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There are limitations to Galera Cluster Streaming Replication, This is definitely not the solution for all your Galera Replication challenges. The two major challenges with Galera Cluster Streaming Replication are ”\u00a0Performance bottlenecks during a transaction and rollback<\/em><\/span> ” , We have explained these below in detail:<\/p>\n

When Streaming Replication is enabled on Galera Cluster Version 4, the each node in the\u00a0cluster begins recording its write-sets to the wsrep_streaming_log table in the mysql database. This done to guarantee\u00a0the persistence of Streaming Replication updates in the event that they crash. But, This operations will increase the load on specific node, which definitely will be a performance bottleneck during peak load hours.<\/p>\n

If you ever rollback a transaction when Streaming Replication is in use, The rollback operation consumes the entire available system resources. So if your application frequently need to be rolled back, This will become a major performance bottleneck for Galera Cluster Streaming Replication Ops. So we strongly recommend\u00a0to use shorter transactions whenever possible. In the event that your application performs batch processing or scheduled housekeeping tasks, consider splitting these into smaller transactions in addition to using Streaming Replication.<\/p>\n","protected":false},"excerpt":{"rendered":"