What is the best way to change the replication scheme of 2 currently replicated slaves?

Posted by mmattax on Server Fault See other posts from Server Fault or by mmattax
Published on 2010-06-04T15:31:42Z Indexed on 2010/06/07 11:02 UTC
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mysql

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mysql-replication

I have MySQL replication set up in production as follows:

DB1 -> DB2
DB1 -> BAK

Where DB2 and BAK are slaves to DB1. All 3 servers are in sync (0 seconds behind the master) and have 30+ GB of data.

I'd like to put the servers in a new master-slave configuration as follows:

DB1 -> DB2 -> BAK

What is the best way to change the master host on BAK?

Is there a way to avoid having to stop the slave thread on DB2 and getting a mysqldump for BAK (a 5-6 hour processes) ?

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