Note, that if you guess wrong and create a snapshot that is too small, you can always grow the volume (lvextend). brassow On Mon, 2005-12-19 at 16:49 -0800, kelsey hudson wrote: > > Olivier Kaloudoff wrote: > > > Who can explain the usage of -L10M for my snapshot ? > > LVM snapshots have a limitation to how much data can change before the > snapshot becomes invalid. So, by using -L10M, you're saying to keep the > snapshot around until 10M of data has changed, then the snapshot becomes > invalid. > > Because of the way LVM snapshots work, they require extra space on a > volume. So, the size of your snapshot volume dictates how long it will > remain valid. A good rule of thumb is between 10% and 20% of your > primary volume's size. That way, 10 to 20% of the filesystem's contents > can change and your snapshot will remain valid. > > Hope this clears some things up for you. > > -Kelsey > > _______________________________________________ > 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/ _______________________________________________ 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/
