Is there a way to determine the amount of memory requred to create LVM snapshots for a given original volume size. On a server with 12G of memory (no load during testing), I get an "Cannot allocate memory" error when trying to take the snapshot of a 339G original volume. When I bumped memory to 16GB the snapshot was created, but unfortunately the SuperMicro Super8050 server is unstable with 16GB of memory (oopses on rsync and postgresql, seems to run everything else fine; memtest86 says the memory is fine). LVM2 on 2.4.21 does not successfully make the snapshot either; in fact, with LVM2, the snapshot fails and then locks the filesystem; upon reboot, the system hangs trying to mount the filesystems on the LVM volumes because of the locked one; the solution is to start a recue disk with LVM1 and vgscan -r (it would be nice if vgscan -r would work in LVM2). _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
