On Thu, Apr 25, 2013 at 1:35 PM, Tom Coughlan <coughlan@redhat.com> wrote: > >> I know that you have to quiesce SQL databases using their own native >> tools if you want to have a consistent snapshot of the raw db files, but >> what about other programs like postfix or dovecot that are constantly >> (on a busy server) writing to disk? Do you need to stop these, take the >> snapshot, then restart them? Or will the filesystem itself handle this >> (similar to how VSS works on windows)? > > The LVM management tools will automatically suspend the file system > before taking the snapshot. Refer to the following, from the RHEL 6.4 > Storage Administration Guide: But having the file system suspended doesn't mean that the files are in a consistent state from any application's point of view, does it? Linux fsync() performance has historically been so bad that I would not expect most applications to use it. -- Les Mikesell lesmikesell@gmail.com _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/