Summary
According to the hardware architecture and application software, database disaster recovery mode is mainly divided into:
DR solution for SQL Server under x86 architecture
DR solution for MySQL under x86 architecture
DR solution for single Oracle database under x86 architecture

The above three schemes are mainly used for database business protection through i2availability.
As regard to the disaster recovery solution to Oracle RAC cluster under x86 architecture or under small computer architecture, it protects the database business mainly by the mean of i2active’s redo log.
i2Availability
The high-performance x86 server is deployed in the disaster recovery center as the disaster recovery machine for Oracle, My SQL and SQL Server database servers to realize application-level real-time replication and high availability.
i2Availability, based on the real-time data replication technology, transmits the database files in the database server to the disaster recovery server in real time and ensures the data consistency at both ends. If the production server fails, disaster recovery center will seamlessly and dynamically take over the business service to realize the business continuity.
i2Active
The high-performance x86 server is deployed in the DR center as the DR machine of the Oracle database server, which applies oracle data real-time replication based on redo log analysis technology to realize database-level real-time replication and high availability. Through the SCN (Oracle system change number) control mechanism, the data can be totally synchronized from source end to the target end in disaster recovery center.
Synchronization can be done at the user or table level, to achieve low-latency data asynchronous synchronization with low bandwidth requirement.

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