CN105630850B - Method and system for verifying data of distributed database in real time - Google Patents
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Abstract
The invention relates to the field of communication, and discloses a method and a system for verifying data of a distributed database in real time. In the invention, the data of the distributed database is distributed in N data nodes, and the method comprises the following steps: after the distributed database is operated, if the operation causes the data in the N data nodes to change, the database incremental copying platform acquires the changed data and synchronizes the changed data to a verification database independent of the N data nodes; and inquiring the verification database, and verifying whether the operation on the distributed database obtains a correct result. In the invention, a verification database is added, the update data in the distributed database is synchronized into the verification database by using the distributed database incremental replication platform, and when the number of data nodes changes or the algorithm of the data distributed in different data nodes is adjusted, the verification logic cannot be influenced, and the environment on the line cannot be damaged.
Description
Technical Field
The invention relates to the field of communication, in particular to a distributed database data verification technology.
Background
With the development of cloud computing, distributed database systems are more and more popular in application. In the application scenario of the distributed database, how to verify the data correctness of the distributed database system, especially a system providing services, has important practical significance.
A common implementation is such that:
in the distributed database, the records of the same logical table are distributed in a plurality of data nodes by hash distribution according to the primary key. When it is necessary to verify the data correctness of a distributed database system, there are generally two schemes:
1. and inquiring the database nodes one by one, summarizing the database nodes, and finally forming summarized data of the logic table so as to finish the data verification work.
2. The database is inquired through an interface of a distributed database system which is the same as that of the application, so that whether various data operations of the application on the database obtain correct results or not is verified.
Specifically, the following scenarios are envisaged: a logic TABLE TABLE1 is distributed among 10 data NODEs according to the primary key hash, NODE1 and NODE2 … … NODE 10. There is now a need to verify that the distributed database system has correctly processed the various update and insert requests of the application.
The first conventional scheme is as follows:
when it is necessary to verify whether the data of the TABLE1 is complete among 10 data nodes, the user needs two pieces of information, the first is which data nodes are in total, and the second is what hash algorithm is used. And then, the user traverses the data nodes one by one according to the distribution of the main keys, summarizes the data nodes, finally merges a logic table, and verifies whether the data nodes are consistent with the data expected by the user in the logic table.
The first scheme has the following problems:
1. if the number of the data nodes is changed from 10 to 1000, the verification work is increased along with the increase of the number of the data nodes of the distributed database, and the complexity is correspondingly increased;
2. if the data nodes are simultaneously providing service on the line, the verification work is harmful to the environment on the line;
3. when the distribution rule (hash algorithm) of the primary key in the database changes, the verification work also needs to be changed accordingly.
The traditional scheme two:
and the verification program queries the distributed database system through the same interface as the application, and confirms whether the result obtained by querying is consistent with the expectation or not, so that the correctness of the data is verified.
The second scheme has the following problems:
1. using the same interface as the application can affect the performance of the distributed database system, and validation work is also detrimental to the online environment.
2. The application and the verification use the same interface, and the distributed database does not support a specific verification mode and does not have enough verification on correctness.
Disclosure of Invention
The invention aims to provide a method and a system for verifying data of a distributed database in real time, which can not influence the verification logic and damage the environment on the line when the number of data nodes changes or the algorithm for distributing the data in different data nodes is adjusted.
In order to solve the above technical problem, an embodiment of the present invention discloses a method for verifying data of a distributed database in real time, where the data of the distributed database is distributed in N data nodes, and the method includes the following steps:
after the distributed database is operated, if the operation causes the data of at least one data node in the N data nodes to change, the database incremental copying platform acquires the changed data in each data node;
the database incremental replication platform synchronizes the acquired changed data to a verification database independent of the N data nodes;
and inquiring the verification database, and verifying whether the operation on the distributed database obtains a correct result.
The embodiment of the invention also discloses a system for verifying the data of the distributed database in real time, wherein the data of the distributed database is distributed in N data nodes, and the system comprises the distributed database, a distributed database increment replication platform, a verification database and a verification module;
after the distributed database is operated, if the operation causes the data of at least one data node in the N data nodes to change, the database incremental copying platform acquires the changed data in each data node;
the database incremental replication platform synchronizes the acquired changed data to a verification database independent of the N data nodes;
the verification module is used for inquiring the verification database and verifying whether the operation on the distributed database obtains a correct result.
Compared with the prior art, the implementation mode of the invention has the main differences and the effects that:
the invention adds a verification database, synchronizes the updated data in the distributed database to the verification database by using the incremental replication platform of the distributed database, and when the number of data nodes changes or the hash algorithm of the data distributed in different data nodes is adjusted, the logic of verification is not influenced, and the environment on the line is not damaged.
Furthermore, in the embodiment, the verified data in the verification database is deleted in time, so that the total amount of the data in the verification database is less, and the verification efficiency is improved.
Further, the distributed database and the verification database are located in different physical servers, and when the verification database is verified, even if the distributed database is providing services, the computing resources of the system where the distributed database is located are not occupied.
Further, in various embodiments of the present invention, the verification database is queried for verification using aggregation class functions and/or ranking class functions that are not supported by the distributed database, so that the verification of the data of the distributed database can be made sufficient.
Drawings
FIG. 1 is a flow chart illustrating a method for real-time verification of data in a distributed database according to a first embodiment of the present invention;
FIG. 2 is an overall architecture diagram of a method for real-time verification of data in a distributed database according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a system for performing real-time verification on data of a distributed database according to a fourth embodiment of the present invention.
Detailed Description
In the following description, numerous technical details are set forth in order to provide a better understanding of the present application. However, it will be understood by those skilled in the art that the technical solutions claimed in the present application can be implemented without these technical details and with various changes and modifications based on the following embodiments.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The first embodiment of the present invention relates to a method for verifying data of a distributed database in real time, and fig. 1 is a flowchart illustrating the method for verifying data of a distributed database in real time.
Specifically, the data of the distributed database is distributed in N data nodes, as shown in fig. 1, the method includes the following steps:
in step 101, after the operation is performed on the distributed database, if the operation changes data of at least one data node of the N data nodes, the database incremental replication platform acquires the changed data in each data node.
The operations performed on the distributed database include various deletions, updates, and insertions, or other operations performed through the distributed database access portal.
Thereafter, step 102 is entered, and the database incremental replication platform synchronizes the obtained changed data to the verification database independent of the N data nodes.
The flow ends thereafter.
It is to be appreciated that the distributed database incremental replication platform is primarily intended for synchronization purposes. The invention adds a verification database, and synchronizes the changed data in the distributed database to the verification database by using the incremental replication platform of the distributed database, thereby verifying the data in the distributed database. Even if the number of the data nodes changes or the hash algorithm of data distributed in different data nodes is adjusted, the verification logic cannot be influenced, and the environment on the line cannot be damaged.
The second embodiment of the invention relates to a method for verifying data of a distributed database in real time, and is improved on the basis of the first embodiment.
Specifically, before step 101, the method further comprises the steps of:
and deploying a distributed database incremental replication platform.
The step of deploying the distributed database incremental replication platform comprises the following substeps:
designating a synchronous data source of the incremental replication platform of the distributed database as each data node of the distributed database;
designating a synchronous target database of a distributed database incremental replication platform as a verification database;
and starting the synchronous function of the incremental replication platform of the distributed database.
In another preferred example, the distributed database and the verification database are located in different physical servers, and the data of the distributed database is distributed in the N data nodes according to the primary key hash.
The distributed database and the verification database are located in different physical servers, so that when the verification database is verified, even if the distributed database is providing services, the computing resources of the system where the distributed database is located are not occupied
In other embodiments of the present invention, the distributed database and the verification database are not necessarily located in different physical servers, and may be located in the same group of servers. In addition, the data of the distributed database is not necessarily distributed according to the primary key hash.
As a preferred example of this embodiment, the solution will be further described with reference to fig. 2. Fig. 2 is an overall architecture diagram of a method for performing real-time verification on data of a distributed database.
The application scenarios to be solved by the preferred embodiment are as follows:
the user has a logical TABLE TABLE1, and writes several records to TABLE1 through the access portal of the distributed database, and the records are distributed among 4 data NODEs according to the specific primary key hash algorithm, namely NODE1, NODE2, NODE3 and NODE 4. Now, a user needs to verify whether a plurality of records written by the user through the access entrance of the distributed database are completely and accurately written into the distributed database system.
As shown in fig. 2, the solution of the preferred embodiment is as follows:
1. firstly, a distributed incremental replication platform is deployed, a synchronization data source of the distributed incremental replication platform is assigned to each NODE, a synchronization destination DataBase is assigned to a DataBase2 (namely, a verification DataBase), and synchronization service is started;
2. a user operates a plurality of records through a distributed database access entry;
3. the user updates the data while the update is synchronized to Database 2;
4. the verification program can verify the correctness of the data in real time through querying Database 2.
In this application scenario, the logic of the verification program need not be adjusted to meet the need when the following changes occur: the data node changes; and adjusting the hash algorithm of data distributed in different nodes.
The third embodiment of the present invention relates to a method for verifying data of a distributed database in real time, and is an improvement on the first embodiment, and the main improvements are as follows: in the embodiment, the verified data in the verification database is deleted in time, so that the total amount of the data in the verification database is less, and the verification efficiency is improved; querying the verification database for verification by using the aggregation class function and/or the sorting class function which are not supported by the distributed database can ensure that the verification of the data of the distributed database is sufficient.
Specifically, after step 103, the method further comprises the steps of:
deleting the verified data in the verification database.
It is understood that, in the embodiments of the present invention, the deletion operation may be performed on the verified data in the verification database at certain time intervals, or whether the deletion operation is performed may be determined by determining whether the verified data amount in the verification database reaches a threshold.
In addition, it can be understood that the total amount of data in the verification database can be ensured to be less by deleting the verified data in the verification database in time, and the verification efficiency is improved.
In the present invention, the step of deleting the data that has been verified in the verification database is not essential, and in other embodiments of the present invention, this step may not be present.
In addition, it is considered that if the distributed database is verified directly, since the same interface is used for the operation and verification of the database, the verification of the correctness is not sufficient. Due to the distributed structure of the distributed database, the provided verification mode is limited, for example, after the data operated by the aggregation function is distributed to each data node of the distributed database, the verification cannot be performed by using the aggregation function, and if the data operated by the sorting function is distributed to each data node of the distributed database, the verification cannot be performed by using the sorting function to determine whether the sorting is correct.
In view of the above problem, step 103 preferably further comprises the following sub-steps:
in the verification database, the aggregation class function and/or the sequencing class function which are not supported by the distributed database are used for inquiring the verification database to verify the correctness of the operation.
In various embodiments of the present invention, the verification database is queried for verification using aggregation class functions and/or ranking class functions that are not supported by the distributed database, so that the verification of the data of the distributed database can be sufficiently sufficient.
In addition, it is understood that in other embodiments of the present invention, the verification database does not necessarily need to query the verification database for verification using the aggregation class function and/or the sorting class function that are not supported by the distributed database, and other verification methods, such as directly querying in the verification database using the Select statement or querying in the verification database using the functions supported by the distributed database, may also be used.
The method embodiments of the present invention may be implemented in software, hardware, firmware, etc. Whether the present invention is implemented as software, hardware, or firmware, the instruction code may be stored in any type of computer-accessible memory (e.g., permanent or modifiable, volatile or non-volatile, solid or non-solid, fixed or removable media, etc.). Also, the Memory may be, for example, Programmable Array Logic (PAL), Random Access Memory (RAM), Programmable Read Only Memory (PROM), Read-Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), a magnetic disk, an optical disk, a Digital Versatile Disk (DVD), or the like.
A fourth embodiment of the present invention relates to a system for verifying data of a distributed database in real time, and fig. 3 is a schematic structural diagram of the system for verifying data of a distributed database in real time.
Specifically, the data of the distributed database is distributed among N data nodes, and as shown in fig. 3, the system includes a distributed database, a distributed database incremental replication platform, a validation database, and a validation module.
After the distributed database is operated, if the operation causes the data of at least one data node in the N data nodes to change, the database incremental copy platform acquires the changed data in each data node.
The operations performed on the distributed database include various deletion, update and insertion operations performed through the access portal of the distributed database, or other operations.
And the database incremental replication platform synchronizes the acquired changed data to a verification database independent of the N data nodes.
The verification module is used for inquiring the verification database and verifying whether the operation on the distributed database obtains a correct result.
It is to be appreciated that the distributed database incremental replication platform is primarily intended for synchronization purposes. The invention adds a verification database, and synchronizes the changed data in the distributed database to the verification database by using the incremental replication platform of the distributed database, thereby verifying the data in the distributed database. Even if the number of the data nodes changes or the hash algorithm of data distributed in different data nodes is adjusted, the verification logic cannot be influenced, and the environment on the line cannot be damaged.
The first embodiment is a method embodiment corresponding to the present embodiment, and the present embodiment can be implemented in cooperation with the first embodiment. The related technical details mentioned in the first embodiment are still valid in this embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related-art details mentioned in the present embodiment can also be applied to the first embodiment.
The fifth embodiment of the present invention relates to a system for real-time verification of data in a distributed database, and is an improvement of the fourth embodiment, and the main improvements are that: the distributed database and the verification database are located in two independent servers, so that when the verification database is verified, even if the distributed database provides services, the computing resources of the system where the distributed database is located are not occupied.
Specifically, in a preferred embodiment, the method further comprises:
and the increment replication platform deployment module is used for deploying the distributed database increment replication platform.
The incremental replication platform deployment module comprises the following sub-modules:
the synchronous data source designating submodule is used for designating a synchronous data source of the incremental replication platform of the distributed database as each data node of the distributed database;
the synchronous target database appointing submodule is used for appointing a synchronous target database of the distributed database incremental replication platform as a verification database;
and the synchronous starting submodule is used for starting the synchronous function of the distributed database incremental replication platform.
In another preferred example, the distributed database and the verification database are located in different physical servers, and the data of the distributed database is distributed in the N data nodes according to the primary key hash.
The distributed database and the verification database are located in two independent servers, and when the verification database is verified, even if the distributed database provides services, the distributed database does not occupy the computing resources of the system where the distributed database is located.
Furthermore, it is to be understood that in other embodiments of the present invention, the distributed database and the verification database are not necessarily located in different physical servers, but may be located in the same group of servers. In addition, the data of the distributed database is not necessarily distributed according to the primary key hash.
The second embodiment is a method embodiment corresponding to the present embodiment, and the present embodiment can be implemented in cooperation with the second embodiment. The related technical details mentioned in the second embodiment are still valid in this embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related-art details mentioned in the present embodiment can also be applied to the second embodiment.
The sixth embodiment of the present invention relates to a system for real-time verification of data in a distributed database, and is an improvement on the fourth embodiment, and the main improvements are that: in the embodiment, the verified data in the verification database is deleted in time, so that the total amount of the data in the verification database is less, and the verification efficiency is improved; querying the verification database for verification by using the aggregation class function and/or the sorting class function which are not supported by the distributed database can ensure that the verification of the data of the distributed database is sufficient.
Specifically, in a preferred embodiment, the verification database further comprises a deletion module for deleting the verified data in the verification database.
Furthermore, it is understood that, in the embodiments of the present invention, the deletion operation may be performed on the data in the verification database at regular time intervals, or may be determined by determining whether the amount of data in the verification database reaches a threshold.
In the embodiment, the verified data in the verification database is deleted in time, so that the total amount of the data in the verification database is less, and the verification efficiency is improved.
In the present invention, a deletion module for deleting data that has been verified in the verification database is not necessary, and in other embodiments of the present invention, the module may not be present.
In addition, it is considered that if the distributed database is verified directly, since the same interface is used for the operation and verification of the database, the verification of the correctness is not sufficient. Due to the distributed structure of the distributed database, the provided verification mode is limited, for example, after the data operated by the aggregation function is distributed to each data node of the distributed database, the verification cannot be performed by using the aggregation function, and if the data operated by the sorting function is distributed to each data node of the distributed database, the verification cannot be performed by using the sorting function to determine whether the sorting is correct.
In view of the above problem, preferably, the verification module performs verification by:
in the verification database, the aggregation class function and/or the sequencing class function which are not supported by the distributed database are used for inquiring the verification database to verify the correctness of the operation.
In various embodiments of the present invention, the verification database is queried for verification using aggregation class functions and/or ranking class functions that are not supported by the distributed database, so that the verification of the data of the distributed database can be sufficiently sufficient.
In other embodiments of the present invention, the validation database does not necessarily use the aggregation function and/or the sorting function that are not supported by the distributed database to query the validation database for validation, and other validation methods, such as directly using the Select statement to query the validation database, or using the functions supported by the distributed database to query the validation database, may also be used.
The third embodiment is a method embodiment corresponding to the present embodiment, and the present embodiment can be implemented in cooperation with the third embodiment. The related technical details mentioned in the third embodiment are still valid in this embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related-art details mentioned in the present embodiment can also be applied to the third embodiment.
The invention provides a method and a system for verifying data of a distributed database in real time, which can be constructed quickly, are simple to implement and have no influence on normal online service, and are used for solving the problem of data verification of a distributed database system.
Aiming at various defects in the prior art, the effects that can be realized are as follows:
1. the method is not influenced by the change of the data nodes;
2. no damage is caused to the online environment;
3. the method is not influenced by the change of a data distribution rule (hash algorithm);
4. the verification is sufficient.
It should be noted that, in each device embodiment of the present invention, each module is a logic module, and physically, one logic module may be one physical module, or may be a part of one physical module, or may be implemented by a combination of multiple physical modules, and the physical implementation manner of the logic modules itself is not the most important, and the combination of the functions implemented by the logic modules is the key to solve the technical problem provided by the present invention. Furthermore, in order to highlight the innovative part of the present invention, the above-mentioned embodiments of the device of the present invention do not introduce modules which are not so closely related to solve the technical problems proposed by the present invention, which does not indicate that there are no other modules in the above-mentioned embodiments of the device.
It is to be noted that in the claims and the description of the present patent, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the use of the verb "comprise a" to define an element does not exclude the presence of another, same element in a process, method, article, or apparatus that comprises the element.
While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A method for real-time verification of data in a distributed database, wherein the data in the distributed database is distributed among a plurality of data nodes, the method comprising the steps of:
after the distributed database is operated, if the operation causes the data of at least one data node in the plurality of data nodes to change, the incremental replication platform of the database acquires the changed data in each data node;
the database incremental replication platform synchronizes the acquired changed data to a verification database independent of the plurality of data nodes;
and inquiring the verification database, and verifying whether the operation performed on the distributed database obtains a correct result.
2. The method for real-time verification of data in a distributed database according to claim 1, wherein before the step of "after the operation is performed on the distributed database, if the operation causes data in at least one of the plurality of data nodes to change, the database incremental replication platform obtains the changed data in each data node", the method further comprises the following steps:
deploying a distributed database increment replication platform;
the step of deploying a distributed database incremental replication platform comprises the sub-steps of:
appointing a synchronous data source of the incremental replication platform of the distributed database as each data node of the distributed database;
designating a synchronous destination database of the distributed database incremental replication platform as the verification database;
and starting the synchronous function of the incremental copy platform of the distributed database.
3. The method of claim 1, wherein after the step of querying the verification database to verify whether the data operation performed on the distributed database has a correct result, the method further comprises the steps of:
deleting the verified data in the verification database.
4. The method of claim 1, wherein the data of the distributed database is distributed among a plurality of data nodes according to a primary key hash, and the distributed database and the verification database are located in different physical servers.
5. Method for real-time verification of data of a distributed database according to any of claims 1 to 4, wherein said step of "querying said verification database, verifying whether the operation performed on said distributed database has obtained a correct result" comprises the sub-steps of:
and in the verification database, querying the verification database by using an aggregation class function and/or a sorting class function which are not supported by the distributed database so as to verify the correctness of the operation.
6. A system for verifying data of a distributed database in real time is characterized in that the data of the distributed database is distributed in a plurality of data nodes and comprises the distributed database, a distributed database incremental replication platform, a verification database and a verification module;
after the distributed database is operated, if the operation causes the data of at least one data node in the plurality of data nodes to change, the database incremental replication platform acquires the changed data in each data node;
the database incremental replication platform synchronizing the acquired changed data to a validation database independent of the plurality of data nodes;
the verification module is used for inquiring the verification database and verifying whether the operation on the distributed database obtains a correct result.
7. The system for real-time validation of data in a distributed database according to claim 6, further comprising:
the incremental replication platform deployment module is used for deploying the incremental replication platform of the distributed database;
the incremental replication platform deployment module comprises the following sub-modules:
the synchronous data source designating submodule is used for designating the synchronous data source of the incremental replication platform of the distributed database as each data node of the distributed database;
a synchronization target database designating submodule, configured to designate a synchronization target database of the distributed database incremental replication platform as the verification database;
and the synchronous starting submodule is used for starting the synchronous function of the distributed database incremental replication platform.
8. The system for real-time validation of data in a distributed database according to claim 6, wherein said validation database further comprises a deletion module;
the deleting module is used for deleting the verified data in the verification database.
9. The system for real-time validation of data in a distributed database according to claim 6, wherein the data in the distributed database is distributed among a plurality of data nodes according to a primary key hash, and the distributed database and the validation database are located in different physical servers.
10. The system for real-time validation of data in a distributed database according to claim 6, wherein said validation module validates by:
and in the verification database, querying the verification database by using an aggregation class function and/or a sorting class function which are not supported by the distributed database so as to verify the correctness of the operation.
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