RE: AW: [Xen-users] Best way to use iSCSI in domU

El lun, 22-06-2009 a las 00:32 -0700, Nathan Eisenberg escribió:
> Interesting.  I'd stand back and look at your existing setup before trying to 
> rebuild with some other storage tech.
> 
> In my experience, poor NFS performance is almost always due to 
> misconfigurations (not your fault - NFS is suprisingly low level and can be 
> very confusing at times).  I have several very large NFS deployments that 
> have absolutely fantastic performance.  NFS is probably already a proven 
> technology for whatever you're doing.
> 
> The number one thing to do is ensure that you have NFS mounted without the 
> synchronization option turned on.  There's also buffer sizes to be calculated 
> and set.  If these are web servers, there is also an Apache directive 
> regarding kernel caching of files; essentially, you can end up double caching 
> files without the directive in place.
> 
        We've done a lot of tests and checks. NFS performance is poor for what
we need in this particular case (we are using it in other scenarios
without any problem).

-- 
Angel L. Mateo Martínez
Sección de Telemática
Área de Tecnologías de la Información       _o)
y las Comunicaciones Aplicadas (ATICA)      / \\
http://www.um.es/atica                    _(___V
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Fax: 868888337


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