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[Xen-users] Cheap and cheerful replication

  • To: xen-users@xxxxxxxxxxxxxxxxxxx
  • From: "msgbox450@xxxxxxxxx" <msgbox450@xxxxxxxxx>
  • Date: Mon, 6 Jun 2011 16:00:24 +0100
  • Delivery-date: Mon, 06 Jun 2011 08:04:46 -0700
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  • List-id: Xen user discussion <xen-users.lists.xensource.com>

Hi guys,

I wonder if anyone has found any simple solution for cheap and cheerful replication between two hosts (in this case for XCP)?

Basically I have two machines (A and B). I want to run 8 VMs on local storage on server A and 8 VMs on local storage on server B. I want all the machines on server A to be backed up to server B and vice versa. In the event of failure, I want to be able to run all 16 VMs on one host.

My current thought is to just set up NFS on both hosts and then set up nightly snapshots on each to copy to the other. However, it would be nice to have some proper block level replication going on instead so that live migration could be used.

Has anyone got any good ideas for this (and before anyone says it,  I don't want to involve any separate machines or network storage devices because that pushes the budget out of window, I want to find a way to make it work with a mirrored pair of hosts).

Thanks :D
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