[rescue] playing with the new E250 ... disk performance vs. old PeeCee
magnus at yonderway.com
Thu Dec 21 09:33:45 CST 2006
> Do the low direct disk read numbers for the Sun box surprise anyone? Am
> I hitting a limitation of the SCSI controller here? I'm not too
> familiar with the E250 platform yet and I was thinking maybe it had a
> faster SCSI controller than that. Looks more like it maxes out at 20MB/sec.
OK more info... Ubuntu 6.06LTS "dapper" on an E250 is a wee bit broken.
I'm running spot's distro, Aurora 2.0 now. Much more better!
target0:0:0: FAST-20 WIDE SCSI 40.0 MB/s ST (50 ns, offset 16)
target0:0:0: FAST-20 SCSI 20.0 MB/s ST (50 ns, offset 16)
Timing O_DIRECT cached reads: 920 MB in 2.00 seconds = 459.97 MB/sec
Timing O_DIRECT disk reads: 50 MB in 3.00 seconds = 16.64 MB/sec
Timing O_DIRECT cached reads: 896 MB in 2.00 seconds = 448.87 MB/sec
Timing O_DIRECT disk reads: 88 MB in 3.03 seconds = 29.02 MB/sec
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