RE: [Xen-devel] MYSQL bechmark results on XEN and NFS

["Neugebauer, Rolf" <rolf.neugebauer@xxxxxxxxx>]

Also, for the baseline, do you limit the amount of memory linux gets to
512MB or are you using the full 2GB?
Rolf

> -----Original Message-----
> From: xen-devel-admin@xxxxxxxxxxxxxxxxxxxxx [mailto:xen-devel-
> admin@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of Ian Pratt
> Sent: 24 January 2005 23:22
> To: jessie smart; xen-devel@xxxxxxxxxxxxxxxxxxxxx
> Subject: RE: [Xen-devel] MYSQL bechmark results on XEN and NFS
> 
> > I am trying to setup mysql on XEN.  I need to set it up on
> > NFS so I can migrate the domain when needed.
> 
> I'd use GNBD rather than NFS in situations where performance matters.
> 
> Also, you should be using 2.0-testing for benchmarking purposes until
we
> push out 2.0.4, as the default kernel config had debugging turned on
in
> 2.0.1-3.
> 
> Ian
> 
> >
> >
> > I am getting unexpected results and wanted to get some feedback.
> >
> >
> >
> > Here is my setup:
> >
> >
> >
> > 1.  NFS server
> >
> > Dual 2.0 Ghz  AMD Opteron
> >
> > 2GB of RAM
> >
> > Broadcom GB NIC
> >
> > Standard Fedora Core 3 (FC3)
> >
> > Mysql w/tpc-c medium databases on the NFS share
> >
> > XenU filesystem on the NFS share
> >
> >
> >
> > 2.  Xen machine
> >
> > Dual 2.0 Ghz  AMD Opteron
> >
> > 2GB of RAM
> >
> > Broadcom GB NIC
> >
> > FC3 w/XEN kernel patch
> >
> > Dom0 = 512MB RAM
> >
> > DomU = 512MB RAM
> >
> >
> >
> > 3.  TPC-C client
> >
> > PIII 2.0 Ghz
> >
> > 512 MB RAM
> >
> > Standard Fedora Core 2
> >
> > TCP-C client
> >
> >
> >
> > Results using the tpc-c benchmark:
> >
> > Baseline ~3300 new-ops per second
> >
> >             Machine 2 booted to the standard FC3
> >
> > Xen0 ~ 1700 new-ops per second
> >
> >             Machine 2 booted to Xen kernel with 512MB of RAM
> >
> > XenU ~500 new ops per second
> >
> >             Machine 2 booted to Xen kernel with 512MB of RAM
> >
> >             DomU booted from NFS share with 512MB of RAM
> >
> >
> >
> > Am I missing something here or is that much degradation
> > expected when booting a virtual machine over NFS.
> >
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> 
> 
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