CN102143194A - Data synchronization method and system, immediate data node and terminal data node - Google Patents
Data synchronization method and system, immediate data node and terminal data node Download PDFInfo
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Abstract
The invention provides a data synchronization method and system, an immediate data node and a terminal data node. The data synchronization method comprises the steps of receiving a data synchronization message transmitted by a previous data node, wherein the data synchronization message includes a data synchronization identifier and data to be synchronized; carrying out data synchronization and recording a synchronization processing state based on the data synchronization identifier and the data to be synchronized, wherein the synchronization processing state is associated with the data synchronization identifier; transmitting the data synchronization message to a next data node so that the next data node carries out the data synchronization and records the synchronization processing state based on the data synchronization message; and receiving a feedback message transmitted by the next data node, changing the synchronization processing state associated with the data synchronization identifier and transmitting the feedback message to the previous data node; and thus, the data consistency of multiple nodes during data synchronization is ensured.
Description
Technical field
The invention belongs to network communications technology field, relate to a kind of method, system, intermediate data node of data sync and stop back end.
Background technology
In communication network, because user data or service subscription data need be shared between a plurality of systems, the isolated data of network isolated before making are more and more shared between a plurality of systems.Therefore, new client and user data will require just than higher for data consistency between a plurality of systems synchronously like this.Traditional inter-system data is mutual, guarantees data consistency if desired, can adopt data to subscribe to and informing mechanism, and notice can adopt broadcast mode, can realize data synchronization.
In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art:
When above-mentioned employing broadcast mode carries out synchrodata, in case when synchronization failure had taken place certain back end, other back end can not have been known this back end synchronization failure, the inconsistency of these data in the whole system at this moment may occur.
Summary of the invention
The invention provides a kind of method, system, intermediate data node of data sync and stop back end, guaranteed in the synchronizing process data consistency at a plurality of nodes, also meet BASE (Basically AVailble Soft-state Eventual Consistency, available substantially soft state affairs final consistency) strategy simultaneously.
The invention provides a kind of method of data sync, comprising:
Receive the data synchronization message that a data node sends, described data synchronization message has comprised the data sync sign and has needed data in synchronization;
According to described data sync sign and described needs data in synchronization, carry out data sync and record Synchronous Processing state, described Synchronous Processing state is associated with described data sync sign, and send data synchronization message to next number according to node, so that described next back end carries out data sync and record Synchronous Processing state according to described data synchronization message;
Receive the feedback message that described next back end sends, change the Synchronous Processing state that described data sync sign is associated, and send feedback message to a described last data node.
The invention provides the method for another kind of data sync, comprising:
Receive the data synchronization message that the intermediate data node sends, described data synchronization message has comprised the data sync sign and has needed data in synchronization;
According to described data sync sign and described needs data in synchronization, carry out data sync and record Synchronous Processing state, described Synchronous Processing state is associated with described data sync sign, and to described intermediate data node transmission feedback message, so that described intermediate data node, is changed the Synchronous Processing state that described data sync sign is associated according to described feedback message.
The invention provides a kind of intermediate data node, comprising:
Data synchronization message first receiving element is used to receive the data synchronization message that a data node sends, and described data synchronization message has comprised the data sync sign and needed data in synchronization;
The synchrodata processing unit, be used for according to described data sync sign and described needs data in synchronization, carry out data sync and record Synchronous Processing state, described Synchronous Processing state is associated with described data sync sign, and send data synchronization message to next number according to node, so that described next back end carries out data sync and record Synchronous Processing state according to described data synchronization message;
The feedback message receiving element is used to receive the feedback message that described next back end sends, and changes the Synchronous Processing state that described data sync sign is associated, and sends feedback message to a described last data node.
The present invention also provides a kind of termination back end, comprising:
Data synchronization message second receiving element is used to receive the data synchronization message that the intermediate data node sends, and described data synchronization message has comprised the data sync sign and needed data in synchronization;
The feedback message transmitting element, be used for according to described data sync sign and described needs data in synchronization, carry out data sync and record Synchronous Processing state, described Synchronous Processing state is associated with described data sync sign, and to described intermediate data node transmission feedback message, so that described intermediate data node, is changed the Synchronous Processing state that described data sync sign is associated according to described feedback message.
The present invention also provides a kind of data synchronization system, comprising: 1 or 1 above intermediate data node, and stop back end, wherein
Described intermediate data node is used to receive the data synchronization message that a data node sends, and described data synchronization message has comprised the data sync sign and needed data in synchronization; According to described data sync sign and described needs data in synchronization, carry out data sync and record Synchronous Processing state, described Synchronous Processing state is associated with described data sync sign, and send data synchronization message to next number according to node, so that described next back end carries out data sync and record Synchronous Processing state according to described data synchronization message; Receive the feedback message that described next back end sends, change the Synchronous Processing state that described data sync sign is associated, and send feedback message to a described last data node;
Described termination back end is used to receive the data synchronization message that the intermediate data node sends, and described data synchronization message has comprised the data sync sign and needed data in synchronization; According to described data sync sign and described needs data in synchronization, carry out data sync and record Synchronous Processing state, described Synchronous Processing state is associated with described data sync sign, and to described intermediate data node transmission feedback message, so that described intermediate data node, is changed the Synchronous Processing state that described data sync sign is associated according to described feedback message.
The technical scheme that is provided by the embodiment of the invention described above as can be seen, by all back end in the system are sent data synchronization message, finish data sync by each back end that receives data synchronization message, and the one-level one-level upwards returns feedback message, guaranteed the data consistency when the data sync of a plurality of nodes.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The method of data synchronization of a kind of intermediate data node that Fig. 1 provides for embodiments of the invention;
A kind of method of data synchronization that stops back end that Fig. 2 provides for embodiments of the invention;
A kind of method of data synchronization that Fig. 3 provides for embodiments of the invention;
The data synchronization processing schematic flow sheet that has back end to log off that Fig. 4 provides for embodiments of the invention;
The method of a kind of synchrodata rollback that Fig. 5 provides for embodiments of the invention;
A kind of intermediate data node structure schematic diagram that Fig. 6 provides for embodiments of the invention;
The another kind of intermediate data node structure schematic diagram that Fig. 7 provides for embodiments of the invention;
A kind of termination data node structure schematic diagram that Fig. 8 provides for embodiments of the invention;
The another kind that Fig. 9 provides for embodiments of the invention stops data node structure schematic diagram;
A kind of data synchronization system schematic diagram that Figure 10 provides for embodiments of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Embodiments of the invention provide a kind of method of data sync, as shown in Figure 1, comprising:
Step 101: the intermediate data node receives the data synchronization message that a data node sends, and data synchronization message has comprised the data sync sign and needed data in synchronization.
In the synchronous process of data, has the intermediate data node more than 1 or 1; The intermediate data node has two adjacent back end, promptly goes up a data node and next back end, and a last data node sends data synchronization message to the intermediate data node, and the intermediate data node sends data synchronization message to next number according to node; Last data node here can be the initial data node, also can be the intermediate data node, and this moment, this intermediate data node received the data synchronization message that another back end sends.
Step 102: the intermediate data node is according to data sync sign and needs data in synchronization, carry out data sync and record Synchronous Processing state, the Synchronous Processing state is associated with the data sync sign, and send data synchronization message to next number according to node, so that described next back end carries out data sync and record Synchronous Processing state according to described data synchronization message.
The next back end here can be to stop back end, also can be the intermediate data node, and this moment, this intermediate data node sent data synchronization message to another back end.And after the success synchronously of intermediate data node data, the Synchronous Processing state that the record data sync id is associated is the successful state of expression.
Step 103: the intermediate data node receives the feedback message that described next back end sends, the Synchronous Processing state that change data sync sign is associated, and to described last data node transmission feedback message.
The intermediate data node changes to the state that expression finishes with the Synchronous Processing state that described data sync sign is associated.
Said method also comprises: when middle back end Synchronous Processing is failed, write down the state of synchronous treatment state for the expression failure, and to described last data node transmission rollback message, described rollback message data sync identifies and needs data in synchronization, so that a described last data node carries out the synchrodata rollback according to described rollback message.
Said method also comprises: after the intermediate data node receives the rollback message of described next back end transmission, described rollback message data sync sign and need data in synchronization, data before returning to the corresponding synchronously successful data of described data sync sign synchronously, delete the corresponding Synchronous Processing state of this data sync sign, and described rollback message is sent to a last data node.
The technical scheme that is provided by the embodiment of the invention described above as can be seen, by all back end in the system are sent data synchronization message, finish data sync by each back end that receives data synchronization message, and the one-level one-level is upwards returned feedback message, guaranteed the data consistency when the data sync of a plurality of nodes, also meet the BASE strategy simultaneously,, but can reach the final data consistency even there are of short duration data inconsistent.
Embodiments of the invention provide the method for another kind of data sync, as shown in Figure 2, comprising:
Step 201: stop back end and receive the data synchronization message that the intermediate data node sends, described data synchronization message has comprised the data sync sign and has needed data in synchronization;
Step 202: stop back end according to data sync sign and described needs data in synchronization, carry out data sync and record Synchronous Processing state, the Synchronous Processing state is associated with the data sync sign, and to intermediate data node transmission feedback message, so that the intermediate data node, is changed the Synchronous Processing state that the data sync sign is associated according to feedback message.
Said method also comprises: when stopping the failure of back end Synchronous Processing, record Synchronous Processing state is the state of expression failure, and to described intermediate data node transmission rollback message, described rollback message data sync identifies and needs data in synchronization, so that described intermediate data node carries out the synchrodata rollback according to described rollback message.
The technical scheme that is provided by the embodiment of the invention described above as can be seen, by all back end in the system are sent data synchronization message, finish data sync by each back end that receives data synchronization message, and the one-level one-level is upwards returned feedback message, guaranteed the data consistency when the data sync of a plurality of nodes, also meet the BASE strategy simultaneously,, but can reach the final data consistency even there are of short duration data inconsistent.
Embodiments of the invention provide a kind of method of data sync, after the intermediate data node receives data synchronization message, carry out data synchronization processing according to data synchronization message, send to next intermediate data node then, and record Synchronous Processing state; After the termination back end receives data synchronization message, at first carry out data synchronization processing according to data synchronization message, upwards an intermediate data node sends feedback message then; After the intermediate data node receives feedback message, upgrade the Synchronous Processing state, and continue up intermediate data node transmission feedback message, receive feedback information up to the initial data node, at this moment a data synchronizing process has been finished.
As shown in Figure 3, back end 1 is the initial data node, and back end 2 and back end 3 are intermediate data nodes, back end 4 is for stopping back end, in a synchronizing process, may have a plurality of intermediate data nodes, just describe here with 2 intermediate data nodes.In synchronizing process, each back end needs its adjacent two data address of node, and (adjacent node refers to when data sync, certain node is an adjacent node with a last data node that sends data synchronization message to this back end, also the next back end with this back end transmission data synchronization message is an adjacent node, in Fig. 3, back end 2 and back end 3, and back end 3 is adjacent nodes with back end 4, the adjacent node that is back end 2 comprises back end 2 and back end 4), each back end can be stored the adjacent node address of this back end by doubly linked list, each back end information in the chain comprises: the URL of next back end (Uniform Resource Locator, the unified resource location), the URL of a last data node, and the definition of the message format of notebook data node.Before data sync, can send the address (i.e. a last address of node of this back end and the address of next node) of the adjacent node of this back end by a central server each back end in data sync, and clear and definite which back end is to stop back end, also can be by the above-mentioned doubly linked list of each back end self maintained, when in this data synchronization process, variation has taken place in each back end, then corresponding its doubly linked list of renewal of each back end in the address of adjacent node., need be forced to roll off the production line or initiatively roll off the production line because network sends fault when certain back end, need from chained list, delete this back end, and upgrade the value of the doubly linked list in the corresponding back end.Specifically can comprise:
Step 301, initial data node (back end 1) sends data synchronization message to next intermediate data node (back end 2), data synchronization message has comprised this data sync sign and has needed data in synchronization, wherein the data sync sign can be traffic sequence Business SerialNO, also can be the sessionID of this service conversation ID.
Particularly, if the synchronous renewal of self some data needs in the back end 1, at this moment back end 1 at first these data are carried out Synchronous Processing, in the process of Synchronous Processing, back end 1 is noted the Synchronous Processing state, and after the Synchronous Processing success, send data synchronization message according to node (back end 2) to next number; If the data in the back end 1 synchronously after, at this moment back end 1 just can be directly sends data synchronization message to next number according to node (back end 2).
In synchronizing process, state queue of each back end self maintained, this state queue can Hashization in internal memory, also can be persisted in the database, the transmission information that can comprise multiple Synchronous Processing state and data synchronization message in the state queue, as: the state information of Synchronous Processing can comprise (Processing) in the Synchronous Processing, success (Processed), failure (Failure) and end (Finished), these Synchronous Processing states are associated with this synchronous data identification, the embodiment of the invention is the occurrence of limits synchronization treatment state not, as long as can represent that above-mentioned four kinds of states are just passable, also can be such as above-mentioned four kinds of states with 1,2,3,4 expressions respectively, the embodiment of the invention has just adopted (Processing) in the above-mentioned processing for convenience, success (Processed), failure (Failure) and end (Finished) are described; The transmission information of data synchronization message can comprise last timestamp that sends of number of times, data synchronization message that data synchronization message repeats to send and the timestamp that obtains feedback message.
(Processing) represents that this back end is carrying out data synchronization processing in the wherein above-mentioned processing; This back end data sync success is represented in success (Processed), and can send data synchronization message to adjacent next back end; This back end failure of data synchronization is represented in failure (Failure), and need send failure of data synchronization message to an adjacent last data node, certainly this moment also might this back end owing to network reason or the reason of self the data node that can't make progress sends failure of data synchronization message, at this moment go up the feedback message of a data node by whether receiving that a default time this node sends, if overtime, then go up a data node and think this back end failure of data synchronization; After finishing feedback message that (Finished) represented that in the default time this back end receives that its next back end returns, a this back end upwards data node sends feedback message, and wherein feedback message represents that this back end successfully reaches the synchronizing process end of this back end synchronously.
Step 302 after back end 2 receives data synchronization message, is carried out data synchronization processing, if after the data synchronization processing success, send above-mentioned data synchronization message to next number according to node (back end 3), and note the Synchronous Processing state.
If after the success of back end 2 Synchronous Processing, then writing down above-mentioned Synchronous Processing state is successfully, and sends above-mentioned data synchronization message to next number according to node (back end 3); If after the failure of back end 2 Synchronous Processing, then write down above-mentioned Synchronous Processing state and be failure, and upwards a data node sends rollback message, the situation of handling failure elaborates at another embodiment, only introduces here and handles case of successful.
Step 303 after back end 3 receives data synchronization message, is carried out data synchronization processing, if after the data synchronization processing success, then continue to send above-mentioned data synchronization message to next number according to node (back end 4), and note the Synchronous Processing state.
Above-mentioned data synchronization processing is with the described data synchronization processing process of step 202.
Step 304, after back end 4 receives data synchronization message, carry out data synchronization processing, if after the data synchronization processing success, because back end 4 is termination back end of this data sync, therefore upwards a data node (back end 3) sends feedback message, and notes the Synchronous Processing state, wherein this feedback message has comprised the data sync sign, and the data sync that this data sync sign and step 201 data synchronization message to the step 203 is carried identifies identical.
Above-mentioned data synchronization processing is with the described data synchronization processing process of step 201.This moment, the Synchronous Processing state of back end 4 was end (Finished).
Step 305, after back end 3 receives feedback message, get access to the data sync sign, determined the corresponding data of this data sync sign the next back end (back end 4) of back end 3 data sync finish, and the corresponding Synchronous Processing state of this data sync sign is successfully (Processed), therefore upwards a data node (back end 2) sends feedback message, and upgrades the Synchronous Processing state for finishing (finished).
Step 306, after back end 2 receives feedback message, get access to the data sync sign, determined the corresponding data of this data sync sign the next back end (back end 3) of back end 2 data sync finish, and the corresponding Synchronous Processing state of this data sync sign changes to successfully (Processed), therefore upwards a data node (back end 1) sends feedback message, and upgrades the Synchronous Processing state for finishing (finished).
Step 307, after back end 1 receives feedback message, get access to the data sync sign, determined the corresponding data of this data sync sign the next back end (back end 2) of back end 1 data sync finish, and the state information of the Synchronous Processing that this data sync sign is corresponding is successfully (Processed), upgrade the Synchronous Processing state for finishing (finished), data sync success in this system.
Further, if in the flow process of whole transfer of data, certain back end logs off, do not need to receive data synchronization message, then can directly from central server (as the global synchronization nodal information hologram of accompanying drawing 4), revise, and the broadcasting change information is given each related data node, in the transmission course and transmission course of data synchronization message at feedback message, for to withdrawing from the back end that back end sends data, its link URL that sends data changes the next back end that withdraws from back end into by withdrawing from back end.If in system, need to increase synchronous nodal information, then can directly in global synchronization nodal information hologram, increase corresponding back end, the broadcasting change information is given each related data node, in the transmission course and transmission course of data synchronization message at feedback message, for the node that sends data to the increase back end, its link URL that sends data sends back end by former data and changes the increase back end into, increase back end and then increase the link URL that sends data, the above-mentioned former data of its target bit send back end.After using new topological mode, the data transmission procedure in the system does not need to interrupt.For example, the data synchronization processing flow process that has back end to log off can be with reference to figure 4, a last data node and the next back end change transmission target of the back end that withdraws from the data synchronization processing flow process are got final product, a last data node of the back end that promptly withdraws from directly sends to asynchronous data message the next back end of the back end that logs off, and the next node of the back end that withdraws from directly sends to feedback message a last data node of the back end that withdraws from.
It among the embodiment of above-mentioned Fig. 3 the equal case of successful of describing of each back end data sync, yet in some cases, the situation that failure of data synchronization can occur, the Synchronous Processing state that is certain back end is failure (Failure), send the timestamp of data synchronization message for the last time and time difference of obtaining between the timestamp of feedback message surpasses certain value such as: certain back end, perhaps do not receive feedback message, then can initiate to reform flow process by the initial data node, the concrete flow process of reforming can comprise the steps: that the initial data node sends the message of reforming to the intermediate data node, and the message of reforming comprises the data sync sign and needs data in synchronization; Each back end is after receiving the message of reforming, take out the data sync sign in the message header, and in state queue, search data sync sign, exist if find, then further check the corresponding Synchronous Processing state of data sync sign, if local Synchronous Processing is then carried out in failure (Failure) again, after the Synchronous Processing success, send to next back end; If local Synchronous Processing is then skipped in success (Processed) or finish (Finished), the message of directly will reforming sends to next back end, turns back to the initial data node up to the feedback message of the message of reforming.The above-mentioned flow process of reforming is applicable to the flow process to data sync response time-sensitive, if for insensitive flow process of data sync response time, can regularly initiate Procedure For Rework by back end, it is the scanning mode formation, get access to out the node of local Synchronous Processing state, then by node on this node or the initial initiation point initiation of the data flow process of reforming for failure (Failure).
In another embodiment, data synchronization message can also be carried the Synchronous Processing state of each back end, like this when certain back end Synchronous Processing failure, can fail than accurately locating which node Synchronous Processing faster, other synchrodata handling process is with the embodiment of Fig. 3 correspondence.
In addition, if through after the above-mentioned flow process of reforming, still exist certain back end Synchronous Processing state to be failure (Failure), perhaps preset time or predetermined send the data synchronization message of number of times after, when also not receiving corresponding feedback information, can be that the back end of failing is initiatively initiated the rollback flow process then by the Synchronous Processing state, carry out data scrubbing, data consistency with each back end in the assurance system, as shown in Figure 5, in the tentation data node 4 failure has taken place, rollback this moment flow process specifically can comprise the steps:
Step 501, the back end 4 of Synchronous Processing failure data node (back end 3) on it sends rollback message (Undo Message), and rollback message comprises the data sync sign identical with data synchronization message and needs data in synchronization;
Step 502, after back end 3 receives rollback message, if the corresponding Synchronous Processing state of above-mentioned data sync sign of back end 3 is successfully, then synchronously successful data are carried out rollback, rollback process comprises the data before returning to synchronously successful data synchronously, and delete the corresponding Synchronous Processing state of this data sync sign, the rollback processing sends to a last data node 2 with rollback message after finishing.
Step 503, back end 2 receives rollback message, if the corresponding Synchronous Processing state of above-mentioned data sync sign of back end 2 is successfully, then synchronously successful data are carried out rollback, rollback process comprises the data before returning to synchronously successful data synchronously, and delete the corresponding Synchronous Processing state of this data sync sign, the rollback processing sends to a last data node 1 with rollback message after finishing.
Step 504, back end 1 receives rollback message, if the corresponding Synchronous Processing state of above-mentioned data sync sign of back end 1 is successfully, then synchronously successful data are carried out rollback, rollback process comprises the data before returning to synchronously successful data synchronously, and delete the corresponding Synchronous Processing state of this data sync sign, because back end 1 is the synchrodata start node, this synchronous rollback process is finished, the all successful rollbacks of above-mentioned like this synchronizing process related all back end data guarantee the data consistency between each back end.
In above-mentioned rollback process, also can definition strategy, initiate by the initial data node, each back end receives rollback message, synchronously successful data to the notebook data node are carried out rollback, though the system that can guarantee like this is end-to-end inconsistent in certain time point data, can guarantee the final data consistency, be the specific implementation that meets the consistency BASE principle of loosening.And for a small amount of inconsistent data, can be by the repeatedly failure synchronously of deriving from state queue, perhaps the rollback data of repeatedly failing are carried out indivedual individual processing.
Adopt 1 couple of N synchronous because traditional distributed transaction is general, depend on the system and the maximum network time delay of the longest execution lock in time, and require system simultaneously online, the global reliability that forms synchronous N+1 level system is had relatively high expectations.Embodiments of the invention adopt 1 pair 1 transfer chain, have a bang path.The system that do not require is simultaneously online, and under the of short duration scene that withdraws from service of peer machine, present embodiment still can be realized synchronously.Embodiments of the invention are a kind of realizations that simply meet the BASE strategy, reached system's retractility, and the system failure is isolated the purpose of conciliating lotus root property, simultaneously can guarantee the final data consistency, inconsistent to the data that extremely indivedual reasons cause, can solve the two-stage affairs by rollback and submit the immemorial problem of failure to; Node off-line in the system, perhaps topology information changes, can non-interrupting service, can reform because of the service fail of individual nodes information-change simultaneously; Between the heterogeneous system of different development languages and framework, both improved the extended capability of system architecture, also met the BASE strategy simultaneously, and, but can reach the final data consistency even there are of short duration data inconsistent.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
Embodiments of the invention also provide a kind of intermediate data node, as shown in Figure 6, specifically can comprise data synchronization message first receiving element 61, be used to receive the data synchronization message that a data node sends, described data synchronization message has comprised the data sync sign and has needed data in synchronization; Synchrodata processing unit 62, be used for according to described data sync sign and described needs data in synchronization, carry out data sync and record Synchronous Processing state, described Synchronous Processing state is associated with described data sync sign, and send data synchronization message to next number according to node, so that described next back end carries out data sync and record Synchronous Processing state according to described data synchronization message; Feedback message receiving element 63 is used to receive the feedback message that described next back end sends, and changes the Synchronous Processing state that described data sync sign is associated, and sends feedback message to a described last data node.
Further, as shown in Figure 7, this intermediate data node also comprises: rollback message first transmitting element 64, be used for sending rollback message to a described last data node, described rollback message data sync identifies and needs data in synchronization, so that a described last data node carries out the synchrodata rollback according to described rollback message.
Further, as shown in Figure 7, this intermediate data node also comprises: rollback message receiving element 65, after being used to receive the rollback message of described next back end transmission, described rollback message data sync sign and need data in synchronization, data before returning to the corresponding synchronously successful data of described data sync sign are synchronously deleted the corresponding Synchronous Processing state of this data sync sign, and described rollback message is sent to a last data node.
Further, as shown in Figure 7, this intermediate data node also comprises: the processing unit 66 of reforming, be used to receive the message of reforming that a described last data node sends, and the described message of reforming comprises the data sync sign and needs data in synchronization; Determine that the Synchronous Processing state that described data sync sign is associated exists, and described Synchronous Processing state carries out local Synchronous Processing during for the state of expression failure again, after the Synchronous Processing success, send to next back end; Determine that perhaps the Synchronous Processing state that described data sync sign is associated exists, and described Synchronous Processing state is during for the state representing successfully or finish, the message of directly will reforming sends to described next back end; Determine that perhaps the Synchronous Processing state that described data sync sign is associated does not exist, carry out local Synchronous Processing, after the Synchronous Processing success, the message of will reforming sends to described next back end.
The embodiment of the processing capacity of each unit that comprises in the said apparatus is described in method execution mode before, no longer is repeated in this description at this.
Need to prove, in the execution mode of above intermediate data node, the division of each functional module only illustrates, can be as required in the practical application, facility such as the realization of the configuration requirement of corresponding hardware or software is considered, and the above-mentioned functions distribution is finished by different functional modules, the internal structure that is about to the processing unit of described video file broadcast is divided into different functional modules, to finish all or part of function described above.And in the practical application, corresponding functional modules in the present embodiment can be to be realized by relevant hardware, also can carry out corresponding software by relevant hardware finishes, for example, aforesaid data synchronization message first receiving element 61, can be for having the hardware of carrying out aforementioned functional, such as, receiver with this specific receiving ability, and other the general receiving systems that can carry out aforementioned functional, thereby also can be to carry out the general receiving equipment that the corresponding computer program is finished aforementioned functional, perhaps other hardware devices.
Embodiments of the invention also provide a kind of intermediate data node, as shown in Figure 8, specifically can comprise: data synchronization message second receiving element 81, be used to receive the data synchronization message that the intermediate data node sends, described data synchronization message has comprised the data sync sign and has needed data in synchronization; Feedback message transmitting element 82, be used for according to described data sync sign and described needs data in synchronization, carry out data sync and record Synchronous Processing state, described Synchronous Processing state is associated with described data sync sign, and to described intermediate data node transmission feedback message, so that described intermediate data node, is changed the Synchronous Processing state that described data sync sign is associated according to described feedback message.
Further, as shown in Figure 9, this termination back end also comprises: rollback message second transmitting element 83, be used for sending rollback message to described intermediate data node, described rollback message data sync identifies and needs data in synchronization, so that described intermediate data node carries out the synchrodata rollback according to described rollback message.
Certainly, this termination back end can also be used to receive the message of reforming that described intermediate data node sends, and the message of reforming comprises the data sync sign and needs data in synchronization; Synchronous Processing state that the specified data sync id is associated exists, and the Synchronous Processing state carries out local Synchronous Processing during for the state of expression failure again, after the Synchronous Processing success, sends to next back end; Determine that perhaps the Synchronous Processing state that described data sync sign is associated exists, and the Synchronous Processing state is during for the state representing successfully or finish, the message of directly will reforming sends to described next back end; Perhaps the Synchronous Processing state that is associated of specified data sync id does not exist, and carries out local Synchronous Processing, and after the Synchronous Processing success, the message of will reforming sends to described next back end.
Need to prove, in the execution mode of above intermediate data node, the division of each functional module only illustrates, can be as required in the practical application, facility such as the realization of the configuration requirement of corresponding hardware or software is considered, and the above-mentioned functions distribution is finished by different functional modules, the internal structure that is about to the processing unit of described video file broadcast is divided into different functional modules, to finish all or part of function described above.And in the practical application, corresponding functional modules in the present embodiment can be to be realized by relevant hardware, also can carry out corresponding software by relevant hardware finishes, for example, aforesaid data synchronization message second receiving element 81, can be for having the hardware of carrying out aforementioned functional, such as, receiver with this specific receiving ability, and other the general receiving systems that can carry out aforementioned functional, thereby also can be to carry out the general receiving equipment that the corresponding computer program is finished aforementioned functional, perhaps other hardware devices.
Embodiments of the invention also provide a kind of data synchronization system, as Figure 10, comprising: 1 or 1 above intermediate data node 1001, and stop back end 1002, wherein
Described termination back end 1002 is used to receive the data synchronization message that the intermediate data node sends, and described data synchronization message has comprised the data sync sign and needed data in synchronization; According to described data sync sign and described needs data in synchronization, carry out data sync and record Synchronous Processing state, described Synchronous Processing state is associated with described data sync sign, and to described intermediate data node transmission feedback message, so that described intermediate data node, is changed the Synchronous Processing state that described data sync sign is associated according to described feedback message.
Further, as shown in figure 10, data synchronization system also comprises: initial data node 1003, be used for sending data synchronization message to the intermediate data node, described data synchronization message has comprised the data sync sign and has needed data in synchronization, so that described intermediate data node carries out data sync and record Synchronous Processing state according to described data synchronization message.
Embodiments of the invention adopt 1 pair 1 transfer chain, have a bang path.The system that do not require is simultaneously online, and under the of short duration scene that withdraws from service of peer machine, present embodiment still can be realized synchronously.Embodiments of the invention are a kind of realizations that simply meet the BASE strategy, reached system's retractility, and the system failure is isolated the purpose of conciliating lotus root property, simultaneously can guarantee the final data consistency, inconsistent to the data that extremely indivedual reasons cause, can solve the two-stage affairs by rollback and submit the immemorial problem of failure to; Node off-line in the system, perhaps topology information changes, can non-interrupting service, can reform because of the service fail of individual nodes information-change simultaneously; Between the heterogeneous system of different development languages and framework, both improved the extended capability of system architecture, also met the BASE strategy simultaneously, and, but can reach the final data consistency even there are of short duration data inconsistent.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation 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 range of claim.
Claims (16)
1. the method for a data sync is characterized in that, comprising:
Receive the data synchronization message that a data node sends, described data synchronization message has comprised the data sync sign and has needed data in synchronization;
According to described data sync sign and described needs data in synchronization, carry out data sync and record Synchronous Processing state, described Synchronous Processing state is associated with described data sync sign, and send data synchronization message to next number according to node, so that described next back end carries out data sync and record Synchronous Processing state according to described data synchronization message;
Receive the feedback message that described next back end sends, change the Synchronous Processing state that described data sync sign is associated, and send feedback message to a described last data node.
2. method according to claim 1 is characterized in that, and is described according to described data sync sign and described needs data in synchronization, carries out data sync and record Synchronous Processing state, is specially:
According to described data sync sign and described needs data in synchronization, carry out data sync, after the data sync success, write down Synchronous Processing state that described data sync sign is associated for representing successful state.
3. method according to claim 1 is characterized in that, the feedback message that the described next back end of described reception sends is changed the Synchronous Processing state that described data sync sign is associated, and is specially:
Receive the feedback message that described next back end sends, the Synchronous Processing state that described data sync sign is associated changes to the state that expression finishes.
4. method according to claim 1, it is characterized in that, the Synchronous Processing state of described record is the state of expression failure, described method also comprises: send rollback message to a described last data node, described rollback message data sync identifies and needs data in synchronization, so that a described last data node carries out the synchrodata rollback according to described rollback message.
5. method according to claim 1, it is characterized in that, described method also comprises: after receiving the rollback message of described next back end transmission, described rollback message data sync sign and need data in synchronization, data before returning to the corresponding synchronously successful data of described data sync sign synchronously, delete the corresponding Synchronous Processing state of this data sync sign, and described rollback message is sent to a last data node.
6. method according to claim 1 is characterized in that, described method also comprises: receive the message of reforming that a described last data node sends, the described message of reforming comprises the data sync sign and needs data in synchronization;
Determine that the Synchronous Processing state that described data sync sign is associated exists, and described Synchronous Processing state carries out local Synchronous Processing during for the state of expression failure again, after the Synchronous Processing success, send to next back end; Perhaps
Determine that the Synchronous Processing state that described data sync sign is associated exists, and described Synchronous Processing state is during for the state representing successfully or finish, the message of directly will reforming sends to described next back end; Perhaps
Determine that the Synchronous Processing state that described data sync sign is associated does not exist, carry out local Synchronous Processing, after the Synchronous Processing success, the message of will reforming sends to described next back end.
7. the method for a data sync is characterized in that, comprising:
Receive the data synchronization message that the intermediate data node sends, described data synchronization message has comprised the data sync sign and has needed data in synchronization;
According to described data sync sign and described needs data in synchronization, carry out data sync and record Synchronous Processing state, described Synchronous Processing state is associated with described data sync sign, and to described intermediate data node transmission feedback message, so that described intermediate data node, is changed the Synchronous Processing state that described data sync sign is associated according to described feedback message.
8. method according to claim 7, it is characterized in that, the Synchronous Processing state of described record is the state of expression failure, described method also comprises: send rollback message to described intermediate data node, described rollback message data sync identifies and needs data in synchronization, so that described intermediate data node carries out the synchrodata rollback according to described rollback message.
9. an intermediate data node is characterized in that, comprising:
Data synchronization message first receiving element is used to receive the data synchronization message that a data node sends, and described data synchronization message has comprised the data sync sign and needed data in synchronization;
The synchrodata processing unit, be used for according to described data sync sign and described needs data in synchronization, carry out data sync and record Synchronous Processing state, described Synchronous Processing state is associated with described data sync sign, and send data synchronization message to next number according to node, so that described next back end carries out data sync and record Synchronous Processing state according to described data synchronization message;
The feedback message receiving element is used to receive the feedback message that described next back end sends, and changes the Synchronous Processing state that described data sync sign is associated, and sends feedback message to a described last data node.
10. intermediate data node according to claim 9, it is characterized in that, also comprise: rollback message first transmitting element, be used for sending rollback message to a described last data node, described rollback message data sync identifies and needs data in synchronization, so that a described last data node carries out the synchrodata rollback according to described rollback message.
11. intermediate data node according to claim 9, it is characterized in that, described intermediate data node also comprises: the rollback message receiving element, after being used to receive the rollback message of described next back end transmission, described rollback message data sync sign and need data in synchronization, data before returning to the corresponding synchronously successful data of described data sync sign synchronously, delete the corresponding Synchronous Processing state of this data sync sign, and described rollback message is sent to a last data node.
12. intermediate data node according to claim 9 is characterized in that, the processing unit of reforming is used to receive the message of reforming that a described last data node sends, and the described message of reforming comprises the data sync sign and needs data in synchronization; Determine that the Synchronous Processing state that described data sync sign is associated exists, and described Synchronous Processing state carries out local Synchronous Processing during for the state of expression failure again, after the Synchronous Processing success, send to next back end; Determine that perhaps the Synchronous Processing state that described data sync sign is associated exists, and described Synchronous Processing state is during for the state representing successfully or finish, the message of directly will reforming sends to described next back end; Determine that perhaps the Synchronous Processing state that described data sync sign is associated does not exist, carry out local Synchronous Processing, after the Synchronous Processing success, the message of will reforming sends to described next back end.
13. one kind stops back end, it is characterized in that, comprising:
Data synchronization message second receiving element is used to receive the data synchronization message that the intermediate data node sends, and described data synchronization message has comprised the data sync sign and needed data in synchronization;
The feedback message transmitting element, be used for according to described data sync sign and described needs data in synchronization, carry out data sync and record Synchronous Processing state, described Synchronous Processing state is associated with described data sync sign, and to described intermediate data node transmission feedback message, so that described intermediate data node, is changed the Synchronous Processing state that described data sync sign is associated according to described feedback message.
14. termination back end according to claim 13, it is characterized in that, also comprise: rollback message second transmitting element, be used for sending rollback message to described intermediate data node, described rollback message data sync identifies and needs data in synchronization, so that described intermediate data node carries out the synchrodata rollback according to described rollback message.
15. a data synchronization system is characterized in that, comprising: 1 or 1 above intermediate data node, and stop back end, wherein
Described intermediate data node is used to receive the data synchronization message that a data node sends, and described data synchronization message has comprised the data sync sign and needed data in synchronization; According to described data sync sign and described needs data in synchronization, carry out data sync and record Synchronous Processing state, described Synchronous Processing state is associated with described data sync sign, and send data synchronization message to next number according to node, so that described next back end carries out data sync and record Synchronous Processing state according to described data synchronization message; Receive the feedback message that described next back end sends, change the Synchronous Processing state that described data sync sign is associated, and send feedback message to a described last data node;
Described termination back end is used to receive the data synchronization message that the intermediate data node sends, and described data synchronization message has comprised the data sync sign and needed data in synchronization; According to described data sync sign and described needs data in synchronization, carry out data sync and record Synchronous Processing state, described Synchronous Processing state is associated with described data sync sign, and to described intermediate data node transmission feedback message, so that described intermediate data node, is changed the Synchronous Processing state that described data sync sign is associated according to described feedback message.
16. system according to claim 15, it is characterized in that, also comprise: the initial data node, be used for sending data synchronization message to the intermediate data node, described data synchronization message has comprised the data sync sign and has needed data in synchronization, so that described intermediate data node carries out data sync and record Synchronous Processing state according to described data synchronization message.
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