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2021
How do I get statistics for our HBAs?
How do I get statistics for our HBAs?
We are using PowerPath 5.5 on 64-bit RHEL 5.6 (kernel 2.6.18-238.5.1.el5) with QLogic 2460 HBAs.
Using:
powermt display
only reports:
Symmetrix logical device count=0
CLARiiON logical device count=2
Hitachi logical device count=0
HP xp logical device count=0
Ess logical device count=0
Invista logical device count=0
==============================================================================
----- Host Bus Adapters --------- ------ I/O Paths ----- ------ Stats ------
### HW Path Summary Total Dead IO/Sec Q-IOs Errors
==============================================================================
1 qla2xxx optimal 4 0 - 0 0
2 qla2xxx optimal 4 0 - 0 0
Why are the Stats not accounted for?
Is there any method by which I can get throughput and latency for the HBAs?
TIA
dynamox
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May 18th, 2012 10:00
io size depends on what your application is doing, probably need to look on the array side.
richa031
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May 18th, 2012 10:00
Thanks for the response - powermt display every=10 does give me IO/Sec after the first sample.
How does this equate to throughput or latency?
Is the IO a Linux IO (512-byte) or a standard FC IO (I think 2048 bytes)?
I'm trying to determine the load on these HBAs...
dynamox
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May 18th, 2012 10:00
you can try "powermt display dev=all every=10" ..or powermt display every=10"
richa031
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May 18th, 2012 11:00
Very fast SAN
- too much for this environment at the current time.
Looking at potentially removing this DB from this SAN - to what type of storage is the question.
That's why I'm trying to get these stats...
Thanks to your help, this seems to work very well:
powermt display every=5 | grep qla | awk '{now=strftime("%d-%b-%Y,%T"); print now " " $0}'
richa031
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May 18th, 2012 11:00
Thanks.
This is an Oracle DB using ASM.
I would expect the latency to be near 0 (on the order of ~2ms) if the Q-IOs are near or at 0, correct?
dynamox
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May 18th, 2012 11:00
to me latency = response time , 2ms is awesome