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SmartQoS Feature Guide for File

OceanStor Dorado V3 Series V300R002

This document is applicable to OceanStor Dorado5000 V3, Dorado6000 V3, and Dorado18000 V3. It describes the implementation principles and application scenarios of the SmartQoS (for file) feature, and explains how to configure and manage SmartQoS.
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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).
Configuring I/O Priorities

Configuring I/O Priorities

The I/O priority of a file system is determined by the importance of applications processed by the file system. There are three I/O priorities available: high, medium, and low.


At least one file system has been created.


  • A newly created file system is granted the low priority by default.
  • After a file system is created, its I/O priority can be manually changed.


  1. Choose Provisioning > Resource Performance Tuning > SmartQoS.
  2. Click the Priority Control tab.
  3. Select File System from the Resource Type drop-down list.
  4. Select the file system you want to modify.
  5. Click Modify I/O Priority.

    The Modify I/O Priority dialog box is displayed.

  6. Select a proper I/O priority.

    The system supports three I/O priorities: Low, Medium, and High. A file system with a high priority can obtain system resources preferentially. You can set different values for specific file systems based on service priorities, ensuring critical service performance.

  7. Confirm the I/O priority setting.

    1. Click OK.

      The Warning dialog box is displayed.

    2. Confirm the information in the dialog box, select I have read and understand the consequences associated with performing this operation, and click OK.

      The Execution Result dialog box is displayed, indicating that the operation succeeded.

    3. Click Close.

Updated: 2019-02-22

Document ID: EDOC1100067330

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