good luck i would call snapshots on a running system much more dumb than "innodb_flush_log_at_trx_commit = 2" on systems with 100% stable power instead waste IOPS on shared storages
Am 01.11.2012 16:45, schrieb Singer Wang: > Assuming you're not doing dumb stuff like innodb_flush_log_at_tx=0 or 2 and > etc, you should be fine. We have been > using the trio: flush tables with read lock, xfs_freeze, snapshot for months > now without any issues. And we test > the backups (we load the backup into a staging once a day, and dev once a > week) > > On Thu, Nov 1, 2012 at 11:41 AM, Reindl Harald <h.rei...@thelounge.net > <mailto:h.rei...@thelounge.net>> wrote: > > > Why do you need downtime? > > because mysqld has many buffers in memory and there > is no atomic "flush buffers in daemon and freeze backend FS" > > short ago there was a guy on this list which had to realize > this the hard way with a corrupt slave taken from a snapshot > > that's why i would ALWAYS do master/slave what means ONE time > down (rsync; stop master; rsync; start master) for a small > timewindow and after that you can stop the slave, take a > 100% consistent backup of it's whole datadir and start > the slave again which will do all transactions from the > binarylog happened in the meantime
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