On Sunday 30 October 2005 14:28, Marc Perkel wrote: > Ajay Sharma wrote: > > Marc Perkel wrote: [snip] > >> > >> How does everyone else deal with this? > > > > Have you looked into MySQL replication? > > > > http://dev.mysql.com/doc/refman/5.0/en/replication.html > > > > I have a master/slave setup and the slave is there for two reasons: > > > > 1) nightly dumps > > 2) emergency backup. > > > > So every night, the database is locked and we do a full mysqldump on > > every database. Once the lock is removed, the slave sync's back up > > with the master. > > > > If the master dies then we can switch all of our machines to start > > using the slave until the master comes back online. It's not > > automatic, but it won't take too long. > > > > --Ajay > > Thanks - I'll look ast it. Is it hard to set up? Does it require all > databases sysc or can you set them up individually?
It's not hard to setup through I've had problems with the AWL and Bayes tables breaking periodically. Doing a full mysqldump nightly as suggested above should help with that. To control fail-over, we use a pair of Gentoo boxes and ipvs to do load balancing and fail-over. SA talks to the virtual IP which points to the primary box or fails over to the back up if the primary is down. (Note: I am not currently using AWL or Bayes so the 2nd server is read-only. You can get around this by using a chained replication thing so A->B->A but that can be hairy to setup.) -- Randy Smith http://perlstalker.amigo.net/
