Hi,

I made some benchmarks with dbench on linux/KVM.

IDE means I use an image disk with "-hda"
SCSI means I use an image disk with "-sda"
(see the patch I proposed on qemu list:
http://www.mail-archive.com/[EMAIL PROTECTED]/msg08679.html )

threads KVM-21  KVM-21  KVM-24  KVM-24  KVM-25  KVM-25
        IDE     SCSI    IDE     SCSI    IDE     SCSI

1       215.272 94.8775 318.626 319.533 307.111 331.757
2       212.061 91.3193 313.217 315.163 314.577 323.715
4       197.586 81.7551 291.752 276.044 292.084 271.191
8       144.814 58.5725 188.819 198.995 168.273 165.564
16      111.505 66.3605 139.824 157.617 150.822 123.671
32      43.4109 15.7386 48.2109 50.4114 59.1074 69.5717
64      21.0567 8.3535  11.3457 19.9483 20.4877 24.5627

        results are in MB/sec

Conclusion:

KVM-25 is really better than KVM-21
in most cases, SCSI is better than IDE

Cheers,
Laurent
-- 
------------- [EMAIL PROTECTED]  --------------
       "Any sufficiently advanced technology is
  indistinguishable from magic." - Arthur C. Clarke

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