A1000

2007-12-25 0:35:00

I am struggling with the following problem. See if you
have time to throw some light.

I create 2 lun in a1000 with the following command.
raidutil -c c1t5d0 n 0 -l 1 -s 0 -g 10,20 (Raid 0)
raidutil -c c1t5d1 n 1 -l 5 -s 0 -g 11,21,12,22,13,23
(Raid 1)

I tried to benchmark the performance by running

iostat -xnp 20 | grep c1t5d0s3 for the command
time dd if=exp_IS1_schema_1.dmp of=/dev/null bs=1024
it gives the following output
35.0 0.0 3777.6 0.0 0.0 1.7 0.0 49.7 0
96 c1t5d1s5
32.2 0.0 3943.6 0.0 0.0 1.9 0.0 58.7
0
100 c1t5d1s5

The svc_t(58.7 and 49.7) very high and read rate 3943 is
also very low.
I have enabled both read and write cache but the result
is still same.

Is there any tuning available. Can we change any
parameter to improve performance.

Thanks
Biprasish Chaudhury (bchaudhury at tucows.com)
Network Operations
Tucows International Corp.
416-535-0123 x1611

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