How to check latency on the Alletra 9000 series from the command line

[hkane]

Hi

Is there a way to output latency information for a currently running Alletra 9000 series system?

If so, what command should I use?

Regards.

[Jamie309Perez]

Hello,

Yes, you can check latency on an HPE Alletra 9000 using the command-line interface. The most direct command is statvv, which provides real-time performance statistics, including I/O operations and latency, for your Virtual Volumes. For historical data, you can use the histvv command, which allows you to specify a time range to review past performance metrics. 

[hkane]

Hi Jamie309Perez

Thank you for your response.

I ran the statvv command, but which value is the latency? It output IOPS, KB/s, Svt ms, and IOSz KB. Does the Svt ms value represent latency?

Regards,

[Cali]

Yes

[Ramesh_Kumar_P]

@hkane,

From the above notes, I see your queries has been addressed. Please let us know, if you need further information.

Looking forward to your response.

Thank you!

[Ramesh_Kumar_P]

From the case history, the required information has been shared with the customer.

I presume, there is no outstanding questions from the customer, as there is no response from the customer when follow up.

Hence, closing the case for now.

The customer may feel free to log a new community case for any further assistance.

Thank you!

[hkane]

Hi @Ramesh_Kumar_P,

Thank you for your answer.
I understand that service time is latency.
One more thing I'd like to confirm: What is the difference between the service time values output by the statvv and statvlun commands?
Since statvlun outputs service time for each port, is it correct to understand that this is the communication latency of the FC/iSCSI protocol?

Regards.