Hi Jon, Not really. Each domU has it's own storage space - which can either > be a file or an LVM volume. In the instance that I described, we > "fooled" the domU by actually using LVM snapshots (let me know if > you're not familiar with the concept) thereby only physically having > one copy of the binaries. Anything that was written to those domU's > was written into the snapshot space. > > > How about swap? Dom0 of course has its swap -- and could/should be > RAIDed, > > but what about GuestOS' swap? I honestly haven't gotten that far yet > .... > > The domU's would each have their own swap, written to whatever > diskspace the domU occupies. > Yes, I'm familiar with LVM. But not well-versed at all in its application in a virtualized scenario. Given the RAID-1 goal of failover & backup, and a performance goal of not bunncessarily bogging down I/O, at the moment, I'm confused by "how many copies of each object" (binay, data, swap for Dom0 and each DomU) exist in the scenario you've proposed. I suspect much of this will be come clearer once I actually start "doing" (Hardware arriving in pieces over the next week ...). In the meantime, I need to skectch this out on paper and stare at it for awhile -- and hope for an "aha!" moment. Do you, perchance, have a good reference to a write-up of deploying your proposed scenario? Regards, Bob -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20071207/572f7e36/attachment-0005.html>