Hi All ,
Does anyone know how to get reliable data regarding disk I/O
throughput. I have a 2100 with RZ28M disks and a 4100 with RZ29B disks
both have kzpsc-ba controllers. I ran diskx on them overnight while
the system was quiet , and I am not real pleased with the returned
figures. Am I doing something amiss or is this to be expected.
EG : diskx -f /dev/re9c -o re9c.out -p -n -S ( 2100 with RZ28m disks )
Part- Transfer Count of Read Write Transfer
ition Size Transfers Rate Rate Errors
--------------------------------------------------------------------------------
c 2.0 KB 514048 2.06 MB/sec 279.83 KB/sec 0
c 8.0 KB 128512 2.07 MB/sec 280.39 KB/sec 0
c 14.0 KB 73435 2.08 MB/sec 281.22 KB/sec 0
c 20.0 KB 51404 1.04 MB/sec 281.92 KB/sec 0
c 26.0 KB 39542 1.11 MB/sec 281.85 KB/sec 0
c 32.0 KB 32128 2.04 MB/sec 281.08 KB/sec 0
c 38.0 KB 27055 1.53 MB/sec 279.71 KB/sec 0
c 44.0 KB 23365 1.47 MB/sec 280.12 KB/sec 0
c 50.0 KB 20561 1.41 MB/sec 282.51 KB/sec 0
c 56.0 KB 18358 1.14 MB/sec 281.97 KB/sec 0
c 64.0 KB 16064 1.17 MB/sec 280.63 KB/sec 0
EG : diskx -f /dev/re7g -o re7g.out -p -n -S ( 4100 with RZ29B disk )
Part- Transfer Count of Read Write Transfer
ition Size Transfers Rate Rate Errors
--------------------------------------------------------------------------------
g 2.0 KB 948005 2.22 MB/sec 635.05 KB/sec 0
g 8.0 KB 237001 577.13 KB/sec 634.67 KB/sec 0
g 14.0 KB 135429 1.58 MB/sec 634.40 KB/sec 0
g 20.0 KB 94800 1.27 MB/sec 634.45 KB/sec 0
g 26.0 KB 72923 520.61 KB/sec 634.88 KB/sec 0
g 32.0 KB 59250 2.21 MB/sec 634.31 KB/sec 0
g 38.0 KB 49895 872.97 KB/sec 634.58 KB/sec 0
g 44.0 KB 43091 509.75 KB/sec 634.81 KB/sec 0
g 50.0 KB 37920 2.23 MB/sec 634.72 KB/sec 0
g 56.0 KB 33857 588.76 KB/sec 634.35 KB/sec 0
g 64.0 KB 29625 501.07 KB/sec 634.92 KB/sec 0
Thanking you ,
Gary Menna E-Mail g.menna_at_isu.usyd.edu.au
Info Tech Services Phone +61 2 9351-6360
University of Sydney (G05) Fax +61 2 9351-7711
************************************************************************
We all enter this world in the same way: naked, screaming, and soaked in
blood. But if you live your life right, that kind of thing doesn't have
to stop there. -- Dana Gould
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Received on Mon Jul 07 1997 - 04:16:38 NZST