Retrying Failed Reads with MaxScale's Read/Write Split Router

Overview

The Read/Write Split Router (readwritesplit) routes write queries to the primary server and load balances read-only queries between one or more replica servers. If a read-only query fails, then the router can retry the query on a different server.

Configuring Retries for Failed Reads

  1. Configure retries for failed reads by configuring the retry_failed_reads parameter for the Read/Write Split Router in maxscale.cnf.

    For example:

    [split-router]
type                     = service
router                   = readwritesplit
...
retry_failed_reads       = true

  2. Restart the MaxScale instance.

    $ sudo systemctl restart maxscale