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

  • To: Christian Zoffoli <czoffoli@xxxxxxxxxxx>
  • From: Rudi Ahlers <Rudi@xxxxxxxxxxx>
  • Date: Wed, 26 Jan 2011 16:50:02 +0200
  • Cc: "xen-users@xxxxxxxxxxxxxxxxxxx" <xen-users@xxxxxxxxxxxxxxxxxxx>
  • Delivery-date: Wed, 26 Jan 2011 06:52:51 -0800
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On Wed, Jan 26, 2011 at 4:42 PM, Christian Zoffoli <czoffoli@xxxxxxxxxxx> wrote:
> Il 26/01/2011 11:44, Rudi Ahlers ha scritto:
> [cut]
>> So, what other options do we have, which is not slow?
> to increase performances you can skip iscsi and you can try a SAS SAN
> (with some LSI SAS switch if you need more than 4 servers linked to a
> single SAN)

Do you get different types of SAN? SAN = iSCSI, last time I checked.

> actually you can have a large amount of power inside a server chassis so
> ...the problem is only I/O and sometimes one storage cannot handle more
> than 2/3 servers
> [cut]
>> But this soon becomes very expensive, often beyond the point of making
>> a decent profit out of the setup without charging the clients so much
>> that they'll rather go elsewhere. And in many cases it means new NAS
>> and SAN equipment as well since not all of them support infiniband
> infiniband is not so expensive ...if you move ~ all to infiniband is
> very cost effective but you have to invest a large amount of time.

It depends where you are, in our country it's exuberantly expensive.

> Christian
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Kind Regards
Rudi Ahlers

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