causal_reads

This page is part of MariaDB's SkySQL Documentation.

The parent of this page is: Module Parameters for MariaDB MaxScale

Topics on this page:

Overview
DETAILS
CHANGE HISTORY
EXTERNAL REFERENCES

Overview

Configures read causality, reads subsequent to writes issued in manner to reduce replication lag.

DETAILS

Read/Write Split router supports read causality operations. When enabled, following write operations, MaxScale adjusts subsequent reads to reduce replication lag.

Option	Description
`none`	Disables read causality.
`local`	Writes visible to the connection that issues the write statement, waits for the Replica Server to catch up. Writes performed by other connections are not visible.
`global`	Writes visible to all connections. When one connection performs a write, all connections to the same service can see it.
`fast`	Writes visible to the connection that issues the write statement, but does not wait for the Replica Server to catch up. Writes performed by other connections are not visible.

CHANGE HISTORY

Release Series	History
22.08	Present starting in MariaDB MaxScale 22.08.0.
6	Present starting in MariaDB MaxScale 6.0.0.

EXTERNAL REFERENCES

This page shows information specific to MariaDB SkySQL. Information for non-SkySQL use can be found on the causal_reads page in the MariaDB Enterprise Documentation.