Re: Performance

[Mukul Kotwani <mkotwani@yahoo.com>]

Running IOMeter against the Qlogic with IBM 15kRPM
JBODS, Im getting:

1) For 512 byte 100%random reads, I get *just* 260 
IOPs per sec.On Windows with IOMeter, I get about 7000
foir the same config.


2) For 512k 100%sequential reads, I see 30MB per sec.
Windows gives 85MB/sec

I see the similar performance with my driver on Linux.
I dont know whyit is so low, cannot be that low as
compared to windws, a few MB/sec or a few hundred IOPs
per sec difference is OK, but this difference is TOO
huge. I tried a bunch of diff host template params,
but doesnt seem to make a difference.

Has anyone dont any testing with IOMeter? Or is there
any other toold I can use to test IOPs/througput?


Thanks,
Mukul

--- Craig Tierney <ctierney@hpti.com> wrote:
> For the Qlogic 2200F I am able to push 100 MB/s for
> reads and writes using multiple threads to a
> filesystem
> that is striped across mutliple host ports on the
> SAN.  Backend RAID is a 
> Data Direct Networks SAN.  For a single thread to a
> ext3 filesystem
> and 2.4.18, I get about 70 MB/s for reads and
> writes.
> 
> I have no Iops/sec numbers.
> 
> Craig
> 
> 
> > Hello!
> > Does anyone have any performace numbers of a
> Qlogic
> > HBA? No of IOps/sec Max MBs /sec?
> > 
> > Thanks!
> > M
> > 
> > 
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> -- 
> Craig Tierney (ctierney@hpti.com)
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