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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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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Setting a Load Balancing Mode

Setting a Load Balancing Mode

Function

The set loadbalancemode command is used to set a load balancing mode for UltraPath for ESXi.

Format

set loadbalancemode [ -a array-id | -l vlun-id ] -m mode

Parameters

Keyword and Parameter

Description

Default Value

-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

-m mode

Load balancing mode.

The value can be round-robin, min-queue-depth, or min-task.

  • round-robin: round-robin load balancing
  • min-queue-depth: minimum queue depth load balancing
  • min-task: minimum task load balancing

min-queue-depth

Level

User root

Usage Guidelines

Before resetting the load balancing mode, you are advised to run the show upconfig command to query the current load balancing mode. The load balancing modes are described as follows:

  • To set the load balancing mode to minimum task, run the set loadbalancemode -m round-robin command to set the load balancing mode to round-robin. When an application server delivers I/Os to a storage system, UltraPath for ESXi sends the first set of I/Os through path 1 and second set of I/Os through path 2, and so on. Paths are used in turn to ensure that each path is fully utilized. When an application server delivers I/Os to a storage system, the minimum I/O queue takes precedence over other queues in I/O sending.
  • To set the load balancing mode to minimum task, run the set loadbalancemode -m min-queue-depth command to set the load balancing policy to min-queuedepth. In this mode, UltraPath for ESXi calculates the number of waiting I/Os on each path in real time, and then delivers new I/Os to the path with the minimum waiting I/Os.
  • To set the load balancing mode to minimum task, run the set loadbalancemode -m min-task command to set the load balancing policy to min-task. In this mode, UltraPath for ESXi calculates the number of waiting I/Os on each path and the data block size of each I/O in real time. Then UltraPath for ESXi delivers new I/Os to the path with the lightest load. Before resetting the load balancing mode, you are advised to run the show upconfig command to query the current load balancing mode.

Example

Set the load balancing mode of the storage system whose ID is 0 to round-robin.

~ # esxcli upadm set loadbalancemode -a 0 -m round-robin 
Succeeded in executing the command.

System Response

None

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Updated: 2019-06-29

Document ID: EDOC1100052672

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