From: Marcus Bointon
Date: September 7 2010 5:17pm
Subject: Restore with a different master
List-Archive: http://lists.mysql.com/replication/1936
Message-Id: <7A07EEE4-C3AA-4D06-A35E-4AC68DFB6993@synchromedia.co.uk>
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I have a pair of servers running standard active/passive circular =
replication using mmm, call them A and B. I want to introduce new server =
C, ultimately to replace B. I'm setting it up by restoring an xtrabackup =
snapshot taken from B (using the practice of doing backups on a slave to =
keep backup traffic off the active master). I know the details of the =
master log and position for the backup, but it's from B not A, and =
though there must be one, I've no way of knowing what the corresponding =
log and position on A is.

Here's the background: I want to move from:

A <-> B

to (slave C from A)

C <- A <-> B

to (break replication back from B)

C <- A -> B

to (close loop from A to C)

C <-> A -> B

to (remove B)

C <-> A

As far as I can see I can either:
=95 Take a new backup from A
=95 Switch B to be active master and retire A instead (A and B are =
identical)

Any other suggestions?

Marcus
--=20
Marcus Bointon
Synchromedia Limited: Creators of http://www.smartmessages.net/
UK resellers of info@hand CRM solutions
marcus@stripped | http://www.synchromedia.co.uk/



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