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

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] iscsi vs nfs for xen VMs
From: Marcin Kuk <marcin.kuk@xxxxxxxxx>
Date: Fri, 28 Jan 2011 11:02:15 +0100
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2011/1/28 Rudi Ahlers <Rudi@xxxxxxxxxxx>:
> 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.

I think you are right... today :).

>> --
>> 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.


Marcin Kuk

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