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[Xen-users] Image file or partitions over an iSCSI?

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] Image file or partitions over an iSCSI?
From: Ivan Porro <pivan@xxxxxxxxxxxxx>
Date: Fri, 21 Sep 2007 09:57:06 +0200
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Dear all,

I will setup soon an Infortrend iSCSI SAN device with a raid6 volume and a DELL PE1950 (8 VMs) with a Qlogic iSCSI HBA (server to be duplicated at later time for redundancy).

My priorities are:

1) VMs on the iSCSI SAN in order to boot them also by another server if the first one fails

2) performances

3) live migration is a non mandatory option (i.e. I can suffer to shutdown machines and restart them with minor service interruption, maybe with a heartbeat script)

My questions are:

The server(s) will have a raid 1 with two 74GB sas 15krpm drives.
Where do you would store your VMs?
You would use partitions (i.e. a LUN for each VM) or images?
Swap files could be on the local disks?
Does a "local disk images and overnight mirror to the SAN" approach would be better in this case?

Religion question (optional...):

Waht would you prefere?

[ ] CentOS 5 with out of the box Xen
[ ] CentOS 5 with latest Xen
[ ] Debian 3.1 with latest Xen
[ ] Debian 4 with latest Xen

:-)

thank you anyway

        Ivan

P.S.
I'm available to perform tests on the above hardware if XenSource is interested, tell me what and how (from the 2nd week of October)
--
http://www.bio.dist.unige.it
voice: +39 010 353 2789
fax:   +39 010 353 2948

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