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[Xen-users] DRBD and Xen - LVM on the top or not
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| Subject: | [Xen-users] DRBD and Xen - LVM on the top or not |
| From: | Antonin Kral <A.Kral@xxxxxxxx> |
| Date: | Tue, 13 Jan 2009 07:38:42 +0100 |
| Delivery-date: | Mon, 12 Jan 2009 22:40:35 -0800 |
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Hello,
I am evaluating setup for our small cluster of two (maybe 4 at the end)
machines to have ha setup with support for live migrations and
snapshotting. I have ended up with two possible scenarios:
a) HDD -> LVM -> DRBD -> Xen domU
b) HDD -> LVM -> DRBD -> CLVM -> Xen domU
Option a) looks nicer to be because it is a bit simpler and I assume
(maybe incorrectly) that DRBD synchronization in case of failure will be
faster and I feel a little bit safer with no need for day-to-day dual
master (primary) DRBD. On the other hand, I am a bit curious about
snapshotting - is it safe to do LVM LV snapshot under the DRBD device?
I would also need to run multi-master actively with option b), right?
Does anybody have such setup in day-to-day deployment?
I would appreciate any advices, thank you,
Antonin
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