Hi Gilad,
Why do you recommend KVM over XEN? Have you fiddled with both? Are there
particular problems with XEN?
Thanks,
- yba
On Mon, 18 Jan 2010, Gilad Ben-Yossef wrote:
Date: Mon, 18 Jan 2010 12:33:26 +0200
From: Gilad Ben-Yossef <[email protected]>
To: Michael Lewinger <[email protected]>
Cc: Arie Blum <[email protected]>,
Israeli Linux mailing list <[email protected]>,
Oleg Kovalev <[email protected]>
Subject: Re: better platform for virtualization
Hi,
Michael Lewinger wrote:
I'd like to ask your oppinion on the virtualization of several WINDOWS
servers installed on a client's medium business server room. There are
about 6 crucial servers (priority, exchange, file server, and some others)
that need to be accessible when they fail. Currently, each server has its
own RAID storage. There is only 300GB of data to be kept on those servers
(mostly exchange and file server). The virtualized servers should become
alive when one of those main servers dies, and theoretically, no more than
2 VMs should be running in parallel.
What would be the best virtualization platform for such a requirement ?
Windows 2008 server, or XEN ?
I recommend KVM.
Would a fast single Xeon processor be able to handle this requirements ?
8GB or 4GB ?
Processor power is almost certainly not the bottle neck in your setup. I
would guess it is disk IO. But you really can't tell without measuring.
Would you consider VMWARE on top of CENTOS ?
I assume you mean vmware server. Putting a critical resource on a freebie
proprietary program on top of an excellent OS but without formal support
contract does not sound like a good plan to me.
Just get RHEL 5.4 with the (KVM based) server virtualization option.
We have a setup with earlier version of KVM running for over two years 22/7
(no typo, they sleep nights ) as a critical system with up to 30 VMs at any
given time in a demanding setup. We had only a single crash (and the version
we used is two years old) I would run my pacemaker software on KVM if I could
and if I had a pacemaker ;-)
Gilad.
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