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Re: [Xen-users] Re: domU has better I/O performance than dom0?
| To: | Troels Arvin <troels@xxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-users] Re: domU has better I/O performance than dom0? |
| From: | Stefan de Konink <skinkie@xxxxxxxxx> |
| Date: | Wed, 28 Nov 2007 13:44:37 +0100 (CET) |
| Cc: | xen-users@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Wed, 28 Nov 2007 04:45:35 -0800 |
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On Wed, 28 Nov 2007, Troels Arvin wrote: > On Wed, 28 Nov 2007 14:27:54 +0200, Johann Spies wrote: > > The commandline was > > > > /usr/sbin/bonnie -d . -s 0.130 -n 8096 -r 8096 > > You are measuring file creation rate, and not "raw I/O throughput", > right? In that sense, your tests are different from what I measured. > Still, your results are certainly strange. I wonder if they would be > equally strange if you ran them on different non-virtualized servers. I benchmarked iSCSI and NFS. You will notice the strangeness on NFS too: http://xen.bot.nu/benchmarks/virtueel.html Since NFS crashes my system if I do a benchmark that is larger than my memory I guess the benchmark is done in memory (initially). Since the FC results show better performance, could it be the offloading with multiple processors? Stefan _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users |
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