to database server, otherwise send revise failure response to database server;
Described step S3 is specially: database server receive revise successful response after, the operation of in database, making amendment; After receiving the response of revising failure, on database server, carry out retouching operation, and the database list item of revising is added in the database caches.
For example making amendment when operation, database server can send the TCP message to the database caches server according to following form:
| The database table name | Database list item major key | Database manipulation sign indicating number (retouching operation sign indicating number) | The database list item |
After the database caches server is received message, go out database table name and database major key by as above format analysis, form the key value, in the Hash table in the data query banked cache, if inquire then the database list item in the Hash of the database caches table be updated to database list item in the database manipulation message, and send be modified as merit response to database server, otherwise send a response of revising failure to database server.
Database server receive revise successful response after, the operation of in database, making amendment; After receiving the response of revising failure, on database server, carry out retouching operation, and the database list item of revising is added in the database caches.
Fig. 4 has provided a kind of database caches of the present invention centralized management method embodiment two synoptic diagram, present embodiment is except the step that comprises method embodiment one, also comprised step S4 before described step S1: whether the database server judgement is connected normal with the database caches server, if execution in step S1 then, otherwise directly database is operated.
Usually use TCP to connect between database caches server and the database server, occur interrupting if connect, the database caches server can detect, and this moment, it can all clear out all buffer memorys usually.Continue again the data in the database server are carried out buffer memory when connecting when recovering.
In common deployment, database caches server and database server are direct-connected by switch, network seldom occurs and connect the problem of interrupting.Interrupt if connect, generally because the database caches server breaks down or cuts off the power supply and causes, after restarting the database caches server or changing new engine, buffer memory will be cleared, and after the operate as normal data in the database server be carried out buffer memory.
The present invention also provides a kind of database caches centralized management system, and Fig. 5 has provided a kind of database caches centralized management system of the present invention embodiment synoptic diagram, and described system comprises one or more database servers and a data banked cache server;
Described database server is used to send database manipulation message to the database caches server, and according to the operating result that the database caches server returns database is carried out corresponding operating
Described database manipulation message can comprise database table name, database list item major key, database manipulation sign indicating number and database list item.
Described database caches server is connected with one or more database servers, the partial database list item that is used for cache database, be used for the data banked cache being carried out corresponding operating, and the return result gives database server according to described database manipulation message.
Described database server can also be used for whether normal judgement is connected with the database caches server before the transmission database manipulation message is to the database caches server, if send database manipulation message, otherwise directly database is operated to the database caches server.
When adding operation, described database manipulation sign indicating number is for adding operational code;
The database caches server can be used for adding the database list item to database caches according to database table name and database list item major key, and returns and add successful response to database server;
Database server adds operation after can being used to receive the successful response of interpolation in database.
When carrying out query manipulation, described database manipulation sign indicating number is the query manipulation sign indicating number, and described database list item is empty;
The database caches server can be used for whether having corresponding database list item according to database table name and database list item major key in the database caches inquiry, if inquire then return Query Result and give database server, otherwise the response that sends the inquiry failure is to database server;
Database server can be used for directly returning Query Result after receiving Query Result; After the response of receiving the inquiry failure, on database server, inquire about, and the database list item that inquires is added in the database caches.
When carrying out deletion action, described database manipulation sign indicating number is the deletion action sign indicating number, and described database list item is empty;
The database caches server can be used for carrying out deletion action according to database table name and database list item major key at database caches, and returns the successful response of deletion and give database server;
Database server carries out deletion action after can being used to receive the successful response of deletion in database.
When making amendment operation, described database manipulation sign indicating number is the retouching operation sign indicating number;
The database caches server can be used for whether having corresponding database list item according to database table name and database list item major key in the database caches inquiry, if inquire then revise corresponding database list item, and send be modified as merit response to database server, otherwise send revise failure response to database server;
Database server can be used for after receiving the successful response of modification, the operation of making amendment in database; After receiving the response of revising failure, on database server, carry out retouching operation, and the database list item of revising is added in the database caches.
Fig. 6 has provided a kind of database caches centralized management system of the present invention deployment topologies synoptic diagram, and this topology has following feature:
1. disposed the Network Load Balance cluster, i.e. many database servers;
2. all be deployed with database on every database server;
3. dispose 1 database caches server;
4. database server directly is connected with the database caches server;
5. keep the database unanimity by database replication technology between the database
The present invention is by managing concentratedly the data banked cache, many database servers are disposed a unified database caches server, need on every database server, all not keep a database caches, before being operated, database earlier the data banked cache is carried out corresponding operating, again a plurality of database caches are carried out synchronous problem when having avoided, saved system resource database synchronization.
Simultaneously, buffer memory by the management of database caches server centered, for example can be kept in the huge Hash table, improve the performance of data query banked cache.
The unified management of database caches has also reduced unnecessary buffer memory redundancy, for every station server has been saved valuable memory source greatly.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (9)
1. a database caches centralized management method is characterized in that, described method comprises:
Step S1, database server send database manipulation message to the database caches server;
Step S2, the database caches server carries out corresponding operating according to described database manipulation message to the data banked cache, and the return result gives database server;
Step S3, database server carries out corresponding operating according to operating result to database.
2. method according to claim 1 is characterized in that, described database manipulation message comprises database table name, database list item major key, database manipulation sign indicating number and database list item.
3. method according to claim 2 is characterized in that, described database manipulation sign indicating number is for adding operational code;
Described step S2 is specially: the database caches server adds the database list item in the database caches to according to database table name and database list item major key, and returns and add successful response to database server;
Described step S3 is specially: database server adds operation after receiving and adding successful response in database.
4. method according to claim 2 is characterized in that, described database manipulation sign indicating number is the query manipulation sign indicating number, and described database list item is empty;
Described step S2 is specially: the database caches server inquires about whether there is corresponding database list item according to database table name and database list item major key in database caches, if inquire then return Query Result and give database server, otherwise the response that sends the inquiry failure is to database server;
Described step S3 is specially: database server directly returns Query Result after receiving Query Result; After the response of receiving the inquiry failure, on database server, inquire about, and the database list item that inquires is added in the database caches.
5. method according to claim 2 is characterized in that, described database manipulation sign indicating number is the deletion action sign indicating number, and described database list item is empty;
Described step S2 is specially: the database caches server carries out deletion action according to database table name and database list item major key in database caches, and returns the successful response of deletion and give database server;
Described step S3 is specially: database server carries out deletion action after receiving the successful response of deletion in database.
6. method according to claim 2 is characterized in that, described database manipulation sign indicating number is the retouching operation sign indicating number;
Described step S2 is specially: the database caches server inquires about whether there is corresponding database list item according to database table name and database list item major key in database caches, if inquire then revise corresponding database list item, and send be modified as merit response to database server, otherwise send revise failure response to database server;
Described step S3 is specially: database server adds operation in database after receiving the successful response of modification; After receiving the response of revising failure, on database server, add operation, and the database list item of revising is added in the database caches.
7. according to the described arbitrary method of claim 1-6, it is characterized in that, also comprise step S4 before the described step S1: whether database server is judged and is connected normally with the database caches server, if execution in step S1 then, otherwise directly database is operated.
8. a database caches centralized management system is characterized in that, described system comprises one or more database servers and a data banked cache server;
Described database server is used to send database manipulation message to the database caches server, and according to the operating result that the database caches server returns database is carried out corresponding operating
Described database caches server is connected with one or more database servers, the partial database list item that is used for cache database, be used for the data banked cache being carried out corresponding operating, and the return result gives database server according to described database manipulation message.
9. system according to claim 8, it is characterized in that, described database server is used for also whether normal judgement is connected with the database caches server before the transmission database manipulation message is to the database caches server, if send database manipulation message, otherwise directly database is operated to the database caches server.
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| CN106033422A (en) * | 2015-03-11 | 2016-10-19 | 中国移动通信集团内蒙古有限公司 | A database operation control method, device and system |
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| CN108431804A (en) * | 2015-10-23 | 2018-08-21 | 甲骨文国际公司 | Multiple containers database is grouped into the ability of single container data-base cluster |
| CN107145549B (en) * | 2017-04-27 | 2020-01-14 | 深圳智高点知识产权运营有限公司 | Database cache control method and system |
| CN107145549A (en) * | 2017-04-27 | 2017-09-08 | 深圳智高点知识产权运营有限公司 | A kind of database caches control method and system |
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| CN109039743A (en) * | 2018-08-03 | 2018-12-18 | 西安东美信息科技有限公司 | The centralized management method of distributed storage ceph cluster networks |
| CN111159144A (en) * | 2019-11-27 | 2020-05-15 | 北京中交兴路信息科技有限公司 | Cache system and method |
| CN111159144B (en) * | 2019-11-27 | 2023-09-08 | 北京中交兴路信息科技有限公司 | Caching system and method |
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