CN100336343C - Method for keeping multiple data copy consistency in distributed system - Google Patents
Method for keeping multiple data copy consistency in distributed system Download PDFInfo
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- CN100336343C CN100336343C CNB2004100804697A CN200410080469A CN100336343C CN 100336343 C CN100336343 C CN 100336343C CN B2004100804697 A CNB2004100804697 A CN B2004100804697A CN 200410080469 A CN200410080469 A CN 200410080469A CN 100336343 C CN100336343 C CN 100336343C
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Abstract
The present invention discloses a method for keeping the consistency of multiple data copies in a distributed system. By extending and defining a Qx interface between a manager and a surrogate and stipulating the operational mechanism of the surrogate, the information communication and the coordination between the background manager and the surrogate on the device side and the between the background manager and a micro control unit are realized, and further, the consistency of data copies in the entire process of information interaction, particularly when failure exists in the executing process is guaranteed. The core of the present invention lies in that a historical data copy is primarily memorized by the surrogate in a buffer mode, after execution succeeds, the copy which is memorized in a buffer mode is deleted, and when the execution fails, the process of consistence rollback is carried out according to the data copy memorized in a buffer mode. The method of the present invention improves the shortages existing in the one-to-many answering mechanism for command and message in the prior art in principle, and solves the problem of the inconsistency of the data copy existing between a gateway system and the device side, thereby, the security hidden trouble of network operation caused by that the command transferring mechanism of a distributed system in the device is avoided, and the device is guaranteed to operate stably and reliably.
Description
Technical field
The present invention relates to distributed communication system, relate in particular to have the complicated AM/BAM division of labor, the foreground must depend on the distributed communication system that work is carried out in the configuration on backstage.
Background technology
Transmitting network (comprising network management system) is the large-scale distributed system of a complexity, and its typical network structure model is divided into webmaster side and equipment side two large divisions as shown in Figure 1; The webmaster side comprises GUI (graphical user interface), MANAGER (manager) two parts, and equipment side comprises AGENT (succedaneum), MCU (micro-control unit) two parts; Wherein MANAGER is with the relation that between the AGENT is one-to-many, and AGENT is with also being the relation of one-to-many between the MCU.In this distributed system, by F mouth operation pass-along message, operate pass-along message by the Qx mouth between the MANAGER-AGENT, and AGENT carries out communication by the order of S mouth with each MCU (micro-control unit) on same backboard between the GUI-MANAGER.
Transmit the configuration of network based network management system and carry out work, work in order to break away from network management system simultaneously, network is all preserved the copy of configuration data at AGENT (succedaneum) and MCU (micro-control unit), so, in fact three parts of network configuration data are arranged in the system, be kept at MANAGER (manager), AGENT (succedaneum) and the MCU (micro-control unit) of webmaster side respectively.The consistency that guarantees this three piece of data is the basic premise of whole transmission network stabilization reliably working.
The course of work of initial webmaster and equipment side is: graphical user interface is handed down to the manager with the operation of F mouth; One or more of Qx mouth operations with correspondence after the manager analyzes are handed down to the succedaneum and carry out the preservation of configuration data copy; The succedaneum analyzes after receiving the Qx operation, and the S mouth order with correspondence is handed down to micro-control unit respectively, and refreshes the configuration data copy of oneself; The order that micro-control unit issues according to the succedaneum is equally carried out and the refresh data copy.We are referred to as the no response working method this mode.
The characteristics of no response working method are that the operation information transmission between each functional entity does not need to reply, and just think success as long as order has sent.Advantage is to realize simply; Maximum shortcoming is the implementation status that the downstream is not known in the upstream.Because in the network configuration process of reality, certain link that causes is carried out the abnormal conditions of failure and can not be avoided fully, therefore tends to cause the inconsistent of data.In order to improve this shortcoming, the course of work of webmaster and equipment side is generally and replys working method now.
The characteristics of this working method are replied formula, it is the only configuration data of refresh command correspondence and issue next command just after receiving correct replying of upstream entity, if and what receive is wrong replying, then stops further execution, and think that whole order fails; Have only and think just that after the order of all decomposition all runs succeeded whole order is successful.The working method of replying has guaranteed the consistency of upstream and downstream information to a certain extent.
Anatomize the working method of replying, still exist the inadequate natural endowment in the design: when graphical user interface is handed down to gerentocratic F mouth operation corresponding manager is handed down to succedaneum's a plurality of Qx mouths operation simultaneously, if a Qx operation failure in succedaneum's implementation wherein, the manager then thinks whole F mouth operation failure; The S mouth order success in fact that the Qx that the succedaneum carried out before but we can find to fail operation and corresponding micro-control unit are carried out, so Dui Ying data trnascription has also obtained refreshing; So and the manager is owing to think that F mouth operation failure does not carry out any data trnascription and upgrades, so caused having produced the inconsistent phenomenon of part between the data trnascription of manager, succedaneum, micro-control unit.This part success part failure and the inconsistent situation of data that causes is a very big potential safety hazard in engineering reality may cause serious harmful effect.
Summary of the invention
Problem to be solved of the present invention is exactly part success part failure and the inconsistent problem of each data trnascription data that causes in the distributed system command execution process in the prior art, proposes to keep in a kind of distributed system the method for a plurality of data copy consistencies.
Keep the method for a plurality of data copy consistencies in the distributed system, comprise following processing procedure:
Gerentocratic processing procedure:
Step 4, succedaneum receive and carry out Qx mouth operation successively, after the Qx mouth operation that whenever is finished all to manager's feedback operation response message;
If step 5 manager receives succedaneum's operation failure and replys, then return wrong message and give graphical user interface, and finish this F mouth operation;
Step 6 otherwise after whole operation successful respond of receiving the operation of this F mouth, upgrade this F mouth and operate in the manager and locate corresponding data trnascription, and return replying of running succeeded to graphical user interface, finish this F mouth operation;
Succedaneum's processing procedure:
The Qx mouth operation that steps A, succedaneum's receiving management person issue;
Step B, succedaneum carry out before this Qx mouth operation, the copy of the data that this Qx mouth operation of buffer memory can be changed;
Step C, succedaneum analyze this Qx mouth operation, and split into the order of corresponding one or more of S mouth;
Step D, succedaneum are handed down to micro-control unit successively with the order of S mouth;
Step e, micro-control unit receive and carry out the order of S mouth successively, all feed back the execution response message to the succedaneum after the S mouth order that whenever is finished;
If step F succedaneum receives whole S mouth command execution successful respond of this Qx mouth operation institute correspondence, then upgrade this Qx mouth and operate in the succedaneum and locate corresponding data trnascription, return this Qx mouth to the manager and operate successful respond;
If this F mouth of step G is operated pairing whole Qx mouth operation and all located to operate successfully the succedaneum, then delete succedaneum's data in buffer copy;
If step H succedaneum receives the execution failure of micro-control unit and replys, then
H1: the succedaneum returns this Qx mouth operation failure to the manager and replys;
H2: according to the sequence number of this Qx mouth operation, determine that this F mouth operates in pairing all the Qx mouth operations of succedaneum, and all data trnascriptions of definite succedaneum institute's buffer memory in this F mouth operating process;
H3: all Qx mouth operating data copies that the succedaneum recovers buffer memory are actual data trnascription;
H4: the succedaneum constructs corresponding S mouth order, and is handed down to micro-control unit according to the data in buffer copy, and the data trnascription that recovers micro-control unit is the state before this F mouth operation;
H5: the succedaneum deletes the data in buffer copy;
The processing procedure of micro-control unit:
Step I: micro-control unit receives the S mouth order that the succedaneum issues;
Step II: micro-control unit is analyzed the S mouth order that receives, and according to analysis result equipment is carried out corresponding operation;
Step II I: if run succeeded, then update command institute corresponding data copy returns replying of running succeeded to the succedaneum, finishes this S mouth command execution;
Step IV: if carry out failure, then return and carry out replying of failure, finish this S mouth command execution to the succedaneum.
Above-mentioned sequence number identifies in the heading of Qx mouth operation.
Method of the present invention, the perfect deficiency that exists in the one-to-many command messages acknowledgement mechanism the prior art on principle, network management system and equipment side problem have been avoided, the problem includes: the inconsistent problem of data trnascription, thereby the network operation potential safety hazard of having avoided equipment to cause owing to distributed system command pass through mechanism imperfection, the reliable and stable operation of the equipment that guaranteed.Obviously the present invention also is not limited to the transmission network field, and method of the present invention also can be applicable to have in other distributed systems of similarity.
Description of drawings
Fig. 1 is the system configuration schematic diagram of distributed transmission network;
Fig. 2 is a gerentocratic process chart in the proposition method of the present invention;
Fig. 3 is the process chart of succedaneum in the proposition method of the present invention;
Fig. 4 is the workflow diagram of succedaneum when S mouth command execution is unusual among the present invention;
Fig. 5 is the process chart of micro-control unit in the proposition method of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the system configuration schematic diagram of distributed transmission network.As shown in Figure 1, distributed transmission network system comprises graphical user interface, manager, succedaneum, micro-control unit four parts; Wherein the manager is with being many-one relationship between the succedaneum, and the succedaneum is with also being the relation of one-to-many between the micro-control unit.Usually, claim that graphical user interface, manager's two parts are the background net management system, succedaneum, micro-control unit two parts then are the main bodys of communication apparatus, and data trnascription is kept at manager, succedaneum and three parts of micro-control unit respectively.
Fig. 2 is a gerentocratic process chart in the proposition method of the present invention.As shown in Figure 2, gerentocratic processing procedure comprises: 1, graphical user interface issues a F mouth and operates to the manager; 2, the manager analyzes, and this order is split into one or more of Qx mouth operations to the succedaneum; 3, the manager is handed down to the succedaneum successively with the operation of Qx mouth, and indicates the sequence number of this operation in Qx operation message, and to the last item order, sequence number is 0xfefe; 4, judge whether that at first all Qx mouth operations all send end? if 5 do not finish, then next bar Qx operation is sent to the succedaneum; If 6 are all over, then upgrade this F mouth and operate in the data trnascription that the manager locates correspondence, and return replying of running succeeded to graphical user interface, finish this F mouth operation.7, the manager receives replying of succedaneum; 1) if step 4 is then arrived in replying of success; 2), and finish this F mouth operation if replying of failure then directly returned wrong message to graphical user interface.Wherein, sequence number can identify in the heading of Qx mouth operation, and Qx interface command descriptor format is in the prior art:
The order source address | The order destination address | Command code | The order unique identification | Command execution results | Command body length | Command body |
Having identified the Qx interface command descriptor format behind the sequence number among the present invention is:
The order source address | The order destination address | Command code | The order unique identification | The sequence of operation number | Command execution results | Command body length | Command body |
Fig. 3 is the process chart of succedaneum in the proposition method of the present invention.As shown in Figure 3, succedaneum's processing procedure comprises: 1, the succedaneum receives the Qx mouth operation that the manager issues; 2, the succedaneum carries out before this Qx mouth operation, at first the copy of the data of this Qx mouth operation meeting change of buffer memory; 3, the succedaneum analyzes this Qx mouth operation, and splits into the order of corresponding one or more of S mouth; 4, the succedaneum sends to micro-control unit successively with the order of S mouth; 5, judge whether that at first all S mouth operations all send end? if 6 do not finish, then next bar S mouth order is sent to micro-control unit; If 7 are all over, then upgrade this Qx mouth and operate in the data trnascription that the succedaneum locates correspondence, return replying of running succeeded then to the manager; If the corresponding whole Qx mouth operations of 8 F mouths operation all finish, then delete the corresponding data of Qx operation of succedaneum's buffer memory.If 9 succedaneums receive the execution failure of micro-control unit and reply, the workflow when then execution S mouth command execution as shown in Figure 4 is unusual: 1, at first return the manager and carry out replying of this Qx mouth operation failure; 2, according to the sequence of operation in the Qx operation message number, determine that this F mouth operates in pairing all Qx operations of succedaneum, and all data trnascriptions of definite succedaneum institute's buffer memory in this F mouth operating process; 3, the succedaneum to recover all Qx mouth operating data copies of buffer memory be the data trnascription of system's reality; 4, the succedaneum constructs corresponding S mouth order, and is handed down to micro-control unit according to the data in buffer copy, is this F mouth operation state before with the data trnascription that recovers micro-control unit; 5, the succedaneum deletes data in buffer.
Fig. 5 is the process chart of micro-control unit in the proposition method of the present invention.As shown in Figure 5, the processing procedure of micro-control unit comprises: 1, micro-control unit receives the S mouth order that the succedaneum issues; 2, micro-control unit to the S mouth order analyze, according to analysis result equipment is operated accordingly; If 3 run succeeded, update command corresponding data copy then, and replying to the succedaneum of returning success finish the bright execution of this S mouth.If 4 carry out failure, then return replying of failure, and finish this S mouth command execution to the succedaneum.
The detailed realization of the method for the invention is described below in conjunction with a specific embodiment.
In conjunction with transmission network system shown in Figure 1, the Qx mouth that the F mouth operation that issues with a graphical user interface is handed down to the succedaneum corresponding to three managers is operated, each Qx mouth operation is hypothesis corresponding to the order of three S mouths again, in order to guarantee the consistency of foreground and background data copy when taking place unusually, groundwork process of the present invention is as follows:
1, graphical user interface issues a F mouth configuration operation to the manager, and the manager analyzes, and splits, converts to three Qx operations to the succedaneum;
2, the manager identifies the sequence number of operation in heading, and issues article one Qx and operate to the succedaneum;
3, the succedaneum receives the Qx operation that the manager issues, (suppose that the corresponding data trnascription of this Qx operation is A, this data trnascription was A1 before this operation was carried out), at first buffer memory A1;
4, this Qx operation is analyzed, split, convert to three S mouth orders to micro-control unit;
5, the succedaneum is handed down to the order of article one S mouth corresponding micro-control unit in order;
6, Dui Ying micro-control unit receives that the S mouth order that the succedaneum issues carries out, and the data trnascription of success back change oneself also returns to replying of succedaneum's success;
7, the succedaneum receives the successful respond that micro-control unit returns, and continues issuing of second S mouth order;
8, micro-control unit receives that second S mouth command execution successfully upgrades data trnascription and return success;
9, the succedaneum receives the successful respond that micro-control unit returns, and continues issuing of the 3rd S mouth order;
10, micro-control unit receives that the 3rd S mouth command execution successfully upgrade data trnascription and return success;
11, the succedaneum receives the successful respond that micro-control unit returns, and judges that corresponding three the S mouths order of this Qx operation all runs succeeded, and refreshes the data trnascription of oneself, and then data trnascription is updated to A2 by A1; Report replying of manager's success then, and finish this Qx operation;
12, the manager receives article one Qx operation successful respond of succedaneum, then continues to issue second Qx mouth and operates to the succedaneum;
13, the succedaneum receives the second Qx operation that the manager issues, (suppose that it is B that the corresponding succedaneum of this Qx operation locates data trnascription, this data trnascription was B1 before this operation was carried out), at first buffer memory B1;
14, same corresponding three the S mouths order of second Qx operation; The succedaneum sends article one S mouth and orders to micro-control unit, and micro-control unit runs succeeded, and upgrades data trnascription and returns success and reply;
15, the succedaneum receives replying of success, and transmission second S mouth is ordered the micro-control unit to correspondence;
16, micro-control unit is carried out the order of S mouth, because the fault of equipment, this command execution failure is so return wrong replying to the succedaneum;
17, the succedaneum receives replying of micro-control unit execution error, returns second Qx operation and carries out replying to the manager of failure; The rollback that guarantees data copy consistency is simultaneously handled:
1) succedaneum's data that the operation of article one Qx mouth is corresponding are to carry out A1 before by copy A2 rollback;
2), construct corresponding three the S mouths order of article one Qx mouth operation, and all be handed down to micro-control unit, so that the data trnascription that recovers on the micro-control unit is this F mouth operation state before based on data A1;
3) based on the data trnascription B1 of second Qx mouth correspondence, construct corresponding S mouth order, and article one is handed down to corresponding micro-control unit, recover the data trnascription on the micro-control unit;
18, the manager receives the response message of succedaneum's execution error, does not then do the renewal of any data, directly the operation of F mouth is considered as carrying out failure, returns to graphical user interface.
Claims (2)
1, keep the method for a plurality of data copy consistencies in the distributed system, it is characterized in that comprising following processing procedure:
Gerentocratic processing procedure:
Step 1, graphical user interface issue the F mouth and operate to the manager;
Step 2, manager analyze after receiving, and this operation is split into the one or more Qx mouth operation to the succedaneum;
Step 3, manager are handed down to the succedaneum successively with serialized Qx mouth operation;
Step 4, succedaneum receive and carry out Qx mouth operation successively, after the Qx mouth operation that whenever is finished all to manager's feedback operation response message;
If step 5 manager receives succedaneum's operation failure and replys, then return wrong message and give graphical user interface, and finish this F mouth operation;
Step 6 otherwise after whole operation successful respond of receiving the operation of this F mouth, upgrade this F mouth and operate in the manager and locate corresponding data trnascription, and return replying of running succeeded to graphical user interface, finish this F mouth operation;
Succedaneum's processing procedure:
The Qx mouth operation that steps A, succedaneum's receiving management person issue;
Step B, succedaneum carry out before this Qx mouth operation, the copy of the data that this Qx mouth operation of buffer memory can be changed;
Step C, succedaneum analyze this Qx mouth operation, and split into the order of corresponding one or more of S mouth;
Step D, succedaneum are handed down to micro-control unit successively with the order of S mouth;
Step e, micro-control unit receive and carry out the order of S mouth successively, all feed back the execution response message to the succedaneum after the S mouth order that whenever is finished;
If step F succedaneum receives whole S mouth command execution successful respond of this Qx mouth operation institute correspondence, then upgrade this Qx mouth and operate in the succedaneum and locate corresponding data trnascription, return this Qx mouth to the manager and operate successful respond;
If this F mouth of step G is operated pairing whole Qx mouth operation and all located to operate successfully the succedaneum, then delete succedaneum's data in buffer copy;
If step H succedaneum receives the execution failure of micro-control unit and replys, then
H1: the succedaneum returns this Qx mouth operation failure to the manager and replys;
H2: according to the sequence number of this Qx mouth operation, determine that this F mouth operates in pairing all the Qx mouth operations of succedaneum, and all data trnascriptions of definite succedaneum institute's buffer memory in this F mouth operating process;
H3: all Qx mouth operating data copies that the succedaneum recovers buffer memory are actual data trnascription;
H4: the succedaneum constructs corresponding S mouth order, and is handed down to micro-control unit according to the data in buffer copy, and the data trnascription that recovers micro-control unit is the state before this F mouth operation;
H5: the succedaneum deletes the data in buffer copy;
The processing procedure of micro-control unit:
Step I: micro-control unit receives the S mouth order that the succedaneum issues;
Step II: micro-control unit is analyzed the S mouth order that receives, and according to analysis result equipment is carried out corresponding operation;
Step II I: if run succeeded, then update command institute corresponding data copy returns replying of running succeeded to the succedaneum, finishes this S mouth command execution;
Step IV: if carry out failure, then return and carry out replying of failure, finish this S mouth command execution to the succedaneum.
2, method according to claim 1 is characterized in that: described sequence number identifies in the heading of Qx mouth operation.
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Families Citing this family (10)
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ATE541397T1 (en) | 2008-02-27 | 2012-01-15 | Nokia Corp | TRANSPORT INDEPENDENT ARCHITECTURE |
US9825863B2 (en) | 2008-02-27 | 2017-11-21 | Nokia Technologies Oy | Buffer control for multi-transport architectures |
CN102033786B (en) * | 2010-11-04 | 2013-02-06 | 曙光信息产业股份有限公司 | Method for repairing consistency of copies in object storage system |
CN102055799B (en) * | 2010-12-09 | 2014-02-12 | 北京世纪互联宽带数据中心有限公司 | Content refreshing system |
CN102317901B (en) * | 2011-07-25 | 2013-09-11 | 华为技术有限公司 | Methods for object adjustment and devices for remove control, node and storage system |
CN102347866A (en) * | 2011-11-08 | 2012-02-08 | 迈普通信技术股份有限公司 | Data configuration system and method in network management |
CN102609454B (en) * | 2012-01-12 | 2013-09-18 | 浪潮(北京)电子信息产业有限公司 | Replica management method for distributed file system |
CN103294787A (en) * | 2013-05-21 | 2013-09-11 | 成都市欧冠信息技术有限责任公司 | Multi-copy storage method and multi-copy storage system for distributed database system |
CN105550230B (en) * | 2015-12-07 | 2019-07-23 | 北京奇虎科技有限公司 | The method for detecting and device of distributed memory system node failure |
CN106375416B (en) * | 2016-08-30 | 2019-08-09 | 北京航空航天大学 | Consistency dynamic adjusting method and device in distributed data-storage system |
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