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Re: [Xen-users] LVM2 snapshots and XEN = problem :(

I have also avoided using snapshots so far for the same reasons. I've also been looking at EVMS (as I have a SAN, but no raid controller, and I'd like to be able to give each domU a small fraction of a mirror and still be able to individually hot-migrate domains. I believe this can be done with EVMS. see

As for the LVM snapshot issues, I have avoided lvm snapshots so far out of fear of dom0 crashes. Would it be possible for me to export the master volume read-only to all the domUs, then have the domUs each create and mount their own writable snapshot in DomU-space? If it's in domU space, stability is less of a concern.

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] LVM2 snapshots and XEN = problem :(

On Friday 08 September 2006 4:59 am, Tobias K├Ânig wrote:
So i upgraded the lvm and libdevmapper packages to these versions and the
removal of the snapshots work without problems.

do you mean that the problem is in userspace and not on the kernel?  what
about using EVMS for volume management? since it uses the same kernel
facilities it might avoid the but if it's in userspace, but not if it's in

i haven't been able to reproduce the problem, but it really makes me nervous
to rely on snapshots for new designs

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