CN112765279A - Database synchronization method and system - Google Patents
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- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/27—Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system architectures therefor
Abstract
The invention discloses a database synchronization method and a system, wherein the method comprises the following steps: monitoring a database process of a source database to obtain incremental redo log data; analyzing the incremental redo log data to obtain SQL operation information; formatting the SQL operation information into an XML document; the XML document is transferred to the target database to perform database synchronization. The invention can improve the availability and reliability of real-time synchronization of the database.
Description
Technical Field
The present invention relates to the field of database synchronization, and more particularly, to a database synchronization method and system.
Background
Due to the advantages that the distributed system is low in cost and easy to deploy, and is easy to integrate with the existing system, most companies or enterprises adopt the distributed database mode, but due to the fact that the distributed database deployment location is different from the server, how to achieve real-time data synchronization among different databases becomes a key problem needing to be solved at present. The database synchronization means that mutually associated nodes in the system can synchronize changed data, that is, when the data of one node changes, another node or nodes can obtain a changed message, and the change is applied to the local database, so that the data consistency of the whole distributed system is maintained. Most of the existing database data real-time synchronization methods adopt a certain synchronization tool to realize data real-time synchronization, but the tools are complex in configuration, difficult to be compatible, poor in exception handling capacity and incapable of having high availability, high reliability, data security and high expandability.
Aiming at the problems of low availability reliability and poor exception handling capability of real-time synchronization of a database in the prior art, no effective solution is available at present.
Disclosure of Invention
In view of this, an object of the embodiments of the present invention is to provide a database synchronization method and system, which can improve availability and reliability of real-time database synchronization.
In view of the above object, a first aspect of the embodiments of the present invention provides a database synchronization method, including the following steps:
monitoring a database process of a source database to obtain incremental redo log data;
analyzing the incremental redo log data to obtain SQL operation information;
formatting the SQL operation information into an XML document;
the XML document is transferred to the target database to perform database synchronization.
In some embodiments, monitoring the database process of the source database to obtain the incremental redo log data includes:
continuously detecting the software and hardware environment and the starting state of the source database;
responding to the detected normal start of the source database in the software and hardware environment, and acquiring a file filtering drive file;
and monitoring the write operation of the database process on the redo log file by using the file filtering driving file, and aggregating the write operation into incremental redo log data.
In some embodiments, parsing the delta redo log data to obtain SQL operation information comprises:
detecting software and hardware environment to determine whether the source database starts an archiving mode;
in response to determining that the archive mode is open, parsing the archive files of the source database and synchronizing the historical operational data;
determining an archiving directory based on the archiving files, rearranging folders and files under the archiving directory according to the time sequence, and determining the position of incremental redo log data;
and obtaining and executing DML operation analysis on the folders and the files based on the incremental redo log data so as to generate and manage SQL operation information.
In some embodiments, formatting the SQL operation information into an XML document comprises:
standardizing the transmission format of the SQL operation information to obtain an original XML document;
monitoring the size of the original XML document, and in response to the size exceeding a preset limit value, packing and compressing the original XML document;
the compressed original XML document is encrypted as an XML document using a symmetric encryption algorithm.
In some embodiments, transmitting the XML document to the target database to perform database synchronization includes:
continuously detecting the software and hardware environment and the starting state of the target database;
receiving an XML document in a breakpoint continuous transmission mode through a TCP/IP network protocol in response to detecting that a target database is normally started in a software and hardware environment;
decrypting the XML document using a symmetric encryption algorithm;
in response to determining that the decrypted XML document is a compressed file, further decompressing the decrypted XML document to obtain an original XML document;
performing reverse conversion on the original XML document, and extracting SQL operation information;
and synchronizing the SQL operation information into the target database by using the SQL command execution unit.
A second aspect of an embodiment of the present invention provides a database synchronization system, including:
a processor; and
a memory storing program code executable by the processor, the program code when executed performing the steps of:
monitoring a database process of a source database to obtain incremental redo log data;
analyzing the incremental redo log data to obtain SQL operation information;
formatting the SQL operation information into an XML document;
the XML document is transferred to the target database to perform database synchronization.
In some embodiments, monitoring the database process of the source database to obtain the incremental redo log data includes:
continuously detecting the software and hardware environment and the starting state of the source database;
responding to the detected normal start of the source database in the software and hardware environment, and acquiring a file filtering drive file;
and monitoring the write operation of the database process on the redo log file by using the file filtering driving file, and aggregating the write operation into incremental redo log data.
In some embodiments, parsing the delta redo log data to obtain SQL operation information comprises:
detecting software and hardware environment to determine whether the source database starts an archiving mode;
in response to determining that the archive mode is open, parsing the archive files of the source database and synchronizing the historical operational data;
determining an archiving directory based on the archiving files, rearranging folders and files under the archiving directory according to the time sequence, and determining the position of incremental redo log data;
and obtaining and executing DML operation analysis on the folders and the files based on the incremental redo log data so as to generate and manage SQL operation information.
In some embodiments, formatting the SQL operation information into an XML document comprises:
standardizing the transmission format of the SQL operation information to obtain an original XML document;
monitoring the size of the original XML document, and in response to the size exceeding a preset limit value, packing and compressing the original XML document;
the compressed original XML document is encrypted as an XML document using a symmetric encryption algorithm.
In some embodiments, transmitting the XML document to the target database to perform database synchronization includes:
continuously detecting the software and hardware environment and the starting state of the target database;
receiving an XML document in a breakpoint continuous transmission mode through a TCP/IP network protocol in response to detecting that a target database is normally started in a software and hardware environment;
decrypting the XML document using a symmetric encryption algorithm;
in response to determining that the decrypted XML document is a compressed file, further decompressing the decrypted XML document to obtain an original XML document;
performing reverse conversion on the original XML document, and extracting SQL operation information;
and synchronizing the SQL operation information into the target database by using the SQL command execution unit.
The invention has the following beneficial technical effects: according to the database synchronization method and system provided by the embodiment of the invention, incremental redo log data is acquired by monitoring the database process of the source database; analyzing the incremental redo log data to obtain SQL operation information; formatting the SQL operation information into an XML document; the technical scheme of transmitting the XML document to the target database to execute the database synchronization can improve the availability and reliability of the real-time synchronization of the database.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a database synchronization method provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.
In view of the above-mentioned objects, a first aspect of the embodiments of the present invention provides an embodiment of a database synchronization method for improving availability and reliability of real-time database synchronization. Fig. 1 is a schematic flow chart of a database synchronization method provided by the present invention.
The database synchronization method, as shown in fig. 1, includes the following steps:
step S101, monitoring a database process of a source database to acquire incremental redo log data;
step S103, analyzing the incremental redo log data to obtain SQL operation information;
step S105, formatting the SQL operation information into an XML document;
step S107, transmitting the XML document to a target database to perform database synchronization.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), a Random Access Memory (RAM), or the like. Embodiments of the computer program may achieve the same or similar effects as any of the preceding method embodiments to which it corresponds.
In some embodiments, monitoring the database process of the source database to obtain the incremental redo log data includes:
continuously detecting the software and hardware environment and the starting state of the source database;
responding to the detected normal start of the source database in the software and hardware environment, and acquiring a file filtering drive file;
and monitoring the write operation of the database process on the redo log file by using the file filtering driving file, and aggregating the write operation into incremental redo log data.
In some embodiments, parsing the delta redo log data to obtain SQL operation information comprises:
detecting software and hardware environment to determine whether the source database starts an archiving mode;
in response to determining that the archive mode is open, parsing the archive files of the source database and synchronizing the historical operational data;
determining an archiving directory based on the archiving files, rearranging folders and files under the archiving directory according to the time sequence, and determining the position of incremental redo log data;
and obtaining and executing DML operation analysis on the folders and the files based on the incremental redo log data so as to generate and manage SQL operation information.
In some embodiments, formatting the SQL operation information into an XML document comprises:
standardizing the transmission format of the SQL operation information to obtain an original XML document;
monitoring the size of the original XML document, and in response to the size exceeding a preset limit value, packing and compressing the original XML document;
the compressed original XML document is encrypted as an XML document using a symmetric encryption algorithm.
In some embodiments, transmitting the XML document to the target database to perform database synchronization includes:
continuously detecting the software and hardware environment and the starting state of the target database;
receiving an XML document in a breakpoint continuous transmission mode through a TCP/IP network protocol in response to detecting that a target database is normally started in a software and hardware environment;
decrypting the XML document using a symmetric encryption algorithm;
in response to determining that the decrypted XML document is a compressed file, further decompressing the decrypted XML document to obtain an original XML document;
performing reverse conversion on the original XML document, and extracting SQL operation information;
and synchronizing the SQL operation information into the target database by using the SQL command execution unit.
The following further illustrates embodiments of the invention in terms of specific examples:
(1) constructing and deploying a data synchronization system: constructing and deploying a database data synchronization system comprising a log monitoring module, a log analysis module, a data transmission module and a data writing module;
(2) source database processing: monitoring the database process of the source database by using the log monitoring module in the step (1), and acquiring incremental redo log data;
(3) and log analysis processing: analyzing the incremental redo log data acquired in the step (2) by using the log analysis module in the step (1) to acquire SQL operation information;
(4) and (3) data transmission processing: converting the SQL operation information obtained in the step (3) into an XML document by using the data transmission module in the step (1), and transmitting the XML document to the data writing module;
(5) target database processing: and (3) synchronizing the XML document to a target database by using the data writing module in the step (1) to realize real-time synchronization of data between the databases.
The specific processing process of the source database processing is as follows:
s21: starting a log monitoring module, and detecting the software and hardware environment of the database and the starting state of a source database through a module initialization unit;
s22: when detecting that a source database is started, acquiring a file filtering drive file through a monitoring initialization unit and a timing scanning unit;
s23: and monitoring the writing operation of the database process on the redo log file by using the file filtering drive file, realizing the real-time monitoring of the database process and acquiring the incremental redo log data.
The specific processing procedure of the log analysis processing is as follows:
s31: the method comprises the steps that a source database initialization unit is used for checking software and hardware environments of a source database, whether a filing mode of the source database is started or not is checked, if the filing mode is started, a filing file is analyzed, historical operation data are synchronized, a filing directory of the source database is obtained, folders and files under the filing directory are arranged in sequence according to time, and a directory where online redo log data are located is obtained;
s32: and performing DML operation analysis on the redo log data by using a log analysis redo unit to obtain SQL operation information, and managing the SQL operation information by using a data storage subunit.
The specific processing procedure of the data transmission processing is as follows:
s41: before transmitting SQL operation information to a data writing module, carrying out standardized processing on a data transmission format of the SQL operation information by using an XML construction unit to obtain an XML document;
s42: the compression unit is used for monitoring the size of the XML document in the SSS1 in real time, a limit value is set, and if the XML document is larger than the limit value, the XML document is packaged and compressed;
s43: carrying out symmetric encryption on the compressed XML document by using an encryption unit, wherein the symmetric encryption algorithm is specifically an AES encryption algorithm;
s44: the encrypted XML document is sent to a data writing subsystem through a TCP/IP network protocol by using a data sending unit;
s45: and meanwhile, monitoring the transmission network by using the breakpoint continuous transmission unit, if the network is abnormal, storing the current transmission breakpoint, and continuing to transmit the task last time from the breakpoint after the network is normal.
The specific processing procedure of the target database processing is as follows:
s51: utilizing a target database initialization unit to check the software and hardware environment of a server where a target database is located, and detecting the starting condition of the target database;
s52: when the target database is detected to be in an open state, receiving the XML document by using the data receiving unit;
s53: the XML document is decrypted by the RSA algorithm through the data decryption unit;
s54: meanwhile, judging whether the XML document is compression software, if so, carrying out decompression operation;
s55: the XML analysis unit is used for carrying out reverse conversion on the XML document and extracting SQL operation information;
s56: and finally, synchronously executing the extracted SQL operation information to a connected target database by using an SQL command execution unit to realize the real-time synchronization of the data between the databases.
As can be seen from the foregoing embodiments, in the database synchronization method provided in the embodiments of the present invention, incremental redo log data is obtained by monitoring the database process of the source database; analyzing the incremental redo log data to obtain SQL operation information; formatting the SQL operation information into an XML document; the technical scheme of transmitting the XML document to the target database to execute the database synchronization can improve the availability and reliability of the real-time synchronization of the database.
It should be particularly noted that, the steps in the embodiments of the database synchronization method described above can be mutually intersected, replaced, added, or deleted, and therefore, these reasonable permutation and combination transformations should also belong to the scope of the present invention, and should not limit the scope of the present invention to the described embodiments.
In view of the above-mentioned objects, a second aspect of the embodiments of the present invention provides an embodiment of a database synchronization system for improving availability and reliability of real-time database synchronization. The database synchronization system includes:
a processor; and
a memory storing program code executable by the processor, the program code when executed performing the steps of:
monitoring a database process of a source database to obtain incremental redo log data;
analyzing the incremental redo log data to obtain SQL operation information;
formatting the SQL operation information into an XML document;
the XML document is transferred to the target database to perform database synchronization.
In some embodiments, monitoring the database process of the source database to obtain the incremental redo log data includes:
continuously detecting the software and hardware environment and the starting state of the source database;
responding to the detected normal start of the source database in the software and hardware environment, and acquiring a file filtering drive file;
and monitoring the write operation of the database process on the redo log file by using the file filtering driving file, and aggregating the write operation into incremental redo log data.
In some embodiments, parsing the delta redo log data to obtain SQL operation information comprises:
detecting software and hardware environment to determine whether the source database starts an archiving mode;
in response to determining that the archive mode is open, parsing the archive files of the source database and synchronizing the historical operational data;
determining an archiving directory based on the archiving files, rearranging folders and files under the archiving directory according to the time sequence, and determining the position of incremental redo log data;
and obtaining and executing DML operation analysis on the folders and the files based on the incremental redo log data so as to generate and manage SQL operation information.
In some embodiments, formatting the SQL operation information into an XML document comprises:
standardizing the transmission format of the SQL operation information to obtain an original XML document;
monitoring the size of the original XML document, and in response to the size exceeding a preset limit value, packing and compressing the original XML document;
the compressed original XML document is encrypted as an XML document using a symmetric encryption algorithm.
In some embodiments, transmitting the XML document to the target database to perform database synchronization includes:
continuously detecting the software and hardware environment and the starting state of the target database;
receiving an XML document in a breakpoint continuous transmission mode through a TCP/IP network protocol in response to detecting that a target database is normally started in a software and hardware environment;
decrypting the XML document using a symmetric encryption algorithm;
in response to determining that the decrypted XML document is a compressed file, further decompressing the decrypted XML document to obtain an original XML document;
performing reverse conversion on the original XML document, and extracting SQL operation information;
and synchronizing the SQL operation information into the target database by using the SQL command execution unit.
As can be seen from the foregoing embodiments, in the system provided in the embodiments of the present invention, incremental redo log data is obtained by monitoring a database process of a source database; analyzing the incremental redo log data to obtain SQL operation information; formatting the SQL operation information into an XML document; the technical scheme of transmitting the XML document to the target database to execute the database synchronization can improve the availability and reliability of the real-time synchronization of the database.
It should be particularly noted that the embodiment of the system described above employs the embodiment of the database synchronization method to specifically describe the working process of each module, and those skilled in the art can easily think that these modules are applied to other embodiments of the database synchronization method. Of course, since the steps in the embodiment of the database synchronization method may be mutually intersected, replaced, added, or deleted, these reasonable permutations and combinations should also fall within the scope of the present invention, and should not limit the scope of the present invention to the embodiment.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to these examples; within the idea of an embodiment of the invention, also technical features in the above embodiment or in different embodiments may be combined and there are many other variations of the different aspects of an embodiment of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present invention are intended to be included within the scope of the embodiments of the present invention.
Claims (10)
1. A database synchronization method, comprising performing the steps of:
monitoring a database process of a source database to obtain incremental redo log data;
analyzing the incremental redo log data to obtain SQL operation information;
formatting the SQL operation information into an XML document;
the XML document is transmitted to a target database to perform database synchronization.
2. The method of claim 1, wherein monitoring the database process of the source database to obtain incremental redo log data comprises:
continuously detecting the software and hardware environment and the starting state of the source database;
responding to the detected normal starting of the source database in the software and hardware environment, and acquiring a file filtering driving file;
and monitoring the writing operation of the database process on the redo log file by using the file filtering driving file, and aggregating the writing operation into the incremental redo log data.
3. The method of claim 2, wherein parsing the incremental redo log data to obtain SQL operation information comprises:
detecting the software and hardware environment to determine whether the source database starts an archiving mode;
in response to determining that an archive mode has been turned on, parsing an archive file of the source database and synchronizing historical operational data;
determining an archive directory based on the archive file, rearranging folders and files under the archive directory according to a time sequence, and determining the position of the incremental redo log data;
and obtaining and executing DML operation analysis on the file folder and the file based on the incremental redo log data so as to generate and manage SQL operation information.
4. The method of claim 1, wherein formatting the SQL operation information into an XML document comprises:
normalizing the transmission format of the SQL operation information to obtain an original XML document;
monitoring the size of the original XML document, and in response to the size exceeding a preset limit value, packing and compressing the original XML document;
encrypting the compressed original XML document as the XML document using a symmetric encryption algorithm.
5. The method of claim 4, wherein transferring the XML document to a target database to perform database synchronization comprises:
continuously detecting the software and hardware environment and the starting state of the target database;
receiving the XML document in a breakpoint continuous transmission mode through a TCP/IP network protocol in response to detecting that the target database is normally started in the software and hardware environment;
decrypting the XML document using the symmetric encryption algorithm;
in response to determining that the decrypted XML document is a compressed file, further decompressing the decrypted XML document to obtain the original XML document;
performing reverse conversion on the original XML document, and extracting the SQL operation information;
and synchronizing the SQL operation information to the target database by using an SQL command execution unit.
6. A database synchronization system, comprising:
a processor; and
a memory storing program code executable by the processor, the program code when executed performing the steps of:
monitoring a database process of a source database to obtain incremental redo log data;
analyzing the incremental redo log data to obtain SQL operation information;
formatting the SQL operation information into an XML document;
the XML document is transmitted to a target database to perform database synchronization.
7. The system of claim 6, wherein monitoring the database process of the source database to obtain the incremental redo log data comprises:
continuously detecting the software and hardware environment and the starting state of the source database;
responding to the detected normal starting of the source database in the software and hardware environment, and acquiring a file filtering driving file;
and monitoring the writing operation of the database process on the redo log file by using the file filtering driving file, and aggregating the writing operation into the incremental redo log data.
8. The system of claim 7, wherein parsing the incremental redo log data to obtain SQL operation information comprises:
detecting the software and hardware environment to determine whether the source database starts an archiving mode;
in response to determining that an archive mode has been turned on, parsing an archive file of the source database and synchronizing historical operational data;
determining an archive directory based on the archive file, rearranging folders and files under the archive directory according to a time sequence, and determining the position of the incremental redo log data;
and obtaining and executing DML operation analysis on the file folder and the file based on the incremental redo log data so as to generate and manage SQL operation information.
9. The system of claim 6, wherein formatting the SQL operation information into an XML document comprises:
normalizing the transmission format of the SQL operation information to obtain an original XML document;
monitoring the size of the original XML document, and in response to the size exceeding a preset limit value, packing and compressing the original XML document;
encrypting the compressed original XML document as the XML document using a symmetric encryption algorithm.
10. The system of claim 9, wherein transferring the XML document to a target database to perform database synchronization comprises:
continuously detecting the software and hardware environment and the starting state of the target database;
receiving the XML document in a breakpoint continuous transmission mode through a TCP/IP network protocol in response to detecting that the target database is normally started in the software and hardware environment;
decrypting the XML document using the symmetric encryption algorithm;
in response to determining that the decrypted XML document is a compressed file, further decompressing the decrypted XML document to obtain the original XML document;
performing reverse conversion on the original XML document, and extracting the SQL operation information;
and synchronizing the SQL operation information to the target database by using an SQL command execution unit.
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| CN113312320A (en) * | 2021-05-26 | 2021-08-27 | 上海商甲信息科技有限公司 | Method and system for acquiring user operation database behavior |
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| CN113312320A (en) * | 2021-05-26 | 2021-08-27 | 上海商甲信息科技有限公司 | Method and system for acquiring user operation database behavior |
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