Mysql MHA

Databases MySQL

MySQL MHA and Perl pathing

Ronald Bradford
August 26, 2013

I am certainly not a knowledgeable Perl person, however I recently ran into the error Can’t locate MHA/MasterMonitor.pm on Red Hat 6.x. I have installed MySQL MHA on various systems before without any issues.

Databases MySQL

Not a cool new feature for Master_Host

Ronald Bradford
January 4, 2013

I was surprised to find on a customer MySQL server this new syntax for Master_host in SHOW SLAVE STATUS. mysql> SHOW SLAVE STATUSG *************************** 1. row *************************** Slave_IO_State: Connecting to master Master_Host: testdb1.

Databases MySQL

Installing MySQL MHA with Percona Server

Ronald Bradford
January 3, 2013

MySQL MHA by Oracle ACE Director Yoshinori Matsunobu is an excellent open source tool to help in providing HA with native MySQL replication. The installation however is dependent on some Perl packages and to the untrained eye this may be an issue if you are using Percona Server as your choice of MySQL implementation.