Re: [Xen-users] what do you recommend for cluster fs ??

[Ceri Storey <cez@xxxxxxxxxxxxxxxx>]

On Mon, Sep 25, 2006 at 09:52:19AM -0700, Tom Mornini wrote:
> On Sep 25, 2006, at 8:09 AM, Martin Hierling wrote:
> 
> >setup is easy (about 1h) but my test szenario was: P3-1GHz with  
> >Dom0 as iSCSI Target and 3 DomU as ocfs2 "clients" mounting the  
> >same FS over open-iscsi. That works out of the box but under heavy  
> >load the Clients get kicked by the heardbeat. That obviously was  
> >because the complete network was fuff of iscsi traffic (bonnie). I  
> >will test that in a real environment in about 2 weeks. will reoport  
> >here.

> You might get better performance and leave this problem behind with  
> AoE as it's much less demanding under very high loads.

I must admit that it sounds like you're running your frontend and
backend networks on the same LAN. 

It's probably wise to use a dedicated network for storage network
traffic, because as you've seen, it can quite easily saturate the link,
causing performance issues. 

It's also entirely possible that moving the storage onto a dedicated
network would bring security benefits, assuming you've taken proper
precautions (there's no need for it to have access / be accessible from
the internet). 
-- 
Ceri Storey <cez@xxxxxxxxxxxxxxxx>
'What I really want is "apt-get smite"' 
    --Rob Partington <http://rjp.frottage.org>

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