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SmartQoS Feature Guide
OceanStor Dorado V3 Series V300R001

This document is applicable to OceanStor Dorado5000 V3, Dorado6000 V3, and Dorado18000 V3. It describes the implementation principles and application scenarios of the SmartQoS feature, and explains how to configure and manage SmartQoS.

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Viewing I/O Priorities

Viewing I/O Priorities

This operation enables you to view I/O priorities of LUNs or snapshots.

Prerequisites

At least one LUN or snapshot has been created.

Context

  • When you create a LUN, specify an I/O priority for the LUN. If the I/O priority is not specified, the LUN will be granted the low priority by default
  • The created snapshot will be granted the low priority by default.
  • If a LUN or snapshot is created, its I/O priority can be manually changed.

Procedure

  1. Log in to DeviceManager.
  2. Choose Provisioning > Resource Performance Tuning > SmartQoS.
  3. Click the Priority Control tab.
  4. Select LUN or Snapshot in Application Type drop-down list box. View the I/O priorities information. Table 3-1 and Table 3-2 describe related parameters.

    Table 3-1 LUN parameters

    Parameter

    Description

    Setting

    I/O Priority

    Priority control of a LUN

    [Example]

    Low

    LUN Name

    Name of a LUN.

    [Example]

    lun001

    IDa

    ID of a LUN.

    [Example]

    1

    Health Status

    Indicates whether a LUN is normal.

    [Example]

    Normal

    Running Status

    Running status of a LUN.

    [Example]

    Online

    Type

    Type of a LUN.

    [Example]

    thin LUN

    Capacity

    Capacity of a LUN.

    [Example]

    1 GB

    Owning Storage Pool

    Storage pool to which a LUN belongs.

    [Example]

    storagepool1

    Mapping

    Mapping status of a LUN.

    [Example]

    Unmapped

    a: This parameter is not displayed on the GUI by default. You can click on the right side and select this parameter to view its value.

    Table 3-2 Snapshot parameters

    Parameter

    Description

    Setting

    I/O Priority

    I/O priorities of the snapshot.

    [Example]

    Low

    Name

    Name of a snapshot.

    [Value range]

    • The name must be unique.
    • The name contains letters, digits, underscores (_), periods (.), and hyphens (-).
    • The name contains 1 to 31 characters.

    [Example]

    Snapshot001

    IDa

    ID of a snapshot.

    [Example]

    11

    Health Status

    Indicates whether a snapshot is normal. The possible value can be Normal or Fault.

    [Example]

    Normal

    Running Status

    Indicates whether a snapshot is working properly. The possible value can be Activated, Restore, or Inactive.

    [Example]

    Activated

    Source LUN Name

    Name of the source LUN of a snapshot.

    Source LUN is a LUN where source data resides.

    [Example]

    lun005

    Source LUN IDa

    ID of the source LUN of a snapshot.

    [Example]

    1

    Snapshot Capacity

    Capacity of a snapshot.

    [Example]

    1.000 MB

    Allocated Capacity

    Storage pool capacity allocated to a snapshot. After a snapshot is activated, the data capacity and metadata capacity allocated to the write snapshot exclude the data protection capacity of the source LUN. The metadata capacity is about 1% of the data capacity.

    [Example]

    128.000 MB

    Activated At

    Time when a snapshot is activated.

    [Example]

    2017-07-03 14:12:25 UTC+08:00

    Mapping

    Indicates whether a snapshot is mapped to a mapping view. The possible value can be Mapped or Unmapped.

    [Example]

    Unmapped

    WWNa

    WWN of a snapshot.

    [Example]

    010235G6LLZ0B8xxxxxx

    Rollback Start Timea

    Time when a snapshot rollback starts.

    [Example]

    2014-05-30 10:15:45 UTC+08:00

    Rollback End Timea

    Time when a snapshot rollback ends.

    [Example]

    2014-05-30 10:15:45 UTC+08:00

    Rollback Progressa

    Progress of a snapshot rollback.

    [Example]

    50

    Rollback Speeda

    Snapshot rollback speed, including Low, Medium, High, and Highest.

    • When the service load on the storage system is heavy, set the rollback speed to Low or Medium.
    • When the service load on the storage system is light, set the rollback speed to High or Highest.

    [Example]

    High

    a: This parameter is not displayed on the GUI by default. You can click on the right side and select this parameter to view its value.

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Updated: 2018-10-19

Document ID: EDOC1000178797

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