RE: [Xen-users] Aoe or iScsi???

["James Harper" <james.harper@xxxxxxxxxxxxxxxx>]

> Hi people...
> 
> Here we use Xen 4 with Debian Lenny... We're using kernel 2.6.31.13
> pvops...
> As a storage system, we use AoE devices...
> So, we installed VM's on AoE partition... The "NAS" server is a Intel
> based baremetal with SATA hard disc...
> 
> However, sometime I feeling that VM's is so slow...
> 
> Also, all VM has GPLPV drivers installed...
> 
> So, I am thing about change AoE to iSCSCI...
> 
> However, I have many doubt with this procedure... Is it iSCSI better
> than AoE???
> 

Over a single 'server' class network interface, iSCSI is probably better than 
AoE due to the TCP offload functions found in such adapters.

If you are using the reference 'vblade' implementation of the AoE server then 
it is definitely known to suck performance-wise (see list archives for a 
discussion).

I think the only way to be sure in your case is to set up iSCSI and AoE and run 
some performance tests yourself. We can argue the theoretical benefits of each 
on the list as much as we like, but the only way to be sure for yourself is to 
do some testing for yourself :)

James

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