[linux-lvm] Long-term snapshots possible?
Jason Smith
jhs at openenterprise.biz
Tue Mar 11 09:12:02 UTC 2003
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Hi. Like many others, I'm interested in using LVM2 as a componet for a
Linux-based file server.
When needed, I had hoped to sacrifice disk space for long-term filesystem
snapshots, by creating multiple snapshots and rotating them out on
perhaps a weekly basis. The intent is to emulate the convenience and
power of similar snapshot features in commercial file servers.
My problem is, this does not currently look possible without a severe
performance hit. If a volume has, for example, five active snapshots,
then the deltas seem to get written five times, once per snapshot volume.
Alternatively, I could use meta-snapshots, but they are not currently
implemented, and that idea sounds klugy.
So then do the LVM developers and users recommend against multiple
concurrent snapshots of a volume? Should I keep hope for this great
feature, only found in commercial file servers?
Thanks for any input.
- --
Jason Smith
Open Enterprise Systems
Bangkok, Thailand
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