CN112860668B - Method for realizing Store disabling and enabling functions - Google Patents
Method for realizing Store disabling and enabling functions Download PDFInfo
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- CN112860668B CN112860668B CN202110199658.XA CN202110199658A CN112860668B CN 112860668 B CN112860668 B CN 112860668B CN 202110199658 A CN202110199658 A CN 202110199658A CN 112860668 B CN112860668 B CN 112860668B
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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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- G06F16/27—Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system architectures therefor
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Abstract
The invention discloses a method for realizing a Store disabling and enabling function, and relates to the technical field of distributed database load management; and adding an attribute state to the Store to represent the state of the Store, carrying out state assignment on the Store, filtering out the Store with the state value DISABLE, only leaving the Store with the state value DISABLE to carry out the rebalancing of the cluster, and modifying the Store with the state value DISABLE into the Store with the state value ENABLE to ENABLE the Store with the state value DISABLE to participate in the rebalancing so as to realize the switching of Store disabling and enabling.
Description
Technical Field
The invention discloses a method, relates to the technical field of distributed database load management, and particularly relates to a method for realizing a Store disabling and enabling function.
Background
In the existing distributed database, when a store is newly added into a cluster, the cluster is easy to generate a state of unbalanced load due to the fact that the new store with lower load is detected to enter the cluster, and the cluster performs rebalance of the store at the moment, so that a new load balancing state is achieved.
Therefore, when a disk replacement operation is completed in a normal running cluster, the cluster needs to be paused or stopped to replace a new disk after a node in the disk to be replaced completes a normal offline process, and during this period, the cluster cannot normally provide services to the outside, so that the development of a corresponding distributed database is very limited.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method for realizing the memory disabling and enabling functions, which completes the design of the memory disabling and enabling functions by controlling the rebaance of the memory, can be applied to the scenes such as disk replacement and the like which need to be manually controlled, and completes the disk replacement operation in the normal running process of the cluster, thereby improving the availability of the database.
The specific scheme provided by the invention is as follows:
a method for realizing a Store disable and enable function, which aims at the state of a Store represented by a Store added attribute state, carries out state assignment on the Store,
filtering out the store with the state value of DISABLE, only leaving the store with the state value of ENABLE to carry out the rebaance of the cluster,
and (3) modifying the Store with the state value DISABLE into the Store with the state value ENABLE, so that the Store with the original state value DISABLE participates in the rebaance, and switching between Store disabling and enabling is realized.
Further, in the method for implementing the Store disable and enable function, the state assignment of the Store is performed:
analyzing the cmd command, judging whether the command for the state in the command meets the requirement,
if so, the state value in the cmd command is assigned to the state of the store,
otherwise, returning.
Further, in the method for realizing the Store disable and enable function, the state assignment of the Store is modified:
judging whether the state value of the store can be obtained, and if the state value of the store is DISABLE, changing the state value of the store into ENABLE by utilizing an update command.
A system for realizing Store disable and enable functions comprises an adding module, an assignment module, a filtering module and a switching module,
the adding module adds attribute state for the store to represent the state of the store, the assigning module assigns state to the store,
the filtering module filters out the store with the state value of DISABLE, only leaves the store with the state value of ENABLE to carry out the rebaance of the cluster,
the switching module changes the Store with the state value DISABLE into the Store with the state value ENABLE, so that the Store with the original state value DISABLE participates in the rebaance, and the switching of the Store disabling and enabling is realized.
Further, the assignment module in the Store disable and enable function implementation system performs Store state assignment:
analyzing the cmd command, judging whether the command for the state in the command meets the requirement,
if so, the state value in the cmd command is assigned to the state of the store,
otherwise, returning.
Further, the switching module in the Store disable and enable function implementation system modifies the state assignment of the Store:
judging whether the state value of the store can be obtained, and if the state value of the store is DISABLE, changing the state value of the store into ENABLE by utilizing an update command.
An implementation apparatus for a Store disable and enable function, comprising: at least one memory and at least one processor;
the at least one memory for storing a machine readable program;
the at least one processor is configured to invoke the machine-readable program and execute the method for implementing the Store disable and enable function.
A computer readable medium having stored thereon computer instructions which, when executed by a processor, cause the processor to perform the method of implementing a Store disable and enable function.
The invention has the advantages that:
the invention provides a method for realizing a Store disabling and enabling function, which aims at the state of a Store, wherein an attribute state is added to the Store to represent the state of the Store, the Store with a state value of DISABLE is filtered, and only the Store with a state value of ENABLE is left to carry out the rebaance of a cluster, namely, the method is used for processing the scenes of replacing a disk and the like, which need to manually control the rebaance of the Store, so that the cluster can replace the disk under the condition of normal operation, and the cluster does not need to be suspended or stopped, thereby greatly increasing the availability of a database.
Meanwhile, the Store with the state value DISABLE can be modified into the Store with the state value ENABLE, so that the Store with the original state value DISABLE participates in the rebaance, the switching of Store disabling and enabling is realized, and the flexibility of use of the Store in the cluster is improved.
Drawings
FIG. 1 is a schematic diagram of a state assignment flow for a store of the method of the present invention;
FIG. 2 is a schematic diagram of a state value status determination process in the method of the present invention;
FIG. 3 is a schematic flow diagram of a prior art rebaance;
FIG. 4 is a schematic flow chart of rebaLance in the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.
The invention provides a method for realizing Store disable and enable functions, which aims at the state of a Store represented by adding attribute state to the Store, carries out state assignment to the Store,
filtering out the store with the state value of DISABLE, only leaving the store with the state value of ENABLE to carry out the rebaance of the cluster,
and (3) modifying the Store with the state value DISABLE into the Store with the state value ENABLE, so that the Store with the original state value DISABLE participates in the rebaance, and switching between Store disabling and enabling is realized. The method of the invention can be used for completing the forbidden and enabled function design of the store by controlling the rebaance of the store, and can be finally applied to the scenes needing to manually control the rebaance, such as disk replacement, etc.
In particular applications, the method of the present invention is utilized in a distributed database, such as Langchao cloud stream database ZNBase, where in some embodiments, the disabling and enabling of the Store is primarily for rebaance. In the prior art, the policy of rebaance selects a suitable store from the stores of the current cluster according to the survival condition of the store to form a list, and then selects a target from the list according to the load condition of the store. In the method of the invention, a state is added in the state of the store, the value is DISABLE or ENABLE, the store with the state of ENABLE is defined as the store which needs to participate in the rebaance, the other stores are defined as the store which does not participate in the rebaance, the store which participates in the rebaance is selected from the store to form a list, the state=DISABLE is filtered, and only the store with the state=ENABLE is left for rebaance, so that the store except for ENABLE does not participate in the rebaance. If the store with the state value DISABLE is needed to participate in the rebaance, the state value can be modified to ENABLE by utilizing an update command, namely, the store with the state value DISABLE is added into the list of the uncompensation, and the store is logically processed according to the store of the uncompensation, so that the transfer of the duplicate on the store can be completed, and then the rebaance is carried out.
In other embodiments of the method of the present invention, a Store's assignment process is exemplified, wherein the metadata. Pro file may be modified prior to assignment such that a new state is added to the Store descriptor, either with a DISABLE or ENABLE value, and then the state is added to the method of initializing the Store, the RocksDBConfig is modified, and the state is added, and each time a Store is initialized, the state of the Store is initialized. To be able to obtain the state of the store, the state may be added to the system table bidb_internal. Kv_store_state, and querying this system table can obtain the state parameters of the store. Referring to FIG. 1, a state command is added to a cmd command, a state value is obtained by parsing the cmd command, and then the command is transferred to a storage layer to complete state assignment. The process is as follows:
analyzing the cmd command, judging whether the cmd command meets the requirement, if so, judging whether the command for the state in the command meets the requirement,
if yes, the state value in the cmd command is assigned to the state of the store, otherwise, the method returns.
The method can rapidly and timely process the scene of the rebaance needing to manually control the store, such as changing the disk, and the like, and the cluster can be changed under the condition of normal operation without suspending or stopping the cluster, so that the availability of the database can be greatly increased.
The invention also provides a system for realizing the Store disable and enable function, which comprises an adding module, an assignment module, a filtering module and a switching module,
the adding module adds attribute state for the store to represent the state of the store, the assigning module assigns state to the store,
the filtering module filters out the store with the state value of DISABLE, only leaves the store with the state value of ENABLE to carry out the rebaance of the cluster,
the switching module changes the Store with the state value DISABLE into the Store with the state value ENABLE, so that the Store with the original state value DISABLE participates in the rebaance, and the switching of the Store disabling and enabling is realized. The content of information interaction and execution process between the modules in the system is based on the same concept as the method embodiment of the present invention, and specific content can be referred to the description in the method embodiment of the present invention, which is not repeated here.
The invention provides a device for realizing Store disabling and enabling functions, which comprises: at least one memory and at least one processor;
the at least one memory for storing a machine readable program;
the at least one processor is configured to invoke the machine-readable program and execute the method for implementing the Store disable and enable function. The content of the information interaction and the readable program process of the processor in the device is based on the same concept as the embodiment of the method of the present invention, and the specific content can be referred to the description in the embodiment of the method of the present invention, which is not repeated here.
The invention also provides a computer readable medium, wherein the computer readable medium stores computer instructions, and the computer instructions, when executed by a processor, cause the processor to execute the method for realizing the Store disabling and enabling functions. Specifically, a system or apparatus provided with a storage medium on which a software program code realizing the functions of any of the above embodiments is stored, and a computer (or CPU or MPU) of the system or apparatus may be caused to read out and execute the program code stored in the storage medium.
In this case, the program code itself read from the storage medium may realize the functions of any of the above-described embodiments, and thus the program code and the storage medium storing the program code form part of the present invention.
Examples of the storage medium for providing the program code include a floppy disk, a hard disk, a magneto-optical disk, an optical disk (e.g., CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW), a magnetic tape, a nonvolatile memory card, and a ROM. Alternatively, the program code may be downloaded from a server computer by a communication network.
Further, it should be apparent that the functions of any of the above-described embodiments may be implemented not only by executing the program code read out by the computer, but also by causing an operating system or the like operating on the computer to perform part or all of the actual operations based on the instructions of the program code.
Further, it is understood that the program code read out by the storage medium is written into a memory provided in an expansion board inserted into a computer or into a memory provided in an expansion unit connected to the computer, and then a CPU or the like mounted on the expansion board or the expansion unit is caused to perform part and all of actual operations based on instructions of the program code, thereby realizing the functions of any of the above embodiments.
It should be noted that, in the above preferred embodiments, not all steps and modules in each flow and each system structure are necessary, and some steps or modules may be omitted according to actual needs. The execution sequence of the steps is not fixed and can be adjusted as required. The system structure described in the above embodiments may be a physical structure or a logical structure, that is, some modules may be implemented by the same physical entity, or some modules may be implemented by multiple physical entities, or may be implemented jointly by some components in multiple independent devices.
The above-described embodiments are merely preferred embodiments for fully explaining the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present invention, and are intended to be within the scope of the present invention. The protection scope of the invention is subject to the claims.
Claims (4)
1. A method for realizing a Store disabling and enabling function is characterized in that attribute state is added to a Store to represent the state of the Store, the Store is assigned with state, and the Store is assigned with state: analyzing the cmd command, judging whether the command aiming at the state meets the requirement or not, if so, assigning the state value in the cmd command to the state of the store, otherwise, returning;
filtering out the store with the state value of DISABLE, and only leaving the store with the state value of ENABLE to carry out the rebaance of the cluster;
by modifying the store with the state value DISABLE to the store with the state value ENABLE, the store with the original state value DISABLE participates in the rebaance, and the state assignment of the store is modified: judging whether the state value of the store can be obtained, and if the state value of the store is DISABLE, changing the state value of the store into ENABLE by utilizing an update command;
switching between Store disable and enable is achieved.
2. A system for realizing Store disable and enable functions is characterized by comprising an adding module, an assignment module, a filtering module and a switching module,
the adding module is used for adding attribute states to the store to represent the states of the store, the assigning module is used for assigning states of the store, and the assigning module is used for assigning states of the store: analyzing the cmd command, judging whether the command aiming at the state meets the requirement or not, if so, assigning the state value in the cmd command to the state of the store, otherwise, returning;
the filtering module filters out the store with the state value of DISABLE, and only leaves the store with the state value of ENABLE to carry out the rebaance of the cluster;
the switching module changes the store with the state value of DISABLE into the store with the state value of ENABLE, so that the store with the original state value of DISABLE participates in the rebaance, and the state assignment of the store is modified: judging whether the state value of the Store can be obtained, if so, changing the state value of the Store into ENABLE by utilizing an update command to realize switching between Store disabling and enabling.
3. A Store disable and enable feature implementation apparatus, comprising: at least one memory and at least one processor;
the at least one memory for storing a machine readable program;
the at least one processor configured to invoke the machine-readable program to perform a Store disable and enable feature implementation method of claim 1.
4. A computer readable medium having stored thereon computer instructions which, when executed by a processor, cause the processor to perform a method of implementing a Store disable and enable function as claimed in claim 1.
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