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Old 10-23-06, 01:04 PM   #5
fhj52
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Join Date: Jan 2005
Posts: 135
Default Re: What is the NVRAID stripe size?

I ran the test on 16GB file last night.
iozone -az -i0 -i1 -S 2048 -s 16G -Rb /tmp/iozone-NVRAID_JFS=16Gfile_test.xls

SAME ISSUE!!
snippet:
( As before, the top row is records sizes(kB), the left column is file size(kB) & data is kB/s. )
Code:
              KB  reclen   write rewrite    read    reread
        16777216      64  120538  124312   113072   113078
        16777216     128  120785  124258    26397    86069
        16777216     256  120480  124435    27605     98806
        16777216     512  119004  123088    28583    105943
        16777216    1024  121796  119224    28473    105762
        16777216    2048  118820  124570    28094    105703
        16777216    4096  119912  123650    28241    105788
        16777216    8192  120574  115020    28222    105759
        16777216   16384  120712  120662    28378    105818
So what is going on here to cause that?
Since this is same problem with ATA it must not be stripe size or anything related to NVRAID directly.
And since the SCSI controller does not exhibit such huge dropoff, it appears that the NVIDIA nv2200 controller is the problem.

WHY is it apparently failing?


Thanks!
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Last edited by fhj52; 10-23-06 at 01:23 PM.
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