Understanding MaxScale's Consistent Critical Read Filter

MaxScale's Consistent Critical Read Filter (ccrfilter) detects when a statement modifies the database, and it attaches routing hints to any subsequent statements, so they get routed to the primary server.

When to Use the Consistent Critical Read Filter?

The Consistent Critical Read Filter (ccrfilter) allows you to:

  • Perform causality checks for routers which did not natively support them.

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