On Mon, Sep 09, 2002 at 12:35:10PM -0500, Jeremy Tinley wrote: > This handles part of the problem but a true load balanced master > solution is needed. There's no real advantage in spending 5, 10 or > $20,000 on a failover master if you can't load balance and the spare > will just sit idle.
Sure there is. If your master blows up, you have a spare waiting to take its place. It may not solve your problem, but it is a "real" advantage for some folks. > Master servers should intelligently talk to each other and determine > duplicate key problems. What if the masters are a few thousand miles apart with 80-120ms network latency? You may gain some load-handling capabilities (in theory), but you're got a serious bottleneck to deal with. > You could create an LVS cluster of masters. You would have to write > some hand code to remove a master from the cluster when it is behind > so when a master is brought back up, it's out of the cluster until > it has caught up. And that's not terribly difficult to do as long as you have a reasonable definition of "behind". > Then toss in some code to sync the downed master with the current > running ones. Instead of using MySQL's native replication? > Perhaps you could point replication to the LVS IP instead of a > specific machine. When it comes back up, it will find a valid > master to connect to via LVS, replicate, and then rejoin the > collective... err, cluster. :) The trick is to make sure that all the masters have EXACTLY the same data in their binary logs (give or take the server-id). Jeremy -- Jeremy D. Zawodny | Perl, Web, MySQL, Linux Magazine, Yahoo! <[EMAIL PROTECTED]> | http://jeremy.zawodny.com/ MySQL 3.23.51: up 34 days, processed 686,097,244 queries (230/sec. avg) --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
