On Thu, Aug 12, 2004 at 11:09:25PM +1000, Russell Coker wrote: > > Did I do something wrong or is this an indication of a kernel bug in LVM? Which kernel, the FC2 errata kernel? Probably just a problem with the userspace side; grab the RPMS from Rawhide. I've been playing with snapshots since kernel-2.6.7-1.471 (i.e., 2.6.7-bk18) on both FC2 and FC1, using packages from Rawhide. I have another machine running 2.6.7-1.492 (2.6.7-rc1) that also seems to work, though it hasn't been tested much. (Both kernels patched and rebuilt without 4G/4G.) Snapshot performance was not particularly good (on soft-RAID1), but I ran bonnie++ on an 8GB filesystem with a snapshot in place, and it survived, even while running cpio -o > /dev/null on the snapshot. I need to find time to roll my patches forward, retest, and look at the tunables. > I just tried rebooted that machine. The LVM setup seems mangled and it > doesn't boot successfully. I encountered a "gotcha" when using snapshots (or DM mirror): if using an initrd, one needs to place those modules (dm-snapshot, dm-mirror) in the initrd, otherwise LVM2 won't activate the LVs when you reboot. Alexandre, where should this config info live? Historically, we had the loop stuff in /etc/fstab; thankfully, dependence on loop is going away. Regards, Bill Rugolsky
