CN106897421B - Memory database read and write abruption system and method based on sentry's mode - Google Patents
Memory database read and write abruption system and method based on sentry's mode Download PDFInfo
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- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
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Abstract
The invention discloses a kind of memory database read and write abruption system and method based on sentry's mode, which includes client, driving unit and data-base cluster；Client accesses data-base cluster by driving unit；Data-base cluster is memory database leader follower replication cluster, includes at least three sentinel nodes, for monitoring master library in real time and living from inventory；Driving unit includes with lower module: updating sentinel node block of state, selection sentinel node module, establishes sentry's link block, judge read-write mode module, selection master library node module, judge read-write requests type block, selection principal and subordinate library node module, update from library information module, establish database connection module.Application program does not need to be respectively configured master library in configuration and from library node, it is only necessary to unified configuration sentinel node, so that it may realize that read-write is automatically separated, can greatly improve handling capacity and high concurrent.Backer's work read and write abruption of the present invention, framework simple and stable, and can realize load balancing.
Description
Technical field
The invention belongs to memory database technical fields, and in particular to write master library to automatic realization and read the method from library.
Background technique
Memory database is currently the common non-relational database of internet industry, especially key assignments type internal storage data
Library, quickly, application scenarios are extensive for read-write requests performance.
Sentry's mode is the middleware that this kind of memory databases are used to monitor and detect master library and failover, Ke Yi
Restore master library in very short time and serviced from library, to improve database availability.Usual situation, all request distributions of client
To master library, concurrent handling capacity is resulted in be subject to certain restrictions in this way, it, can be using read and write abruption in order to improve read-write handling capacity
Method, i.e. write request are distributed on master library, and read request is distributed to from library.
Currently, the common read and write abruption scheme of key assignments memory database generally has the following two kinds:
(1) master library is configured in the application and from library connection type
If it is write operation, master library connection type is used；Otherwise, it using from library connection type, is weighed if client has
Try logic function, can improve to a certain extent from library availability, otherwise, once from library delay machine, read request by whole failures,
Cause very big loss.
Disadvantage:
A) program is that clastotype is write in people's part work and part study, can not adjust automatically principal and subordinate library node；
If b) master library delay machine, can not automatic fault switching, write operation all failure；
C) it cannot achieve load balancing from library；From library, availability is low；
D) client logic is more complicated
(2) middle layer mode is used
Using middle layer mode, it is mounted to different virtual IP address or domain name respectively master library and from library, matches in client
It sets and is respectively configured in file.Read-write requests use corresponding virtual IP address or domain name respectively.
Disadvantage:
A) middle layer itself there are problems that the risk of stability and reliability and, so that reduce entire data-base cluster can
The property used；
B) database schema is more complicated, increases probability of failure；
C) it can not accomplish that read-write is automatically separated；
D) increase maintenance cost.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of memory database reading based on sentry's mode
Write separation system and method.
The purpose of the present invention is achieved through the following technical solutions: a kind of memory database reading based on sentry's mode
Write separation system, including client, three parts of driving unit and data-base cluster；
The client (application program) accesses data-base cluster by driving unit；
The data-base cluster is memory database leader follower replication cluster, can be one main one from it is more to be also possible to a master
From including at least three sentinel nodes, for monitoring master library in real time and living from inventory；
The driving unit includes with lower module:
(1) sentinel node block of state is updated, which receives following parameter: the IP of sentinel node and port；
Illustrate: the IP and port information that failure sentry's list saves the sentinel node that state is failure are (in the list often
A sentry is known as a member)；Survival sentry's list saves the IP and port information (column that state is the sentinel node of survival
Each sentry is known as a member in table).Wherein, if cannot connect to some sentinel node, then it is assumed that the sentry is in event
Barrier state, otherwise it is assumed that being existing state.
The functions of modules is as follows: scanning all members of failure sentry list first, is checked by survival, if the member
Status Change is survival, it is removed in failure sentry's list, while being added in survival sentry's list；Then scanning survival
All members of sentry's list, by survival check, if the member condition is changed to failure, by its from survival list Lee
Removal, is placed in failure sentry's list.Then, it is got and is worked as according to the interface that incoming parameter and sentry itself provide
Preceding all sentinel node information, and judge the viability of each node；If state is failure, and is not had in failure sentry's list
There is sentry's information, be then placed in failure sentry's list, while comparing survival sentry's list, such as there are sentry letters
Breath, then be deleted；If state is survival, and does not have the sentry in sentry's list of surviving, then the survival whistle is placed on
In soldier's list, while failure sentry's list is compared, such as there are the sentry, is then deleted.
(2) sentinel node module is selected, which receives following parameter: the IP of sentinel node and port；
The functions of modules is as follows: selecting a sentinel node in survival sentry's list using random algorithm.If survival
List is empty by sentry, returns an error to client, indicates this time request failure；Otherwise, sentinel node IP and port are returned to.
(3) sentry's link block is established, which receives following parameter: the IP of sentinel node and port；
The functions of modules is as follows: according to incoming parameter, calling system library method is established and is connected with return sentry.
(4) judge read-write mode module, which receives following parameter: sentry's connection and read-write mode；
The functions of modules is as follows: if read-write mode is non-automatic clastotype, calling selection master library node module；
Otherwise, it calls and judges read-write requests type block.
(5) master library node module is selected, which receives following parameter: sentry's connection and master library identifier；
Illustrate: saving master library nodal information, including master library IP, port and master library identifier in master library list；
The functions of modules is as follows: scanning master library list, if there is no the corresponding master library node of the master library identifier, then
Sentry's interface is called, the master library information that corresponding state is survival is reacquired, if obtaining less than master library information, returns to mistake；
Otherwise, it is placed in master library list, meanwhile, return to IP and the port of master library.If having existed master library in master library list
The corresponding master library node of identifier, if the master library state is survival, returns to IP and the end of master library then checking by survival
Mouthful；Otherwise, which is deleted in master library list, calls sentry's interface, reacquire master library information.
(6) judge read-write requests type block, which receives following parameter: sentry's connection and operational order；
Illustrate: all operators of memory database and its read-write type being placed in operator list, wherein write type
Operator, read-write type is to write, and reads the operator of type, and read-write type is to read, remaining operator, and read-write type is
It writes；
The functions of modules is as follows: according to system library function (such as C Plus Plus parsing character string function), operational order is parsed,
Operator is obtained, operator list is then compared, returns to read-write type.
(7) principal and subordinate library node module is selected, which receives following parameter: sentry's connection, read-write type and master library mark
Symbol；
Illustrate: from library, node is placed in the list of library, which includes from library node IP, port and master library identifier；
The functions of modules is as follows: if read-write type is to write type, calling selection master library node module；If it is reading class
Type calls update from library information module first, updates from library nodal information；If from library, list is empty, calls selection master
Library node module；Otherwise, using random algorithm, corresponding one in the list of library, is being randomly choosed from library, is returning to the IP from library
The port and；
(8) it updates from library information module, which receives following parameter: sentry's connection and master library identifier；
The functions of modules is as follows: according to sentry's interface, get the master library identifier it is corresponding it is stateful for survival
From library information, update from library list, at this point, from library list save survival from library node, if do not survive at this time from
Library, then list is empty from library.
(9) database connection module is established, it is as follows which receives parameter: database (master library or from library) node
IP, port and user name password；
The functions of modules is as follows: user name password is first verified that, if user name password bad, then directly returning wrong
Accidentally；Otherwise, calling system library function establishes the connection of client and data-base cluster, carries out read/write operation.
A kind of memory database read and write abruption method based on sentry's mode, client access database by driving unit
Cluster, specifically includes the following steps:
(1) sentry's connection, including following sub-step are obtained:
(1.1) in client configuration file, configure following parameter: the IP address of one or more sentinel node, port,
Master library identifier；User name password and read-write mode；Read-write mode is divided into 0 and 1, and 0 indicates non-automatic read and write abruption, all visitors
The request of family end is all distributed on master library；1 indicate read-write is automatically separated, write request is distributed on master library, read request be distributed to from
On library, if unavailable from library, it is distributed on master library.
(1.2) it client and driving unit interaction: calls update sentinel node block of state first, then, call selection
Sentinel node module selects a sentinel node, finally, call establishment sentry's link block, driving unit establishes sentry's connection,
Return to client.
(2) judge read and write abruption mode: calling judges read-write mode module, according to specific mode, calls selection master library section
Point module judges read-write requests type block, returns to read and write abruption mode type.
(3) select master library or from library node: according to request type, call respectively selection master library node module and update from
Library information module returns to master library or from library node.
(4) establish database connection: the incoming information such as database node IP and port, call establishment database connect mould
As a result block returns to client.
The beneficial effects of the present invention are:
(1) read-write is automatically separated
Application program does not need to be respectively configured master library in configuration and from library node, it is only necessary to unified configuration sentinel node,
It can realize that read-write is automatically separated, handling capacity and high concurrent can be greatly improved.
(2) availability is high
If master library node failure, within a very short time, master library automatically switches and restores service, and substantially increasing master library can
The property used；As long as also, any one sentinel node survival, application program can access memory database node, greatly promote
Service availability.
(3) backer's work read and write abruption
The system not only supports read-write to be automatically separated, can be with backer's work read and write abruption, and can satisfy more scenes needs
It asks, use is more flexible.
(4) framework simple and stable
Master library High Availabitity may be implemented in the system and read-write is automatically separated, and does not need third party software, framework simple and stable.
(5) it uses simply, it is easy to maintain
For application program, it is only necessary to which the unified configuration sentinel node in configuration file does not need other any behaviour
Make, using simple；For operation maintenance personnel, due to not having third party software, framework is simple, and maintenance cost is low.
(6) load balancing
All sentinel nodes (using random algorithm) averraged read-write requests, and load balancing may be implemented；It is multiple from library
(using random algorithm) averraged read request, and load balancing also may be implemented.
Detailed description of the invention
Fig. 1 is the memory database read and write abruption configuration diagram based on sentry's mode；
Fig. 2 is the memory database read and write abruption method flow diagram based on sentry's mode；
Fig. 3 is client write request and driving unit interaction diagrams；
Fig. 4 is client read request and driving unit interaction diagrams.
Specific embodiment
Invention is further described in detail in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, a kind of memory database read and write abruption system based on sentry's mode provided by the invention, including visitor
Family end, three parts of driving unit and data-base cluster；
The client can be application program, access data-base cluster by driving unit；
The data-base cluster is memory database leader follower replication cluster, can be one main one from it is more to be also possible to a master
From including at least three sentinel nodes, for monitoring master library in real time and living from inventory；
The driving unit includes with lower module:
(1) sentinel node block of state is updated, which receives following parameter: the IP of sentinel node and port；
Illustrate: the IP and port information that failure sentry's list saves the sentinel node that state is failure are (in the list often
A sentry is known as a member)；Survival sentry's list saves the IP and port information (column that state is the sentinel node of survival
Each sentry is known as a member in table).Wherein, if cannot connect to some sentinel node, then it is assumed that the sentry is in event
Barrier state, otherwise it is assumed that being existing state.
The functions of modules is as follows: scanning all members of failure sentry list first, is checked by survival, if the member
Status Change is survival, it is removed in failure sentry's list, while being added in survival sentry's list；Then scanning survival
All members of sentry's list, by survival check, if the member condition is changed to failure, by its from survival list Lee
Removal, is placed in failure sentry's list.Then, it is got and is worked as according to the interface that incoming parameter and sentry itself provide
Preceding all sentinel node information, and judge the viability of each node；If state is failure, and is not had in failure sentry's list
There is sentry's information, be then placed in failure sentry's list, while comparing survival sentry's list, such as there are sentry letters
Breath, then be deleted；If state is survival, and does not have the sentry in sentry's list of surviving, then the survival whistle is placed on
In soldier's list, while failure sentry's list is compared, such as there are the sentry, is then deleted.
(2) sentinel node module is selected, which receives following parameter: the IP of sentinel node and port；
The functions of modules is as follows: selecting a sentinel node in survival sentry's list using random algorithm.If survival
List is empty by sentry, returns an error to client, indicates this time request failure；Otherwise, sentinel node IP and port are returned to.
(3) sentry's link block is established, which receives following parameter: the IP of sentinel node and port；
The functions of modules is as follows: according to incoming parameter, calling system library method is established and is connected with return sentry.
(4) judge read-write mode module, which receives following parameter: sentry's connection and read-write mode；
The functions of modules is as follows: if read-write mode is non-automatic clastotype, calling selection master library node module；
Otherwise, it calls and judges read-write requests type block.
(5) master library node module is selected, which receives following parameter: sentry's connection and master library identifier；
Illustrate: saving master library nodal information, including master library IP, port and master library identifier in master library list；
The functions of modules is as follows: scanning master library list, if there is no the corresponding master library node of the master library identifier, then
Sentry's interface is called, the master library information that corresponding state is survival is reacquired, if obtaining less than master library information, returns to mistake；
Otherwise, it is placed in master library list, meanwhile, return to IP and the port of master library.If having existed master library in master library list
The corresponding master library node of identifier, if the master library state is survival, returns to IP and the end of master library then checking by survival
Mouthful；Otherwise, which is deleted in master library list, calls sentry's interface, reacquire master library information.
(6) judge read-write requests type block, which receives following parameter: sentry's connection and operational order；
Illustrate: all operators of memory database and its read-write type being placed in operator list, wherein write type
Operator, read-write type is to write, and reads the operator of type, and read-write type is to read, remaining operator, and read-write type is
It writes；
The functions of modules is as follows: according to system library function (such as C Plus Plus parsing character string function), operational order is parsed,
Operator is obtained, operator list is then compared, returns to read-write type.
(7) principal and subordinate library node module is selected, which receives following parameter: sentry's connection, read-write type and master library mark
Symbol；
Illustrate: from library, node is placed in the list of library, which includes from library node IP, port and master library identifier；
The functions of modules is as follows: if read-write type is to write type, calling selection master library node module；If it is reading class
Type calls update from library information module first, updates from library nodal information；If from library, list is empty, calls selection master
Library node module；Otherwise, using random algorithm, corresponding one in the list of library, is being randomly choosed from library, is returning to the IP from library
The port and；
(8) it updates from library information module, which receives following parameter: sentry's connection and master library identifier；
The functions of modules is as follows: according to sentry's interface, get the master library identifier it is corresponding it is stateful for survival
From library information, update from library list, at this point, from library list save survival from library node, if do not survive at this time from
Library, then list is empty from library.
(9) database connection module is established, it is as follows which receives parameter: database (master library or from library) node
IP, port and user name password；
The functions of modules is as follows: user name password is first verified that, if user name password bad, then directly returning wrong
Accidentally；Otherwise, calling system library function establishes the connection of client and data-base cluster, carries out read/write operation.
As shown in Fig. 2, a kind of memory database read and write abruption method based on sentry's mode provided by the invention, client
Data-base cluster is accessed by driving unit, specifically includes the following steps:
(1) sentry's connection, including following sub-step are obtained:
(1.1) in client configuration file, configure following parameter: the IP address of one or more sentinel node, port,
Master library identifier；User name password and read-write mode；Read-write mode is divided into 0 and 1, and 0 indicates non-automatic read and write abruption, all visitors
The request of family end is all distributed on master library；1 indicate read-write is automatically separated, write request is distributed on master library, read request be distributed to from
On library, if unavailable from library, it is distributed on master library.
(1.2) it client and driving unit interaction: calls update sentinel node block of state first, then, call selection
Sentinel node module selects a sentinel node, finally, call establishment sentry's link block, driving unit establishes sentry's connection,
Return to client.
(2) judge read and write abruption mode: calling judges read-write mode module, according to specific mode, calls selection master library section
Point module judges read-write requests type block, returns to read and write abruption mode type.
(3) select master library or from library node: according to request type, call respectively selection master library node module and update from
Library information module returns to master library or from library node.
(4) establish database connection: the incoming information such as database node IP and port, call establishment database connect mould
As a result block returns to client.
Claims (2)
1. a kind of memory database read and write abruption system based on sentry's mode, which is characterized in that including client, driving unit
With three parts of data-base cluster；
The client accesses data-base cluster by driving unit；
The data-base cluster is memory database leader follower replication cluster, can be one main one from, be also possible to one master and multiple slaves, until
It less include three sentinel nodes, for monitoring master library in real time and living from inventory；
The driving unit includes with lower module:
(1) sentinel node block of state is updated, which receives following parameter: the IP of sentinel node and port；
The functions of modules is as follows: scanning all members of failure sentry list first, is checked by survival, if the member condition
It is changed to survive, it is removed in failure sentry's list, while being added in survival sentry's list；Then scanning survival sentry
All members of list are checked by survival, if the member condition is changed to failure, it is gone in survival list
It removes, is placed in failure sentry's list；Then, it is got currently according to the interface that incoming parameter and sentry itself provide
All sentinel node information, and judge the viability of each node；If state is failure, and is not had in failure sentry's list
Sentry's information is then placed in failure sentry's list, while comparing survival sentry's list, such as there are sentry's information,
Then it is deleted；If state is survival, and does not have the sentry in sentry's list of surviving, then survival sentry's column are placed on
In table, while failure sentry's list is compared, such as there are the sentry, is then deleted；
(2) sentinel node module is selected, which receives following parameter: the IP of sentinel node and port；
The functions of modules is as follows: selecting a sentinel node in survival sentry's list using random algorithm；If surviving sentry
List is empty, returns an error to client, indicates this time request failure；Otherwise, sentinel node IP and port are returned to；
(3) sentry's link block is established, which receives following parameter: the IP of sentinel node and port；
The functions of modules is as follows: according to incoming parameter, calling system library method is established and is connected with return sentry；
(4) judge read-write mode module, which receives following parameter: sentry's connection and read-write mode；
The functions of modules is as follows: if read-write mode is non-automatic clastotype, calling selection master library node module；It is no
Then, it calls and judges read-write requests type block；
(5) master library node module is selected, which receives following parameter: sentry's connection and master library identifier；
The functions of modules is as follows: scanning master library list saves master library nodal information, including master library IP, port in master library list
With master library identifier；If there is no the corresponding master library node of the master library identifier, then sentry's interface is called, reacquisition pair
The state answered is the master library information of survival, if obtaining less than master library information, returns to mistake；Otherwise, it is placed on master library list
In, meanwhile, return to IP and the port of master library；If having existed the corresponding master library node of master library identifier in master library list, that
It is checked by survival, if the master library state is survival, returns to IP and the port of master library；Otherwise, which is arranged from master library
It is deleted in table, calls sentry's interface, reacquire master library information；
(6) judge read-write requests type block, which receives following parameter: sentry's connection and operational order；
The functions of modules is as follows: all operators of memory database and its read-write type are placed in operator list, wherein
The operator of type is write, read-write type is to write, and reads the operator of type, and read-write type is to read, remaining operator reads and writes class
Type is to write；According to system library function, operational order is parsed, obtains operator, then compares operator list, returns to read-write class
Type；
(7) principal and subordinate library node module is selected, which receives following parameter: sentry's connection, read-write type and master library identifier；
The functions of modules is as follows: from library, node is placed in the list of library, which includes from library node IP, port and master library mark
Know symbol；If read-write type is to write type, selection master library node module is called；If it is read type, first call update from
Library information module is updated from library nodal information；If from library, list is empty, calls selection master library node module；Otherwise, it adopts
With random algorithm, corresponding one in the list of library, is being randomly choosed from library, is returning to the IP from library and port；
(8) it updates from library information module, which receives following parameter: sentry's connection and master library identifier；
The functions of modules is as follows: according to sentry's interface, get the master library identifier it is corresponding it is stateful be survival from library
Information is updated from library list, at this point, from library list save survival from library node, if do not survive at this time from library, that
From library, list is empty；
(9) database connection module is established, it is as follows which receives parameter: master library or the IP from library node, port and user
Name password；
The functions of modules is as follows: user name password is first verified that, if user name password bad, then directly returning to mistake；It is no
Then, calling system library function establishes the connection of client and data-base cluster, carries out read/write operation.
2. a kind of method of the memory database read and write abruption system of sentry's mode based on claim 1, which is characterized in that tool
Body the following steps are included:
(1) sentry's connection, including following sub-step are obtained:
(1.1) in client configuration file, following parameter: the IP address of one or more sentinel node, port, master library is configured
Identifier；User name password and read-write mode；
(1.2) it client and driving unit interaction: calls update sentinel node block of state first, then, call selection sentry
Node module selects a sentinel node, finally, call establishment sentry's link block, driving unit establishes sentry's connection, returns
To client；
(2) judge read and write abruption mode: calling judges read-write mode module, according to specific mode, calls selection master library node mould
Block judges read-write requests type block, returns to read and write abruption mode type；
(3) it selects master library or from library node: according to request type, calling selection master library node module respectively and update and believe from library
Module is ceased, returns to master library or from library node；
(4) database connection is established: incoming database node IP and port information, call establishment database connection module, as a result
Return to client.
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