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Advanced O&M Command Reference

OceanStor 5000, 5000F, 6000, and 6000F V5 Series V500R007

This document is applicable to OceanStor 5110 V5, 5110F V5, 5300 V5, 5500 V5, 5600 V5, 5800 V5, 6800 V5, 5300F V5, 5500F V5, 5600F V5, 5800F V5, and 6800F V5. Based on the CLI, this document describes how to use various commands classified by functionsand how to set the CLI and manage the storage system through these commands.
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change disk schedule_work_status

change disk schedule_work_status

Function

The change disk schedule_work_status command is used to set the I/O scheduling mode of a specific type of disks.

Format

change disk schedule_work_status work_status=? { scenario=? | medium_type=? } *

Parameters

Parameter

Description

Value

medium_type=?

Disk type.

The value can be:

"fc", "sas", "sata", "ssd", "nl_sas", "slc_ssd", or "mlc_ssd".

scenario=?

Application scenario.

The value is "smr".

work_status=?

Working mode of the scheduler.

The value can be:

"normal" or "read_first".

Views

Developer view

Usage Guidelines

Change the I/O scheduling mode of disks based on disk performance requirements.

Example

  • Set the I/O scheduling mode of all SAS disks whose application scenario is SMR to read first.
    developer:/>change disk scheduler_work_status medium_type=sas scenario=smr work_status=read_first 
    DANGER: You are about to change the I/O scheduling mode of disks. This operation may cause system abnormalities. 
    Suggestion: Note the following before and after the command execution: 
    1. Ensure that the command is to be executed by the R&D personnel. 
    2. This command changes the I/O scheduling mode of disks, which may deteriorate system read and write performance. 
    3. After executing this command, check whether the service system is running correctly.  
    Have you read danger alert message carefully?(y/n)y 
      
    Are you sure you really want to perform the operation?(y/n)y 
    Command executed successfully.
  • Set the I/O scheduling mode of all SAS disks to read first.
    developer:/>change disk scheduler_work_status medium_type=sas work_status=read_first 
    DANGER: You are about to change the I/O scheduling mode of disks. This operation may cause system abnormalities. 
    Suggestion: Note the following before and after the command execution: 
    1. Ensure that the command is to be executed by the R&D personnel. 
    2. This command changes the I/O scheduling mode of disks, which may deteriorate system read and write performance. 
    3. After executing this command, check whether the service system is running correctly.  
    Have you read danger alert message carefully?(y/n)y 
      
    Are you sure you really want to perform the operation?(y/n)y 
    Command executed successfully.
  • Set the I/O scheduling mode of all disks whose application scenario is SMR to read first.
    developer:/>change disk scheduler_work_status scenario=smr work_status=read_first 
    DANGER: You are about to change the I/O scheduling mode of disks. This operation may cause system abnormalities. 
    Suggestion: Note the following before and after the command execution: 
    1. Ensure that the command is to be executed by the R&D personnel. 
    2. This command changes the I/O scheduling mode of disks, which may deteriorate system read and write performance. 
    3. After executing this command, check whether the service system is running correctly.  
    Have you read danger alert message carefully?(y/n)y 
      
    Are you sure you really want to perform the operation?(y/n)y 
    Command executed successfully.

System Response

None

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Updated: 2019-07-11

Document ID: EDOC1000181619

Views: 615104

Downloads: 244

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