CN102981777B - A kind of control method of data access and system - Google Patents
A kind of control method of data access and system Download PDFInfo
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- CN102981777B CN102981777B CN201210421361.4A CN201210421361A CN102981777B CN 102981777 B CN102981777 B CN 102981777B CN 201210421361 A CN201210421361 A CN 201210421361A CN 102981777 B CN102981777 B CN 102981777B
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Abstract
The invention discloses a kind of control method of data access, it is characterized in that, comprising: judge whether database server normally works; If described database server normally works, then the access instruction sent according to dispatch terminal module carries out data access to described database server; If described database server breaks down, then judge whether standby database server normally works, if normally, according to the access instruction that described dispatch terminal module sends, data access is carried out to standby database server.By the secure access adopting technical solution of the present invention to achieve core data, improving dispatch control work efficiency, is the safety guarantee that track traffic command system provides.
Description
Technical field
The present invention relates to City Rail Transit System, particularly relate to a kind of control method and system of data access.
Background technology
CTC(CentralizedTrafficControlSystem in City Rail Transit System, dispatching concentration control system) be mainly used in realizing the supervision to train operation and control, auxiliary driving dispatcher manages all fronts train, and it serves extremely important effect in raising rail vehicle transportation efficiency and guarantee security of operation.
CTC system is the supervision and control function realizing train operation safely and reliably, necessarily require to apply to the core train operation plan of dispatch control, reality, traffic order data actual time safety store and information sharing, once break down, the paralysis of whole dispatching and command system can be caused, yardman will get back to the original mode of operation of hand-made paper notes record data, phone traffic instruction from no paper teleworking, dispatch control work efficiency seriously reduces.
Prior art mainly adopts following two kinds of technical schemes: (1) dispatch control module adopts standard ODBC(OpenDatabaseConnectivity, Open Database Connection) or ADO(ActiveXDataObjects, ActiveX Data Objects) access interface, set up direct logical access passage with core database, realize data access.But the security of access data and stability rely on centralized database system completely in this technical scheme, after fault such as network, software occurs for it, the data access of dispatch control module will complete failure.(2) local data library module is increased in dispatch control module.Under normal circumstances, dispatch control module adopts standard ODBC or ADO access interface, sets up direct logical access passage, realize the data access of real-time high-efficiency with core database; When core database breaks down, can temporarily data be accessed at local data library module.But local data base module installation is in the client of system in this technical scheme, the data redundancy protection that core database adopts, security is poor.
Summary of the invention
The object of this invention is to provide a kind of control method and system of data access, achieve the secure access of core data, improving dispatch control work efficiency, is the safety guarantee that track traffic command system provides.
The controlling party of a kind of data access of one aspect of the present invention, comprising:
Judge whether database server normally works;
If described database server normally works, then the access instruction sent according to dispatch terminal module carries out data access to described database server;
If described database server breaks down, then judge whether standby database server normally works, if normally, according to the access instruction that described dispatch terminal module sends, data access is carried out to standby database server.
The present invention provides a kind of system of data access on the other hand, and this system comprises: dispatch terminal module, database server, standby database server, data simultaneous module and application server;
Described dispatch terminal module, for sending access instruction to described application server;
Described database server, for the service data that the access instruction stored to described dispatch terminal module sends is relevant;
Described standby database server, for the service data that the access instruction stored to described dispatch terminal module sends is relevant;
Described application server, for judging whether database server normally works; If described database server normally works, then the access instruction sent according to described dispatch terminal module carries out data access to described database server; If described database server breaks down, then the access instruction sent according to described dispatch terminal module carries out data access to standby database server;
Described data simultaneous module, for sending the status information of described database server and standby database server to described application server.
As seen from the above technical solution provided by the invention, after database server breaks down, according to the intelligent ruling of application server, be switched to and continue dispatch control work with the standby database server of database server synchronization; Simultaneously after system failure recovery, automatically switch back database server.Thus at utmost improve security and the continuity of system, ensure that the safety of each train dispatching section Railway Transport Control in Railway Bureau, emergent booster action is played to existing CTC, reduce to a certain extent system core equipment failure occur after impact on whole traffic dispatching command work, alleviating the work load of user of service, is the safety guarantee that track traffic command system provides.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
The process flow diagram of the control method of a kind of data access that Fig. 1 provides for the embodiment of the present invention one;
The process flow diagram of the control method of another data access that Fig. 2 provides for the embodiment of the present invention two;
The schematic diagram of the system of a kind of data access that Fig. 3 provides for the embodiment of the present invention three.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on embodiments of the invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to protection scope of the present invention.
Embodiment one
The process flow diagram of the control method of a kind of data access that Fig. 1 provides for the embodiment of the present invention, the method comprises:
Step 101, judge whether database server normally works.According to the status information obtained from described database server and data simultaneous module, judge whether described database server normally works; If described data server normally works, then proceed to step 102; Otherwise proceed to step 103.
Step 102, according to dispatch terminal module send access instruction data access is carried out to described database server.Concrete: dispatch terminal module is special encrypted message packet according to the protocol conversion of dispatching concentration Special safety, information interaction is carried out by ICP/IP protocol and application server, the access instruction of self scheduling terminal module is converted to ADO data access in the future, realizes the database access of kernel scheduling command information.Preferably, for guaranteeing data security, access instruction from dispatch terminal module is placed on the special stack list of application server (first in first out) according to the precedence of issuing time, every bar instruction only accesses at database information just can by complete deletion successfully, do not access successful instruction such as prosthetic to delete, will repeat within the regular hour.
Step 103, judge whether standby database server normally works, if normally, then proceed to step 104.During database server fault, dispatch terminal module cannot by application server at database server access data.Now, according to the status information obtained from described standby database server and data simultaneous module, judge whether described database server normally works
Step 104, the access instruction sent according to described dispatch terminal module carry out data access to standby database server.In the status information that basis obtains from database server, data simultaneous module, after confirming that standby database server can be used, application server will automatically switch access path to standby database server.Be special encrypted message packet by dispatch terminal module according to the protocol conversion of dispatching concentration Special safety, carry out information interaction by ICP/IP protocol and application server.The access instruction of application server self scheduling terminal module in future is converted to ADO data access, realizes the database access of kernel scheduling command information.Preferably, for guaranteeing data security, access instruction from dispatch terminal module is placed on the special stack list of application server (first in first out) according to the precedence of issuing time, every bar instruction only just can by complete deletion after the success of standby database Information Access, do not access successful instruction such as prosthetic to delete, will repeat within the regular hour.
The embodiment of the present invention, after database server breaks down, according to the intelligent ruling of application server, is switched to standby database server and continues dispatch control work.Thus at utmost improve security and the continuity of system, ensure that the safety of each train dispatching section Railway Transport Control in Railway Bureau, emergent booster action is played to existing CTC, reduce to a certain extent system core equipment failure occur after impact on whole traffic dispatching command work, alleviating the work load of user of service, is the safety guarantee that track traffic command system provides.
Embodiment two
In order to introduce the present invention more specifically, below in conjunction with accompanying drawing, 2 couples of the present invention are described further.
Corresponding Centralized Dispatching System database server three kinds of duties in the embodiment of the present invention: normal, fault and recovery, system three kinds of mode of operations: normal operation mode, standby operating mode and recovery mode of operation.
1, normal operation mode
On the one hand, under normal operation mode state, database server is working properly, and dispatch terminal module needs the following data carrying out accessing: add, delete, revise running train train number; Train operation plan AT STATION, interval, time-related adjustment; The record of train actual motion state; Train marshalling list information; Station, station bicycle parking information; The annotation of interval, station specific information; The editor of traffic order, the record of reiving/transmitting state; All accessed by database server.
Above-mentioned data access does not adopt the data access interfaces such as ODBC, ADO of the prior art directly to access database server, but be special encrypted message packet by dispatch terminal module according to the protocol conversion of dispatching concentration Special safety, carry out information interaction by ICP/IP protocol and application server.Concrete data access process is: (1) confirms whether database server normally works.Now, application server, according to the status information obtained from database server, data simultaneous module, judges whether database server normally works.(2) if confirm, database server can be used, then the access instruction of self scheduling terminal module is converted to ADO data access in the future, realizes the database access of kernel scheduling command information.
Preferably, for guaranteeing data security, the access instruction of application server self scheduling terminal module in future is stored in special stack list (first in first out) according to the sequencing of issuing time; Wherein, every bar instruction only accesses successfully at database information and just by complete deletion, can not access successful instruction such as prosthetic and delete, will repeat within the regular hour.
Preferably, when database server is working properly, application server meeting and standby database server carry out fixed time test, to determine whether standby database server can be used.Such as, application server and standby database server carry out timing On-board test, but during On-board test, the access instruction of in the future self scheduling terminal module can not be converted to ADO data access to standby database server, although application server can carry out On-board test to standby database server, thus judge whether standby server can be used, but the service data when On-board test in standby server can't be employed server and be sent to dispatch terminal module, thus affect the accuracy of data; In other words, the same time period, according to self ruling of application server, only a side of meeting and database server or standby database server is kept for the data interaction responding described dispatch terminal module, and under being now in normal operation mode, therefore, the data interaction that application server only can carry out for responding described dispatch terminal module with database server, the service data of carrying out timing On-board test with standby database server can't be employed server and be sent to dispatch terminal module.Obviously, the timing On-board test mentioned in citing be only test standby database whether can wherein a kind of test mode, user can carry out by other means according to demand standby database whether can test.
On the other hand, in the normal operating mode, during by carrying out On-board test to described standby database thus detecting that described standby database server is working properly, data simultaneous module synchronously processes to database server and the data in standby database server.Namely timing by the service data of (such as, 12 hours) in a period of time from database server to standby database server replicates.Concrete reproduction process is that three phases repeats: (1) to obtain the service data in a period of time by ADO data access from database server; (2) the whole service data of standby database server is deleted; (3) service data is copied to standby database server by ADO data access.
2, standby operating mode
When database server fault, system will automatically switch to standby operating mode.Now, dispatch terminal module cannot by application server at database server access data; Therefore, confirm whether standby server normally works by application server, after confirmation standby database server is working properly, application server will automatically switch access path to standby database server.Workflow under standby operating mode and the workflow under normal mode similar.Database access is also be special encrypted message packet by dispatch terminal module according to the protocol conversion of dispatching concentration Special safety, carries out information interaction by ICP/IP protocol and application server.Concrete data access process is: (1) confirms whether standby database server normally works.Now, application server, according to the status information obtained from standby database server, data simultaneous module, judges whether standby database server normally works.(2) if after confirming that standby database server can be used, the access instruction of self scheduling terminal module is converted to ADO data access in the future, realizes the database access of kernel scheduling command information.
Preferably, for guaranteeing data security, the access instruction of application server self scheduling terminal module in future is stored in special stack list (first in first out) according to the sequencing of issuing time; Wherein, every bar instruction only just by complete deletion, can not access successful instruction such as prosthetic and deletes, will repeat within the regular hour after the success of standby database Information Access.
And when system enters after under this mode of operation, application server and data simultaneous module all regularly can distinguish the malfunction of detection data storehouse server, in order to determine whether database server resumes work normally.
3, recovery mode of operation
Because Database Server System configuration is higher than standby database server, if can assert that database server recovers normal, the data access of dispatch terminal module will automatically switch to database server, realizes mainly through following steps:
(1) described application server and described data simultaneous module can detect described database server respectively, to judge whether described database server recovers normal, if two sides are being positive integer through N(N) after the detection in individual cycle, after all confirming that described database server is working properly, then can assert that database server recovers normal substantially, wherein, N is positive integer.
(2) when described database server recovers normal substantially, data simultaneous module synchronously processes to standby database server and the data in database server, and namely the service data in a period of time copies from standby database server to database server by timing.Concrete reproduction process is that three phases repeats: 1. to be obtained the operation in a period of time by ADO data access from standby database server; 2. the whole service data of delete database server; 3. service data is copied to database server by ADO data access.
(3) when being the positive integer being greater than N through M(M) the normal data synchronization process in individual cycle, then can assert that database server recovers normal completely, system will automatically switch to normal operation mode from recovery mode of operation, now, the access path of application server also by standby database Server switching to database server, again carry out data access with the flow process of normal operation mode.
Such as, find that described database server normally works when described application server and described data simultaneous module detect described database server 3 all after dates respectively, then described data simultaneous module enables synchronous mode, and the service data that standby database server described in a period of time is preserved is replaced the service data in described database server by timing; When after 10 subnormal data synchronization process, then can determine that database server recovers normal completely, system will automatically switch to normal operation mode from recovery mode of operation, now, the access path of application server also by standby database Server switching to database server, again carry out data access with the flow process of normal operation mode.Obviously, the numerical value of N and M not necessarily is 3 and 10, user also can carry out the setting of N and M numerical value according to actual conditions.
The embodiment of the present invention, after database server breaks down, according to the intelligent ruling of application server, is switched to and continues dispatch control work with the standby database server of database server synchronization; Simultaneously after system failure recovery, automatically switch back database server.Thus at utmost improve security and the continuity of system, ensure that the safety of each train dispatching section Railway Transport Control in Railway Bureau, emergent booster action is played to existing CTC, reduce to a certain extent system core equipment failure occur after impact on whole traffic dispatching command work, alleviating the work load of user of service, is the safety guarantee that track traffic command system provides.
Through the above description of the embodiments, those skilled in the art can be well understood to above-described embodiment can by software simulating, and the mode that also can add necessary general hardware platform by software realizes.Based on such understanding, the technical scheme of above-described embodiment can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions and perform method described in each embodiment of the present invention in order to make a computer equipment (can be personal computer, server, or the network equipment etc.).
Embodiment three
The schematic diagram of the system of a kind of data access that Fig. 3 provides for the embodiment of the present invention, comprising: dispatch terminal module 30, database server 31, standby database server 32, data simultaneous module 33 and application server 34;
Described dispatch terminal module 30, for sending access instruction to described application server;
Described database server 31, for the service data that the access instruction stored to described dispatch terminal module sends is relevant;
Described standby database server 32, for the service data that the access instruction stored to described dispatch terminal module sends is relevant;
Described application server 34, for judging whether database server normally works; If described database server normally works, then the access instruction sent according to described dispatch terminal module carries out data access to described database server; If described database server breaks down, then the access instruction sent according to described dispatch terminal module carries out data access to standby database server;
Described data simultaneous module 33, for sending the status information of described database server and standby database server to described application server.
Whether wherein, described application server 34 comprises: fixed time test submodule 341, for carrying out timing access test to described standby database server, detecting described standby database server and can use; Application server detection submodule 342, for the malfunction of timing probe data storehouse server after described database server breaks down; Instruction sub module stored 343: the sequencing for the access instruction issuing time according to described dispatch terminal module is stored in special stack list, every bar instruction only just can by complete deletion after database information or the success of standby database Information Access, do not access successful instruction such as prosthetic to delete, will repeat within the regular hour.
Described data simultaneous module 33 comprises:
First synchronous submodule 331, for when described database server and described standby database server all normally work, replaces the service data in described standby database server by the service data that database server described in a period of time is preserved; Data syn-chronization detection submodule, for the malfunction of timing probe data storehouse server after described database server breaks down; Second synchronous submodule 332, after the timing probe carrying out N number of cycle for detecting submodule when application server detection submodule and described data syn-chronization determines that described database server all normally works, the service data that standby database server described in a period of time is preserved is replaced the service data in described database server, described N is positive integer; Switching submodule 333, the described synchronous mode for the described second synchronous submodule normally carries out M all after date by data access by described standby database Server switching extremely described database server, and described M is positive integer.
It should be noted that, have a detailed description in the specific implementation of the function that each processing unit comprised in said apparatus realizes each embodiment above, therefore here repeat no more.
Those skilled in the art can be well understood to, for convenience and simplicity of description, only be illustrated with the division of above-mentioned each functional module, in practical application, can distribute as required and by above-mentioned functions and be completed by different functional modules, inner structure by device is divided into different functional modules, to complete all or part of function described above.The system of foregoing description, the specific works process of device and unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
By the device that the present embodiment provides, after database server breaks down, according to the intelligent ruling of application server, can be switched to and continue dispatch control work with the standby database server of database server synchronization; Simultaneously after system failure recovery, automatically switch back database server.Thus at utmost improve security and the continuity of system, ensure that the safety of each train dispatching section Railway Transport Control in Railway Bureau, emergent booster action is played to existing CTC, reduce to a certain extent system core equipment failure occur after impact on whole traffic dispatching command work, alleviating the work load of user of service, is the safety guarantee that track traffic command system provides.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (8)
1. a control method for data access, is characterized in that, comprising:
Application server judges whether database server normally works: described application server, according to the status information obtained from database server, data simultaneous module, judges whether database server normally works;
If described database server normally works, then the access instruction sent according to dispatch terminal module carries out data access to described database server; And, described application server and standby database server carry out timing access test, to determine whether standby database server can be used, wherein, during access test, application server the access instruction of in the future self scheduling terminal module can not be converted to ADO data access to standby database server, and the service data when access test in standby server can not be employed server is sent to dispatch terminal module;
If described database server breaks down, then judge whether standby database server normally works, if normally, according to the access instruction that described dispatch terminal module sends, data access is carried out to standby database server;
Wherein, during data access, be converted to ADO data access by the access instruction of application server self scheduling terminal module in future.
2. method according to claim 1, is characterized in that, the described access instruction sent according to dispatch terminal module carries out data access to described database server or standby database server and comprises:
Be stored in special stack list according to the sequencing of the access instruction issuing time of described dispatch terminal module, every bar instruction only just can by complete deletion after database information or the success of standby database Information Access, do not access successful instruction such as prosthetic to delete, will repeat within the regular hour.
3. method according to claim 1, it is characterized in that, when described database server and described standby database server all normally work, the service data that database server described in a period of time is preserved is replaced the service data in described standby database server by described data simultaneous module timing.
4. method according to claim 1, is characterized in that, comprises after described database server breaks down: the malfunction of timing probe data storehouse server, and specifically comprises:
Carry out the timing probe in N number of cycle, if detect described database server normally to work, then described data simultaneous module enables synchronous mode: the service data that standby database server described in a period of time is preserved is replaced the service data in described database server by timing, and described N is positive integer;
If described synchronous mode normally carries out M cycle, then by data access by described standby database Server switching to described database server, described M is the positive integer being greater than N.
5. a system for data access, is characterized in that, this system comprises: dispatch terminal module, database server, standby database server, data simultaneous module and application server;
Described dispatch terminal module, for sending access instruction to described application server;
Described database server, for the service data that the access instruction stored to described dispatch terminal module sends is relevant;
Described standby database server, for the service data that the access instruction stored to described dispatch terminal module sends is relevant;
Described application server, for judging whether database server normally works: described application server, according to the status information obtained from database server, data simultaneous module, judges whether database server normally works; If described database server normally works, then the access instruction sent according to described dispatch terminal module carries out data access to described database server; And, described application server and standby database server carry out timing access test, to determine whether standby database server can be used, wherein, during access test, application server the access instruction of in the future self scheduling terminal module can not be converted to ADO data access to standby database server, and the service data when access test in standby server can not be employed server is sent to dispatch terminal module; If described database server breaks down, then the access instruction sent according to described dispatch terminal module carries out data access to standby database server; Wherein, during data access, be converted to ADO data access by the access instruction of application server self scheduling terminal module in future;
Described data simultaneous module, for sending the status information of described database server and standby database server to described application server.
6. system according to claim 5, is characterized in that, described data simultaneous module comprises:
First synchronous submodule, for when described database server and described standby database server all normally work, replaces the service data in described standby database server by the service data that database server described in a period of time is preserved.
7. system according to claim 5, is characterized in that, described application server comprises:
Instruction sub module stored: the sequencing for the access instruction issuing time according to described dispatch terminal module is stored in special stack list, every bar instruction only just can by complete deletion after database information or the success of standby database Information Access, do not access successful instruction such as prosthetic to delete, will repeat within the regular hour.
8. system according to claim 5, is characterized in that, described application server also comprises application server detection submodule, and described data simultaneous module also comprises data syn-chronization detection submodule, two synchronous submodule and switching submodule:
Application server detection submodule, for the malfunction of timing probe data storehouse server after described database server breaks down;
Data syn-chronization detection submodule, for the malfunction of timing probe data storehouse server after described database server breaks down;
Second synchronous submodule, for carrying out the timing probe in N number of cycle determine that described database server enables synchronous mode after all normally working when application server detection submodule and described data syn-chronization detect submodule: the service data that standby database server described in a period of time is preserved is replaced the service data in described database server, described N is positive integer;
Described switching submodule, for normally carrying out M all after date when the described synchronous mode of the described second synchronous submodule, by data access by described standby database Server switching extremely described database server, described M is positive integer.
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| CN107885618B (en) * | 2017-10-26 | 2021-03-30 | 广州市雷军游乐设备有限公司 | Data monitoring method, device, equipment and storage medium based on network game |
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