Features
CSS supports read/write splitting. Data written to the primary cluster (Leader) can be automatically synchronized to the secondary cluster (Follower). In this way, data is written to the primary cluster and queried in the secondary cluster. The read and write can be separated to improve the query performance (as shown in the left part of Figure 1). When the primary cluster is unavailable, the secondary cluster can provide data write and query services (as shown in the right part of Figure 1).
Currently, only clusters of versions 7.6.2 and 7.10.2 support read/write isolation. The versions of the primary and secondary clusters must be the same.
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