Database disaster recovery method and device

Abstract

The invention relates to the technical field of data disaster recovery, and provides a database disaster recovery method and device, and the method comprises the steps: deploying a main database and a backup database on different physical servers, and carrying out the communication through network connection; the main database continuously writes the operation log into a log file, and transmits the log file to the backup database through a network to realize log synchronization; the backup database can recover and update the database according to the received log file; when the main database breaks down or the network is interrupted, the system can automatically switch the backup database into the main database so as to achieve fault transfer and disaster recovery switching. According to the method, a log synchronization technology is utilized to realize database disaster recovery backup and fault switching so as to ensure data reliability and service continuity.

Description

Technical Field

[0001] The present invention relates to the technical field of database design, and in particular to a database disaster recovery method and device. Background Art

[0002] In the modern information environment, databases carry important business data of organizations and enterprises. Once a failure or disaster occurs, it will cause huge losses and business interruption. Traditional database disaster recovery methods often face problems such as long disaster recovery time and high cost, and cannot meet the needs of large-scale applications. Summary of the invention

[0003] The present invention provides a database disaster recovery method and device, aiming to solve the shortcomings of traditional database disaster recovery methods. Its innovation lies in that multiple database nodes are deployed in different geographical locations and data synchronization is used to achieve database disaster recovery backup and high availability.

[0004] In a first aspect, the present invention provides a database disaster recovery method, comprising: Deploy the primary database and backup database on different physical servers and communicate through network connections; The primary database continuously writes operation logs into log files and transmits the log files to the backup database through the network to achieve log synchronization; The backup database will restore and update the database based on the received log files; When the primary database fails or the network is interrupted, the system will automatically switch the backup database to the primary database to achieve failover and disaster recovery switching.

[0005] Furthermore, the deployment of the main database and the backup database on different physical servers includes: the main database is used to process the read and write requests of the users, while the backup database is mainly used for data redundancy and disaster recovery purposes.

[0006] Furthermore, the master database continuously writes the operation log into the log file, including: enabling the transaction log function in the master database, and the log file will contain information such as the start, commit, and rollback of the transaction, as well as the data modification operations performed on the database. The master database writes all modification operations into the transaction log file to achieve functions such as data recovery, transaction persistence, database replication, and high availability.

[0007] Furthermore, the log file is transmitted to the backup database via the network, including: the disaster recovery system uses the appropriate function of the selected API to configure the connection parameters of the main database and establish a connection with the database. This includes specifying the address, port number, and credential information (such as user name and password) of the database server. Then, the functions or methods provided by the API are used to obtain the latest logical log information of the main database in real time, and parse and process it to extract key information or convert it into an appropriate format. Finally, the API provided by the backup database is used to transmit the parsed log data to the backup database via the network.

[0008] Furthermore, the recovery and update of the database includes: the backup database starts a log application, parses the received logical log file according to its format and content, and extracts key update operations or data changes. By calling the API of the backup database and executing the corresponding SQL statement or command, the changes in the log are applied to the corresponding table or data set of the backup database. By applying each operation in the logical log file, the backup database can update its own data state to a state consistent with that of the primary database.

[0009] Furthermore, the system automatically switches the backup database to the primary database, including: the disaster recovery system establishes a heartbeat connection between the primary database and the backup database, and monitors the availability of the primary database through regular heartbeat detection. When the heartbeat connection is disconnected due to a failure of the primary database or a network interruption, the disaster recovery system will update the network configuration, start the service, reallocate the IP address, etc., so that the entire system can be seamlessly switched to the backup database.

[0010] In a second aspect, the present invention provides a database disaster recovery device, comprising: Data replication module: responsible for replicating the data in the primary database to the backup database in real time or periodically; Fault detection module: used to monitor the status of the primary database and trigger disaster recovery operations when the primary database is detected to be faulty or unavailable; Automatic switching module: When the main database fails, the backup database is automatically triggered to become the new main database, realizing automatic switching; Backup and recovery module: responsible for backing up the data of the main database and restoring the data when necessary; Monitoring and alarm module: monitors the operating status of the main database and backup database in real time, and triggers corresponding alarm mechanisms in abnormal situations; Disaster recovery test module: To verify the availability and reliability of the disaster recovery device, it provides disaster recovery drill and test functions; Configuration management module: used to manage the configuration information of the database disaster recovery device, including the connection information of the primary database and the backup database, replication strategy, switching strategy, alarm settings, etc.

[0011] The present invention provides a database disaster recovery method and device, which realizes mutual disaster recovery between databases. During operation, the modification operation is completed by the main database, and the query operation is completed by the backup database, so that load balancing can be achieved. Moreover, the entire disaster recovery process basically does not require manual intervention, and all actions are completed automatically. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0013] Figure 1 is a flowchart of an implementation of a database disaster recovery method provided by an embodiment of the present invention;

[0014] Figure 2 It is a module diagram of a database disaster recovery device according to an embodiment of the present invention;

[0015] Figure 3 It is a load balancing function principle diagram of an embodiment of the present invention. Implementation

[0016] In order to enable those skilled in the art to better understand the technical solution of the present invention, a database disaster recovery method and device provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0017] Figure 1 It is a flowchart of the implementation of the database disaster recovery method provided by the present invention; Deploy the primary database and backup database on different physical servers and communicate through network connections; The primary database continuously writes operation logs into log files and transmits the log files to the backup database through the network to achieve log synchronization; The backup database will restore and update the database based on the received log files; When the primary database fails or the network is interrupted, the system will automatically switch the backup database to the primary database to achieve failover and disaster recovery switching.

[0018] In the embodiment of the present invention, the primary database and the backup database are deployed on different physical servers and communicate through a network connection. The specific process can be divided into the following steps: Deploy the master database: Install the database software on a physical server and create a master database instance. The master database is used to process user read and write requests, including operations such as inserting, updating, and deleting data. Ensure that the hardware resources of the master database are sufficient to meet business needs and configure appropriate performance optimization parameters; Deploy a backup database: Install the same version of database software on another physical server and create a backup database instance. The backup database is synchronized with the primary database so that it can be quickly switched to the backup database when the primary database fails or is damaged; Network connection: Establish a reliable network connection between the primary database and the backup database, usually using a LAN connection or a dedicated network connection. Ensure that the stability and bandwidth of the network connection are sufficient to support data synchronization and communication between the primary and backup databases.

[0019] In the embodiment of the present invention, the primary database continuously writes the operation log into the log file, and transmits the log file to the backup database through the network to achieve log synchronization, which is divided into the following steps: Enable the transaction log function in the master database. The log file will contain information such as the start, commit, and rollback of the transaction, as well as data modification operations on the database. The master database writes all modification operations into the transaction log file to achieve data recovery, transaction persistence, database replication, and high availability functions; The disaster recovery system uses the appropriate functions of the selected API to configure the primary database connection parameters and establish a connection with the database. This includes specifying the address, port number, and credential information (such as user name and password) of the database server. Then, the functions or methods provided by the API are used to obtain the latest logical log information of the primary database in real time, parse and process it, extract key information, or convert it into an appropriate format. Finally, the API provided by the backup database is used to transmit the parsed log data to the backup database through the network.

[0020] In an embodiment of the present invention, the backup database will restore and update the database according to the received log file, including: the backup database will start a log application, parse the received logical log file according to its format and content, and extract key update operations or data changes. By calling the API of the backup database and executing the corresponding SQL statement or command, the changes in the log are applied to the corresponding table or data set of the backup database. By applying each operation in the logical log file, the backup database can update its own data state to a state consistent with that of the main database.

[0021] In an embodiment of the present invention, when a failure occurs in the main database or the network is interrupted, the system will automatically switch the backup database to the main database to achieve failover and disaster recovery switching, including: the disaster recovery system establishes a heartbeat connection between the main database and the backup database, and monitors the availability of the main database through regular heartbeat detection. After the heartbeat connection is disconnected due to a failure in the main database or a network interruption, the disaster recovery system will first adjust the network routing, IP address and other related configurations to ensure that the backup system can take over the network resources of the original system. Then the database service, Web server, application program, etc. in the backup system will be started to ensure that the backup system can provide business functions normally. If the IP address used by the original system conflicts with the backup system, the disaster recovery system needs to reallocate the IP address of the backup system to ensure that the entire system can operate normally after switching.

[0022] Figure 2 It is a module diagram of the database disaster recovery device provided by the present invention, which specifically includes: Data replication module: responsible for replicating the data in the primary database to the backup database in real time or periodically; Fault detection module: used to monitor the status of the primary database and trigger disaster recovery operations when the primary database is detected to be faulty or unavailable; Automatic switching module: When the main database fails, the backup database is automatically triggered to become the new main database, realizing automatic switching; Backup and recovery module: responsible for backing up the data of the main database and restoring the data when necessary; Monitoring and alarm module: monitors the operating status of the main database and backup database in real time, and triggers corresponding alarm mechanisms in abnormal situations; Disaster recovery test module: To verify the availability and reliability of the disaster recovery device, it provides disaster recovery drill and test functions; Configuration management module: used to manage the configuration information of the database disaster recovery device, including the connection information of the primary database and the backup database, replication strategy, switching strategy, alarm settings, etc.

[0023] In the embodiment of the present invention, the general steps of implementing the data replication module are as follows: Configure the primary and backup databases: Perform proper configuration between the primary and backup databases to ensure that they can communicate and transfer data. Configuration includes network connection, authorized access, and database parameter settings; Configure replication parameters: Configure the appropriate functions of the selected API on the disaster recovery system to configure the primary database and backup database connection parameters. This includes specifying the database server address, port number, and credential information (such as user name and password); Start the data replication process: Start the data replication module to start data replication between the primary database and the backup database; Real-time or periodic data replication: The backup database starts a log application, parses the received logical log file according to its format and content, and extracts key update operations or data changes. By calling the backup database API and executing the corresponding SQL statements or commands, the changes in the log are applied to the corresponding tables or data sets of the backup database. By applying each operation in the logical log file, the backup database can update its own data status to be consistent with that of the primary database.

[0024] In the embodiment of the present invention, the general functions of the fault detection module are as follows: Monitor the status of the primary database: Monitor the status of the primary database regularly or in real time, including connection status, response time, load, error log and other information, to determine whether the primary database is running normally; Set up fault detection algorithm: Design and implement fault detection algorithm according to actual needs and database characteristics. Fault detection algorithm can be based on different indicators, such as the response time of the primary database exceeds the threshold, unable to connect to the primary database, etc., to determine whether the primary database has a fault; Triggering disaster recovery operations: Once the fault detection module detects that the primary database has failed or is unavailable, a disaster recovery operation will be triggered.

[0025] In the embodiment of the present invention, the functions of the automatic switching module are as follows: Update connection information: Once the backup database is switched to the new primary database, the automatic switching module needs to update the connection information of related systems to ensure that the application can correctly connect to the new primary database. This includes updating application configuration, DNS records, load balancers, etc. Complete switch confirmation: The automatic switch module needs to further confirm the results of the switch operation. You can confirm whether the switch is successful by checking the status of the new primary database, testing the connection with the application, and comparing data.

[0026] Figure 3 It is a load balancing function principle diagram of an embodiment of the present invention.

[0027] The client sends a service request to the disaster recovery system server. The disaster recovery system parses the received SQL statement, separates the modification operation request and the query request in the SQL statement, and sends the modification operation request to the primary database and the query operation request to the standby database. The stream replication principle is adopted, that is, the physical log of the primary database is transmitted to the standby database in the form of a "stream". The standby database replays the incoming logs one by one through the replication process and writes them into the physical log of the standby machine. This method can effectively improve the availability and data security of the database, and avoid data loss and business interruption caused by single point failures. In addition, this method also has high flexibility and scalability, and can be configured and adjusted according to actual needs.

Claims

1. A database disaster recovery method, characterized in that: include: Deploy the primary database and backup database on different physical servers and communicate through network connections; The primary database continuously writes operation logs into log files and transmits the log files to the backup database through the network to achieve log synchronization; The backup database will restore and update the database based on the received log files; When the primary database fails or the network is interrupted, the system will automatically switch the backup database to the primary database to achieve failover and disaster recovery switching.

2. A database disaster recovery method according to claim 1, characterized in that: The main database and the backup database are deployed on different physical servers, including: the main database is used to process the read and write requests of the users, and the backup database is mainly used for data redundancy and disaster recovery.

3. A database disaster recovery method according to claim 1, characterized in that: The master database continuously writes the operation log into the log file, including: enabling the transaction log function in the master database, the log file will contain information such as the start, commit, rollback, and other information of the transaction, as well as the data modification operations performed on the database. The master database writes all modification operations into the transaction log file.

4. A database disaster recovery method according to claim 1, characterized in that: The log file is transmitted to the backup database through the network, including: establishing a connection between the disaster recovery system and the database, and using the API provided by the database to obtain the logical log information. By using the API, the latest log information can be obtained in real time or regularly and transmitted to the backup database.

5. A database disaster recovery method according to claim 1, characterized in that: The recovery and update of the database includes: the backup database starts a log application program to apply the received logical log file to its own database. By applying each operation in the logical log file, the backup database can update its own data state to a state consistent with that of the primary database before the failure.

6. A database disaster recovery method according to claim 1, characterized in that: The system automatically switches the backup database to the primary database, including: the disaster recovery system establishes a heartbeat connection between the primary database and the backup database, and monitors the availability of the primary database through regular heartbeat detection. When the heartbeat connection is disconnected due to a failure of the primary database or a network interruption, the disaster recovery system will update the network configuration, start the service, reallocate the IP address, etc., so that the entire system can be seamlessly switched to the backup database.

7. A database disaster recovery device, characterized in that: The system includes the following modules: Data replication module: responsible for replicating the data in the primary database to the backup database in real time or periodically; Fault detection module: used to monitor the status of the primary database and trigger disaster recovery operations when the primary database is detected to be faulty or unavailable; Automatic switching module: When the main database fails, the backup database is automatically triggered to become the new main database to achieve automatic switching; Backup and recovery module: responsible for backing up the data of the main database and restoring the data when necessary; Monitoring and alarm module: monitors the operating status of the main database and backup database in real time, and triggers corresponding alarm mechanisms in abnormal situations; Disaster recovery test module: To verify the availability and reliability of the disaster recovery device, it provides disaster recovery drill and test functions; Configuration management module: used to manage the configuration information of the database disaster recovery device, including the connection information of the primary database and the backup database, replication strategy, switching strategy, alarm settings, etc.

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