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Re: [Xen-users] iscsi vs nfs for xen VMs

To: Simon Hobson <linux@xxxxxxxxxxxxxxxx>
Subject: Re: [Xen-users] iscsi vs nfs for xen VMs
From: Rudi Ahlers <Rudi@xxxxxxxxxxx>
Date: Fri, 28 Jan 2011 11:38:19 +0200
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On Fri, Jan 28, 2011 at 10:54 AM, Simon Hobson <linux@xxxxxxxxxxxxxxxx> wrote:
> Marcin Kuk wrote:
>>  > So SAN = iSCSI isn't quite it.
>> Never ending story...
>> This is only terminology - you can talk about it all the time, but the
>> question is... who cares? ;) Any of you will win - all this is named
>> by people, and tomorow all can have different meanings.
> Indeed, but the main thing people overlook is that they are different things
> - as in the analogous statement that "car != Ford".
> So for anyone who hasn't realised it yet :
> SAN = Storage Area Network, rally just a name for any technique that makes
> your storage 'remote' (as in not 'built in') from the server/device that's
> using it. It really does not require any specific technology though some
> things are assumed (such as the ability to connect more than one device to
> the storage and share the capacity).
> iSCSI = one specific technology for achieving that.
> Analogy :
> Car - wheeled and powered machine for moving people and goods about.
> Ford - just one of many brands you can buy.
> --
> Simon Hobson

True, but for quite some time SAN is associated with iSCSI & NAS with NFS.

And I agree with you SAN = Storage Area Network, so in fact 2 NAS
boxes would be a SAN since it's storage on the network. I think a lot
of the confusion is with the marketing, and what the corporate would
like us to use. It's nor always what we actually wanted, but we can't
say much cause it costs so damn much. And, sadly, clients associated
expensive equipment with quality, which is not always the case either.

Kind Regards
Rudi Ahlers

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