On Thu, 16 Oct 2003 10:09:27 -0700 Josh Berkus <[EMAIL PROTECTED]> wrote:
> Jeff, > > > I left the DB up while doing this. > > > > Even had a program sitting around committing data to try and corrupt > > things. (Which is how I discovered I was doing the snapshot wrong) > > Really? I'm unclear on the method you're using to take the snapshot, > then; I seem to have missed a couple posts on this thread. Want to > refresh me? > I have a 2 disk stripe LVM on /dev/postgres/pgdata/ lvcreate -L4000M -s -n pg_backup /dev/postgres/pgdata mount /dev/postgres/pg_backup /pg_backup tar cf - /pg_backup | gzip -1 > /squeegit/mb.backup umount /pg_backup; lvremove -f /dev/postgres/pg_backup; In a nutshell an LVM snapshot is an atomic operation that takes, well, a snapshot of hte FS as it was at that instant. It does not make a 2nd copy of the data. This way you can simply tar up the pgdata directory and be happy as the snapshot will not be changing due to db activity. -- Jeff Trout <[EMAIL PROTECTED]> http://www.jefftrout.com/ http://www.stuarthamm.net/ ---------------------------(end of broadcast)--------------------------- TIP 2: you can get off all lists at once with the unregister command (send "unregister YourEmailAddressHere" to [EMAIL PROTECTED])
