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Basic Storage Service Configuration Guide for Block

OceanStor Dorado V3 Series V300R002

This document is applicable to OceanStor Dorado3000 V3, Dorado5000 V3, Dorado6000 V3, and Dorado18000 V3. It describes the basic storage services and explains how to configure and manage them.
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Creating a LUN (Applicable to V300R002C00)

Creating a LUN (Applicable to V300R002C00)

After creating a storage pool, you must create LUNs in it and map the LUNs to hosts. This allows the hosts to use the storage resources provided by the storage pool.

Prerequisites

  • A storage pool has been created.
  • You are an administrator or super administrator.

Context

  • The LUNs created by the storage system are thin LUNs, which are logical disks accessible to hosts. The system dynamically allocates storage resources to a thin LUN on demand within the capacity configured for the thin LUN.
  • Before creating a LUN, handle any existing Storage Pool Capacity Is About To Be Used Up alarms.
  • The total capacity configured for all LUNs in a storage pool can exceed the actual capacity of this storage pool. If the Storage Pool Capacity Is Used Up alarm is reported, expand the storage pool as soon as possible.
  • A Protocol Endpoint (PE) LUN does not provide storage space. Therefore, it cannot be allocated any capacity.
  • You can only configure the owning controller of a PE LUN in its advanced properties.

Procedure

  1. Choose Provisioning > LUN.
  2. Click Create.

    The Create LUN dialog box is displayed.

  3. Set basic properties for the LUN.

    Table 4-7 describes the related parameters.

    Table 4-7 LUN parameters

    Parameter

    Description

    Setting

    Name

    Name of a LUN.

    [Value range]

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

    [Example]

    LUN001

    Description

    Description of a LUN.

    [Example]

    -

    Application Type

    Application type of the LUN.

    The following preset application types are provided for typical applications: Default, Oracle_OLTP, Oracle_OLAP, Oracle_OLAP&OLTP, SQL_Server_OLAP, SQL_Server_OLTP, SQL_Server_OLAP&OLTP, SAP_HANA, VMware_VDI, Hyper-V_VDI, and FusionAccess_VDI.

    NOTE:
    • For these preset application types, Application Request Size, SmartCompression, and SmartDedupe have been configured. Before selecting a preset application type, ensure that SmartCompression and SmartDedupe licenses are available.
    • If SmartCompression and SmartDedupe licenses are not available, contact technical support to purchase licenses or click Add to add a new application type with SmartCompression and SmartDedupe disabled.
    • It is advised to select a preset application type preferentially if the application scenario matches one of the preset ones.
    • Once the application type is set for a LUN, it cannot be changed.
    • If the application type configured for a LUN does not match the actual I/O model, performance may deteriorate.
    • If none of the preset application types matches the actual I/O model, you can click Add to create the required type.

    [Example]

    Default

    Start ID

    ID of a LUN.

    NOTE:
    • The system automatically allocates an ID to a new LUN by default.
    • If you want to manually set a LUN ID, do not select Automatic allocate. Instead, enter an ID manually.
    • When creating a single LUN, the value you enter is the ID of the LUN.
    • When creating LUNs in batches, the system automatically allocates an ID to each LUN, starting from the specified value.

    [Example]

    1

    Use Type

    Use type of a LUN.

    • Common LUN

      Thin LUNs accessible to hosts.

    • PE LUN

      PE LUNs are only applied to VVol LUNs in VMware software defined storage. VVol LUNs provide storage space for VMs. A PE LUN is used as an I/O demultiplexer to simplify the connection between a VM and a VVol LUN. VM I/Os are sent to the corresponding VVol LUN through a PE LUN.

    [Default value]

    Common LUN

    Capacity

    Maximum capacity that will be allocated to a thin LUN. That is, the total storage resources dynamically allocated to the thin LUN cannot exceed the value of this parameter.

    [Value range]

    • The maximum capacity of thin LUNs must not exceed the system specifications.
    • The system can create block-level LUNs. To create a block-level LUN, select capacity unit Blocks. One block is 512 bytes.

    [Example]

    1 GB

    Quantity

    Number of LUNs created in one batch. Set this parameter based on your need.

    NOTE:

    All LUNs created in the same batch have the same capacity.

    [Value range]

    1 to 500

    [Example]

    2

    Manually specify the suffix

    When you create multiple LUNs, the system automatically adds a suffix to each LUN name for LUN distinction. If you want to manually set the start suffix number, select this option.

    NOTE:
    • This option is not displayed by default. To display it, click All options.
    • This parameter is valid only when the value of Quantity is greater than 1.
    • If this option is not selected, the suffix number starts at 0000 by default.

    [Example]

    -

    Start Number

    This parameter is valid after Manually specify the suffix is selected. From the configured start number, the system incrementally appends a suffix number to the name of each LUN for LUN distinction.

    [Value range]

    0 to (10000 – Number of LUNs to be created)

    NOTE:

    If you want to create 300 LUNs, the value range of the start number is 0 to 9700.

    Owning Storage Pool

    Storage pool to which the LUN you are creating belongs.

    [Example]

    StoragePool001

    NOTE:

    When you configure Capacity and Quantity, consider the management complexity. For example, fifty 1 TB LUNs are easier to manage than a hundred 500 GB LUNs.

  4. Set advanced properties for the LUN.

    • If you are creating a common LUN, perform the following steps:
      1. Click Advanced.

        The Advanced dialog box is displayed.

      2. Click the Properties and Tuning tabs to set the related parameters, as described in Table 4-8 and Table 4-9 respectively.
        Table 4-8 Properties parameters

        Parameter

        Description

        Setting

        Owning Controller

        Owning controller of a LUN.

        NOTE:

        You are advised to select Auto select. The system will then balance the load between the different controllers.

        [Example]

        Auto select

        [Default]

        Auto select

        Masquerading

        Masquerading replaces identification information of local LUNs with that of heterogeneous remote LUNs to take over the remote LUNs online.

        Inherited Masquerading can be set for local LUNs. Enable Inherited Masquerading and select Remote Device. After Inherited Masquerading is set for a LUN, the LUN can inherit the remote LUN's information, including the VID, PID, and SCSI protocol version.

        NOTE:

        Inherited masquerading enables local LUN masquerading for LUN capacity expansion when the remote LUN space is insufficient.

        [Default]

        Disabled

        Table 4-9 Tuning parameters

        Parameter

        Description

        Setting

        Priority Control

        Priority control of SmartQoS.

        NOTE:

        The SmartQoS feature requires a license.

        [Value range]

        The value can be Low, Medium, or High.

        A LUN or snapshot with a high priority can obtain system resources preferentially. You can set different values for specific LUNs or snapshots based on service priorities, ensuring critical service performance.

        [Example]

        Low

        [Default value]

        Low

        Traffic Control

        Traffic control policy of SmartQoS.

        NOTE:

        The SmartQoS feature requires a license.

        If no traffic control policy exists, click Create to create one. For details, see the "Creating a Traffic Control Policy" section in the SmartQoS Feature Guide.

        [Value range]

        The value is user defined.

        [Example]

        -

        [Default value]

        -

      3. Click OK. The Create LUN dialog box is displayed.

    • If you are creating a PE LUN, perform the following steps:
      1. Click Advanced.

        The Advanced dialog box is displayed.

      2. Select the owning controller of the PE LUN.
        Table 4-10 describes the related parameter.
        Table 4-10 Advanced properties of a PE LUN

        Parameter

        Description

        Setting

        Owning Controller

        Owning controller of the PE LUN.

        NOTE:

        You are advised to select Auto select. The system will then balance the load between the different controllers.

        [Example]

        Auto select

        [Default]

        Auto select

      3. Click OK.

        The Create LUN dialog box is displayed.

  5. Confirm the creation of the LUN.

    1. Click OK.

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

    2. Click Close.

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Updated: 2019-07-17

Document ID: EDOC1100049139

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