8 Automatic Failover

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8 Automatic Failover

If a master failover occurs, the server will enforce one of two behaviors, specified by the Cluster healing mode radio buttons, located on the Details panel of the Clusters tab:
Select the Replace failed master with a new master radio button to specify that the cluster manager should create a new master to replace a failed master node.
Select the Replace failed master with existing replica radio button to specify that the cluster manager should promote a replica node to be the new master node for the cluster. Choose this option when speed of recovery is important, and your application can tolerate the loss of some transactions. This is the default behavior.
By design, EDB Ark does *not* perform a failover when the Postgres server is stopped, because the server stop or restart may be intentional:
If a user intentionally kills the postmaster process, the server will not failover; the postmaster process is responsible for restarting the server.

8 Automatic Failover

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