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OceanStor UltraPath for vSphere 21.3.0 User Guide 03

This document covers the functions, features, installation, configuration, upgrade, uninstallation, maintenance, troubleshooting, and FAQs of OceanStor UltraPath for vSphere (UltraPath forvSphere). UltraPath for vSphere is the multipathing software developed by HuaweiTechnologies Co., Ltd (Huawei for short). The document aims at helping users to be fully familiar with UltraPath for vSphere and its use.
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Querying I/O Latency Information

Querying I/O Latency Information

Function

The show iolatency command is used to query the latest I/O latency, max I/O latency, and average I/O latency of all virtual LUNs or on the logical paths of the specific virtual LUNs.

Format

show iolatency [ -l vlun-id ]

Parameters

Parameter

Description

Default Value

-l vlun-id

ID of a virtual LUN

If you run show vlun without specifying any parameters, all virtual LUN IDs can be obtained.

You can run show iolatency with this parameter to query the I/O latency on the logical paths of these virtual LUNs.

NOTE:

You can query a maximum of eight virtual LUNs at a time. Use commas (,) to separate IDs of the virtual LUNs.

None

Level

User root

Usage Guidelines

  • Run show iolatency to obtain the I/O latency information of all virtual LUNs.
  • Run show iolatency -l vlun-id to query the I/O count information on the logical paths of the specified virtual LUNs.

Example

  • Query the I/O latency information of all virtual LUNs.
    ~ # esxcli upadm show iolatency 
    ----------------------------------------------------------------------------------- 
     Vlun ID    Disk Name     Latest I/O Latency  Max I/O Latency  Average I/O Latency  
        0     LUN002_dcd0000          0                 11                  0           
        1     LUN002_dcd0001          0                  9                  0           
        2     LUN002_dcd0002          0                 11                  0           
        3     LUN002_dcd0003          0                  9                  0           
        4     LUN002_dcd0004          0                 11                  0           
        5     LUN002_dcd0005          0                 11                  0           
        6     LUN002_dcd0006          0                 11                  0           
        7     LUN002_dcd0007          0                 502                 0           
    -----------------------------------------------------------------------------------
  • Query the I/O latency information on the logical paths of the specific virtual LUNs.
    ~ # esxcli upadm show iolatency -l 0 
    ------------------------------------------------------------------------------------------ 
     Vlun ID    Disk Name     Path ID  Latest I/O Latency  Max I/O Latency  Average I/O Latency  
        0     LUN002_dcd0000     0             0                 11                  0           
    ------------------------------------------------------------------------------------------

System Response

None

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Updated: 2019-06-29

Document ID: EDOC1100052672

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