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

[Ivan Porro <pivan@xxxxxxxxxxxxx>]

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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