Solution overview
According to the hardware architecture and application software, the disaster recovery methods of database are mainly divided into < br > Disaster Recovery Solution for SQL Server under X86 Architecture
Mysql Disaster Recovery Solution under X86 Architecture
Disaster Recovery Solution for Oracle Single Database under X86 Architecture

The above three schemes mainly use i2Availability data real-time protection application to protect database business.
For the disaster-tolerant solution of Oracle RAC cluster under X86 architecture, and for the disaster-tolerant solution of Oracle RAC cluster under PC architecture, the above two schemes mainly use i2Active redolog to protect database business.
i2Availability
The X86 server with high performance is deployed in the disaster preparedness center as the disaster preparedness machine of Oracle, My Sql and SQL Server database servers. The application-level real-time replication and high availability are realized for the database servers.
i2Availability is based on real-time data replication technology. Firstly, the database files in the database server are transmitted to the disaster preparedness server in real time to ensure the data consistency between the two ends. If the production server fails, the production application will be seamlessly and dynamically switched to the disaster preparedness center to achieve business continuity.
i2Active
The X86 server with high performance is deployed in the disaster preparedness center as the disaster preparedness machine of Oracle database server, and the real-time replication and high availability at the database level are realized for Oralce RAC database server. Oracle data real-time replication based on redolog log analysis technology is adopted. Through the SCN (Oracle System Change Number) control mechanism, the data is completely copied from the provincial information center to the target end of the disaster preparedness center.
Replication can be fine-grained to the user or table level, transfer transaction instructions, and transmit data with minimal amount, which can ensure low-latency data asynchronous replication under low bandwidth.

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