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[Xen-users] Xen storage, Server with iSCSI or dedicated SAN?

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Subject: [Xen-users] Xen storage, Server with iSCSI or dedicated SAN?
From: Ivan Porro <pivan@xxxxxxxxxxxxx>
Date: Tue, 21 Aug 2007 17:43:14 +0200
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Hi all,

I'm trying to configuring a setup where I will have 1 DELL PE1950 with 2 QC Xeon 5335, 8GB ram and a HP DL380G3 with 2 Xeon 3GHz and 2GB ram and Xen OSS or XenExpress v4, hosting RHEL4 and Windows VMs.

The problem is on the storage side. Since I'm really low on budget, I've to skip fiber channel and go for one of this two reasonable iSCSI options:

1)
SAN solution:  with a DELL/EMC2 AX150 iSCSI, single controller

2)
NAS solution: another server, a PE2950 configured with 2 QC Xeon 5320, 8GB ram and Xeon OSS or XenExpress v4 again, acting as a iSCSI target for himself and the other server. It will host also a LTO2 backup library, probably DELL PV124T


What are the real performance benefits of the SAN in this case? The SAN was intended to be not entirely dedicated to XEN. If I go for a server based SAN, it will (directly or via a VM) provide storage via NFS/SAMBA to other hosts

Well, of course, you may have also option (3) and (4)... that probably I missed... any help is appreciated

thank you in advance

        ivan





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