You can do a two-way replication. According to MySQL docs, however, this isn't recommended since atomicity of update operations (depending on the scenario, of course, this isn't a problem).
I'm not sure, but I think that making the master a slave of the slave that would become a master temporarily wouldn't work well because no binary logs will have been maintained for such slave (previous master). This is in theory, of course. Then, so far, I still think that copying by hand the data dir back to the master would be the best way (and easiest) to get the master up again and up-to-date. []s, Conrado ----- Original Message ----- From: Steve Williams To: cvarda Cc: Batara Kesuma ; [EMAIL PROTECTED] Sent: Tuesday, March 16, 2004 3:28 AM Subject: Re: Switch replication master Hi, Could you take the database down long enough (scheduled downtime) to make the master a slave to the slave? I seem to remember reading on this mail list that you can do circular replication... or am I talking nonsense? That way when you took the "original" master down for maintenance, then brought it up later, it would synchronize properly. Maybe someone more knowledgeable will respond... Cheers, Steve cvarda wrote: Depending on the size of your databases, it might be a good idea to copy back your 'data' directory from slave to master. I think this should work better, even because the master wouldn't get the INSERT/UPDATEs made on the slave. []s, Conrado ----- Original Message ----- From: "Batara Kesuma" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, March 15, 2004 2:30 PM Subject: Switch replication master Hi, I use replication with 1 master and 1 slave. Right now the slave is only used to make a backup. Next week I am going to change my master motherboard. So I need to take it offline for a while (about 90 minutes). I am thinking about switching the master for that 90 minutes, so the slave will become master when master is offline, and after master is back online switch back slave to slave. Here is how I am going to do it: 1. Change all my code to make the DB query to slave. 2. Take master offline, change motherboard. 3. Master back online. How do I switch back the master now? Any idea? I don't mind to take offline both slave and master for a while if it is not too long. Please help. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
