How do I get statistics for our HBAs?

[richa031]

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]

you can try "powermt display dev=all every=10"  ..or powermt display every=10"

[richa031]

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]

io size depends on what your application is doing, probably need to look on the array side.

[richa031]

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]

to me latency = response time , 2ms is awesome

[richa031]

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}'