Re: Linux disk performance.

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On 12/22/06, Bhanu Kalyan Chetlapalli <chbhanukalyan@xxxxxxxxx> wrote:
>
> Thanks  for the suggestion but the performance was terrible when write
> cache was disabled.

Performance degradation is expected. But the point is - did the
anomaly, that you have pointed out, go away? Because if it did, then
it is the disk cache which is causing the issue, and you will have to
live with it. Else you will have to look elsewhere.

oops, sorry for incomplete answer.
Actually i did not tested thoroughly but my initial tests showed some
bumps and serious performance degradation. But anyway there was still
some bumps... :(

(sequence)(channel)(write time in microseconds)
0	       0	6366
0	       1	9949
0	       2	10125
0	       3	10165
0	       4	11043
0	       5	10129
0	       6	10089
0	       7	10165
0	       8	71572
0	       9	9882
0	       10	8105
0	       11	10085


--
---------------------------------------------------------------
regards
Manish Regmi

---------------------------------------------------------------
UNIX without a C Compiler is like eating Spaghetti with your mouth
sewn shut. It just doesn't make sense.

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