Maybe it is a little late to be posting on this thread - but I was doing pgbench runs with a Raid 0 ATA system and thought the results might be interesting.

So here they are : pgbench -c 5 -t 1000 -s 5, median of 3 runs on a
Dual PIII 700 512Mb 2x7200 RPM ATA 133  Promise TX200
(same method / Pg configuration parameters as Scott's):

2 disk Raid0 W0
66 tps

2 disk Raid0 W1
220 tps

I was expecting a slightly better result for W0 (write caching off), mind you the point could be made that you get about half the performance of the SCSI system - for about half the price.

And the W1 result - that's fast, when (or if) that little power saving capacitor arrives for these drives we could see performance, reliability *and* economy....

regards

Mark

scott.marlowe wrote:


MachineA Config1: 141 tps

MachineB Config1 W0:
60 tps

MachineB Config1 W1:
112 tps

MachineA Config2:
101 tps

MachineB Config2 W0:
44 tps

MachineB Config2 W1:
135 tps







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