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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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Setting I/O Retry Timeout

Setting I/O Retry Timeout

Function

The set maxioretrytimeout command is used to set the timeout period for I/O retry on UltraPath for ESXi.

Format

set maxioretrytimeout -t time [-a array-id | -l vlun-id ]

Parameters

Keyword and Parameter

Description

Default Value

-t time

Timeout period for I/O retry on UltraPath for ESXi.

The value ranges from 1 to 2,592,000, expressed in seconds.

1800

-a array-id

ID of a storage system.

You can run show diskarray without an ID to display all storage system IDs.

None

-l vlun-id

ID of a virtual LUN.

You can run show vlun without an ID to display all virtual LUN IDs.

None

Level

User root

Usage Guidelines

  • Run set maxioretrytimeout -t time to set the I/O retry timeout of all storage systems.
  • Run set maxioretrytimeout -t time -a array-id to set the I/O retry timeout of a specified storage system.
  • Run set maxioretrytimeout -t time -l vlun-id to set the I/O retry timeout of a specified virtual LUN.
NOTE:

In some cases, I/Os are not successfully processed (for example, due to fully-loaded HBAs) even if no clear faults occur on paths. UltraPath for ESXi will retry to avoid I/O failure. However, if the I/Os are not returned for a long time, the impact on some upper-layer applications may be worse than an I/O failure. In this case, you can set the timeout period for I/O retry to prevent such an impact.

Example

Set the timeout period for I/O retry on UltraPath for ESXi to 1800 seconds.

~ # esxcli upadm set maxioretrytimeout -t 1800  
Succeeded in executing the command.

System Response

None

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Updated: 2019-06-29

Document ID: EDOC1100052672

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