CN107153594A - The HA components of distributed data base system select main method and its system - Google Patents
The HA components of distributed data base system select main method and its system Download PDFInfo
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- G06F11/3003—Monitoring arrangements specially adapted to the computing system or computing system component being monitored
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Abstract
Main method and its system are selected the invention discloses a kind of HA components of distributed data base system, method includes：Each HA component sends write request to coordination component；Coordination component assigns each HA component and uniquely identified, obtain the related information of each corresponding mark of HA components respectively according to the write request；One HA components obtain the related information；The one HA components obtain corresponding mark according to the related information；Judge described identify whether as default host node mark.By introducing coordination component in the general frame of distributed data base, being in communication with each other between HA components is realized by coordination component, can prevent the efficiency of HA components reduces；The characteristics such as the Ordinal Consistency according to coordination component, assign each HA component and uniquely identify, and each HA component can be made according to the uniqueness of the mark, unique host node is determined, and then prevent fissure phenomenon.
Description
Technical field
The present invention relates to the HA groups in distributed data base field, more particularly to a kind of distributed data base system
Part selects main method and its system.
Background technology
Big data epoch, distributed data base turns into the necessary basis facility of data storage.Distributed data base
System be present, wherein, for most of application services, availability issue is one basic
Problem.High availability service to a certain degree is provided, is one of indispensable feature of distributed data base system.
There is the high-availability arrangement of many distributed data base systems at present, frequently with single node High Availabitity component
Carry out fault detect and troubleshooting.There is Single Point of Faliure in the program, when high availability component is abnormal in itself,
It will be unable to provide high availability service.
The distributed highly available system disposed for high availability component (HA components) multinode, can be solved
Certainly single-point problem.But, main and standby relation is must determine between multiple high availability component nodes, only main section
Point can be handled failure, and the otherwise operation of multiple high availability nodes easily causes conflict.If
Using fixed active and standby role relation, when host node is abnormal, other slave nodes can not carry out troubleshooting,
Therefore, such common scheme is using dynamic active and standby role relation.Active and standby section is determined by certain algorithm
Point, a node is selected as host node when host node is abnormal, then from slave node.Select main algorithm usual
It is more complicated, when unstable networks, easily there is fissure phenomenon, i.e. synchronization and exist more than one
Host node.And the algorithm of uniformity is can guarantee that in theory, such as common paxos algorithms, raft algorithms,
Realize relatively difficult, easily produce deadlock.
In the patent publication of Application No. 201410854727.6, it is proposed that one kind is applied to distribution
The method for solving the problems, such as 2PC model Single Point of Faliures of database, including：A row are set up from coordinator's queue,
Multiple websites are stored in as from coordinator, wherein being each identical from the function of coordinator and coordinator；Association
Communicated between tune person and multiple participants according to two-phase commitment protocol by packet；Meanwhile, coordinate
Person and all from once being communicated every a period between coordinator；If from coordinator in this period
The message of coordinator's transmission is not received afterwards, then it is assumed that coordinator blocks, system is immediately according to certain calculation
Method selects one to be communicated from coordinator as new coordinator with multiple participants from coordinator's queue.But
This method can not fully prevent fissure phenomenon, and need timing to communicate between coordinator, may drop
It is inefficient.
The content of the invention
The technical problems to be solved by the invention are：A kind of HA components choosing of distributed data base system is provided
Main method and its system, it may be determined that unique host node.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：A kind of distributed data base system
The HA components of system select main method, including：
Each HA component sends write request to coordination component；
Coordination component assigns each HA component and uniquely identified, obtain each respectively according to the write request
The related information of the corresponding mark of HA components；
One HA components obtain the related information；
The one HA components obtain corresponding mark according to the related information；
Judge described identify whether as default host node mark.
Main system is selected the invention further relates to a kind of HA components of distributed data base system, including：
Sending module, write request is sent to coordination component for each HA component；
Module is assigned, for coordination component according to the write request, each HA component is assigned respectively unique
Mark, obtains the related information of each corresponding mark of HA components；
First acquisition module, the related information is obtained for a HA components；
Second acquisition module, corresponding mark is obtained for the HA components according to the related information
Know；
Judge module, for judging described identify whether as default host node mark.
The beneficial effects of the present invention are：By introducing coordination component in the general frame of distributed data base,
Being in communication with each other between HA components is realized by coordination component, the efficiency of HA components can be improved；According to coordination
The characteristics such as the Ordinal Consistency of component, assign each HA component and uniquely identify, and can make each HA component root
According to the uniqueness of the mark, unique host node is determined, and then prevent fissure phenomenon.
Brief description of the drawings
Fig. 1 selects the flow chart of main method for a kind of HA components of distributed data base system of the invention；
Fig. 2 is the configuration diagram of the distributed data base system of the embodiment of the present invention one；
Fig. 3 is the method flow diagram of the embodiment of the present invention one；
Fig. 4 selects the structural representation of main system for a kind of HA components of distributed data base system of the invention；
Fig. 5 is the system structure diagram of the embodiment of the present invention two.
Label declaration：
1st, data-base cluster；2nd, HA components cluster；3rd, database broker；4th, coordination component；
101st, sending module；102nd, module is assigned；103rd, the first acquisition module；104th, second mould is obtained
Block；105th, judge module；106th, the first determination module；107th, the first removing module；108th, mould is notified
Block；109th, chosen module；110th, the second determination module；111st, the second removing module.
Embodiment
To describe technology contents, the objects and the effects of the present invention in detail, below in conjunction with embodiment simultaneously
Accompanying drawing is coordinated to be explained in detail.
The design of most critical of the present invention is：Role's distribution between HA components is realized based on coordination component,
According to unique mark, unique host node is determined.
Referring to Fig. 1, a kind of HA components of distributed data base system select main method, including：
Each HA component sends write request to coordination component；
Coordination component assigns each HA component and uniquely identified, obtain each respectively according to the write request
The related information of the corresponding mark of HA components；
One HA components obtain the related information；
The one HA components obtain corresponding mark according to the related information；
Judge described identify whether as default host node mark.
It was found from foregoing description, the beneficial effects of the present invention are：Can be according to unique mark, it is determined that uniquely
Host node, prevent fissure phenomenon.
Further, the write request includes and the unique corresponding HA module datas of HA components.
Seen from the above description, by uniquely corresponding to the HA module datas of HA components, each HA group can be made
Part uniquely gets corresponding mark, prevents the situation that a HA component gets multiple marks.
It is further, described that " coordination component assigns each HA component unique respectively according to the write request
Mark, obtain the related information of each corresponding mark of HA components " be specially：
Coordination component assigns each respectively according to the time order and function for the write request for receiving each HA component
One sequence number incremented by successively of HA components, obtains the related information of each HA component and its sequence number.
Seen from the above description, according to the characteristic of coordination component, each HA component corresponds to one and not repeated
Sequence number, can be according to judging whether unique sequence number is the pre- sequence number for electing standby host node as come quick
Determine unique host node in ground.
Further, after described " judging described identify whether as default host node mark ", further
Including：
If described be designated default host node mark, judge the HA components as host node；
If former host node failure, coordination component deletes the related information of the corresponding mark of former host node；
Coordination component sends the abnormal event of the former host node and notifies to give each HA component；
It is selected to have determined that for the HA components of host node be new host node.
Further, after described " judging described identify whether as default host node mark ", further
Including：
If the mark is not default host node mark, judge the HA components as from node；
If from node failure, coordination component deletes the related information from the corresponding mark of node.
Seen from the above description, in nodes break down, coordination component is automatically deleted corresponding related information,
The node for preventing failure is chosen as the situation of host node；If host node breaks down, then start and
New host node is normally selected from node, Single Point of Faliure is solved the problems, such as, high availability can be continued executing with
Function.
Fig. 4 is refer to, the present invention also proposes that a kind of HA components of distributed data base system select main system, wraps
Include：
Sending module, write request is sent to coordination component for each HA component；
Module is assigned, for coordination component according to the write request, each HA component is assigned respectively unique
Mark, obtains the related information of each corresponding mark of HA components；
First acquisition module, the related information is obtained for a HA components；
Second acquisition module, corresponding mark is obtained for the HA components according to the related information
Know；
Judge module, for judging described identify whether as default host node mark.
Further, the write request includes and the unique corresponding HA module datas of HA components.
Further, it is described imparting module specifically for coordination component according to receiving each HA component
The time order and function of write request, assigns each HA component one sequence number incremented by successively, obtains each respectively
The related information of HA components and its sequence number.
Further, in addition to：
First determination module, if being designated default host node mark for described, judges a HA
Component is host node；
First removing module, if for former host node failure, it is corresponding that coordination component deletes former host node
The related information of mark；
Notification module, sends the abnormal event of the former host node for coordination component and notifies to give each HA group
Part；
Chosen module, has determined that for the HA components of host node be new host node for selected.
Further, in addition to：
Second determination module, if not being default host node mark for the mark, judges a HA
Component is from node；
Second removing module, if for from node failure, coordination component to be deleted described corresponding from node
The related information of mark.
Embodiment one
Fig. 1 is refer to, embodiments of the invention one are：A kind of HA components choosing master of distributed data base system
Method, refer to Fig. 2, the distributed data base system include data-base cluster 1, HA components cluster 2,
Database broker 3 and coordination component 4.The data-base cluster 1 is made up of at least one database group, one
Database group is comprising a main database node with least one for database node.The HA components cluster 2
In HA components provide data-base cluster 1 high-availability feature.The coordination component 4 preserves data base set
1 information of group, including all database groups and the active and standby information of database node therein etc., work as database
When the information of cluster 1 changes, proactive notification database broker 3 and HA components.The database broker 3
The whole information of data-base cluster 1 is read from coordination component 4, according to certain burst rule, by client
Request is routed to corresponding database node.When the information of data-base cluster 1 changes, by coordination component 4
Notification database acts on behalf of 3 fresh informations.HA components from the information of 4 reading database cluster of coordination component 1, with
Fault detect periodically is carried out to database node afterwards, if faulty occur, corresponding troubleshooting is carried out.
The HA components are using distributed multinode deployment, it is to avoid single-point problem.Each HA components have two kinds
Role state, host node and from node.In the HA components cluster 2 of a distributed deployment, synchronization
Have and only one of which HA component nodes are host nodes, other HA component nodes are from node.
The coordination component 4 can multinode distributed deployment, and should have following feature：
Ordinal Consistency, the sequential update data of request are sent according to client；
Atomicity, otherwise success is updated, otherwise failure, is not in that part updates；
Unicity, no matter which node is client connect, and can all see same view；
Reliability, once data are updated successfully, will be always maintained at, until new renewal；
Promptness, client can obtain newest data within the time of a determination.
Solid line in Fig. 2 represents data transfer, and chain-dotted line represents heartbeat, and dotted line represents to monitor.
The coordination component 4 be able to can also be used as zookeeper, ETCD etc. increase income with independent development
Distributed application program coordination service software.Exemplified by the present embodiment is using zookeeper as coordination component 4.
Fig. 3 is refer to, methods described comprises the following steps：
S1：Start HA components；For example, it is respectively HA_x, HA_y, HA_z to start ID in HA component clusters
Three HA components.
S2：After the HA components start, automatic connection coordination component zookeeper.
S3：Each HA component sends write request to coordination component, and the write request includes unique with HA components
Corresponding HA module datas；For example, each HA component saves respective node ID with transient node and order
The mode of point is write in the coordination component zookeeper.
S4：Coordination component assigns each HA component and uniquely identified respectively according to the write request, obtains each
The related information of the individual corresponding mark of HA components；Alternatively, coordination component is according to receiving each HA component
Write request time order and function, assign each HA component one sequence number incremented by successively respectively, so as to obtain
The related information of each HA component and its sequence number；For example, coordination component zookeeper is according to actually receiving
Write the time asked clearly, write-in includes the data of node ID and an incremental sequence number, that is to say, that
The data that zookeeper finally writes are HA_x_0001, HA_y_0002 and HA_z_0003.
S5：Each HA component obtains the related information from coordination component；For example, from coordination component
The data finally write are obtained in zookeeper.
S6：Each HA component obtains corresponding mark according to the related information；For example, ID is HA_x
HA components obtain HA_x_0001, HA_y_0002 and HA_z_0003, by self ID and HA_x_0001,
HA_y_0002 and HA_z_0003 are contrasted, and obtain itself corresponding Serial No. 001.
S7：Each HA component judges described identify whether as default host node mark；For example, default alternative
Host node be the minimum HA components of sequence number, then each HA components will determine that itself corresponding sequence number
It is whether minimum, if so, S8 is performed, if it is not, performing S9；Alternatively it is also possible to which default host node is sequence
Number maximum HA components.
S8：The HA components are judged as host node, and the role of itself is set to host node by the HA components,
Start the function of execution host node.
S9：Judge the HA components as from node.
S10：The HA components of all startups monitor coordination component, i.e. host node and coordination group are all monitored from node
Part.
S11：If there is node failure, whether the node of failure judgement is host node, if it is not, S12 is performed, if
It is to perform S13.
S12：Coordination component deletes the related information from the corresponding mark of node.
S13：Coordination component deletes the related information of the corresponding mark of host node, and sends host node exception
Event notifies, to from node, step S5 to be performed from node.
Ordinal Consistency characteristic of the present embodiment based on coordination component, will not there is two HA components correspondence phases simultaneously
Same sequence number, this guarantees the HA component only one of which of correspondence minmal sequence number, so that it is determined that going out unique
Host node, prevent fissure phenomenon.
Embodiment two
Fig. 5 is refer to, the present embodiment is a kind of distributed data base system of the method for correspondence embodiment one
HA components select main system, including：
Sending module 101, write request is sent to coordination component for each HA component；
Module 102 is assigned, for coordination component according to the write request, each HA component is assigned respectively unique
Mark, obtain the related information of each corresponding mark of HA components；The write request includes and HA groups
The unique corresponding HA module datas of part.Alternatively, the imparting module 102 is specifically for coordination component root
According to the time order and function for the write request for receiving each HA component, each HA component one is assigned respectively successively
Incremental sequence number, obtains the related information of each HA component and its sequence number.
First acquisition module 103, the related information is obtained for a HA components；
Second acquisition module 104, obtains corresponding for the HA components according to the related information
Mark；
Judge module 105, for judging described identify whether as default host node mark.
The system also includes：
First determination module 106, if being designated default host node mark for described, judges described one
HA components are host node；
First removing module 107, if for former host node failure, it is right with it that coordination component deletes former host node
The related information that should be identified；
Notification module 108, sends the abnormal event of the former host node for coordination component and notifies to give each HA
Component；
Chosen module 109, has determined that for the HA components of host node be new host node for selected.
The system also includes
Second determination module 110, if not being default host node mark for the mark, judges described one
HA components are from node；
Second removing module 111, if for from node failure, coordination component to be deleted described right with it from node
The related information that should be identified.
In summary, the HA components of a kind of distributed data base system that the present invention is provided select main method and its
System, by introducing coordination component in the general frame of distributed data base, HA is realized by coordination component
Being in communication with each other between component, can improve the efficiency of HA components；By the HA groups for uniquely corresponding to HA components
Number of packages evidence, can make each HA component uniquely get corresponding mark, prevent a HA component
Get the situation of multiple marks；The characteristics such as the Ordinal Consistency according to coordination component, each HA component is equal
One unduplicated sequence number of correspondence, can be according to judging whether unique sequence number is pre- to elect standby host node as
Sequence number quickly determine out unique host node, prevent fissure phenomenon.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, every profit
The equivalents made with description of the invention and accompanying drawing content, or directly or indirectly it is used in the technology of correlation
Field, is included within the scope of the present invention.
Claims (10)
1. a kind of HA components of distributed data base system select main method, it is characterised in that：Including：
Each HA component sends write request to coordination component；
Coordination component assigns each HA component and uniquely identified, obtain each respectively according to the write request
The related information of the corresponding mark of HA components；
One HA components obtain the related information；
The one HA components obtain corresponding mark according to the related information；
Judge described identify whether as default host node mark.
2. a kind of HA components of distributed data base system according to claim 1 select main method, its
It is characterised by：The write request includes and the unique corresponding HA module datas of HA components.
3. a kind of HA components of distributed data base system according to claim 1 select main method, its
It is characterised by：It is described that " coordination component assigns each HA component and uniquely marked respectively according to the write request
Know, obtain the related information of each corresponding mark of HA components " be specially：
Coordination component assigns each respectively according to the time order and function for the write request for receiving each HA component
One sequence number incremented by successively of HA components, obtains the related information of each HA component and its sequence number.
4. a kind of HA components of distributed data base system according to claim 1 select main method, its
It is characterised by：After described " judging described identify whether as default host node mark ", further comprise：
If described be designated default host node mark, judge the HA components as host node；
If former host node failure, coordination component deletes the related information of the corresponding mark of former host node；
Coordination component sends the abnormal event of the former host node and notifies to give each HA component；
It is selected to have determined that for the HA components of host node be new host node.
5. a kind of HA components of distributed data base system according to claim 1 select main method, its
It is characterised by：After described " judging described identify whether as default host node mark ", further comprise：
If the mark is not default host node mark, judge the HA components as from node；
If from node failure, coordination component deletes the related information from the corresponding mark of node.
6. a kind of HA components of distributed data base system select main system, it is characterised in that：Including：
Sending module, write request is sent to coordination component for each HA component；
Module is assigned, for coordination component according to the write request, each HA component is assigned respectively unique
Mark, obtains the related information of each corresponding mark of HA components；
First acquisition module, the related information is obtained for a HA components；
Second acquisition module, corresponding mark is obtained for the HA components according to the related information
Know；
Judge module, for judging described identify whether as default host node mark.
7. a kind of HA components of distributed data base system according to claim 6 select main system, its
It is characterised by：The write request includes and the unique corresponding HA module datas of HA components.
8. a kind of HA components of distributed data base system according to claim 6 select main system, its
It is characterised by：The imparting module is write specifically for coordination component according to receiving each HA component please
The time order and function asked, assigns each HA component one sequence number incremented by successively, obtains each HA group respectively
The related information of part and its sequence number.
9. a kind of HA components of distributed data base system according to claim 6 select main system, its
It is characterised by：Also include：
First determination module, if being designated default host node mark for described, judges a HA
Component is host node；
First removing module, if for former host node failure, it is corresponding that coordination component deletes former host node
The related information of mark；
Notification module, sends the abnormal event of the former host node for coordination component and notifies to give each HA group
Part；
Chosen module, has determined that for the HA components of host node be new host node for selected.
10. a kind of HA components of distributed data base system according to claim 6 select main system,
It is characterized in that：Also include：
Second determination module, if not being default host node mark for the mark, judges a HA
Component is from node；
Second removing module, if for from node failure, coordination component to be deleted described corresponding from node
The related information of mark.
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| CN112732674A (en) * | 2021-01-08 | 2021-04-30 | 烽火通信科技股份有限公司 | Cloud platform service management method, device, equipment and readable storage medium |
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