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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 Storage Pool

Creating a Storage Pool

This operation enables you to create a storage pool for an application server to use the storage space provided by a storage system.

Prerequisites

A disk domain has been created.

Context

For details about the maximum number of storage pools supported by the storage system, see "Software Specifications" in the product description corresponding to your product model.

Procedure

  1. Choose Provisioning > Storage Pool.
  2. Click Create.

    The Create Storage Pool dialog box is displayed.

    NOTE:

    GUIs may vary with product versions and models. The actual GUIs prevail.

  3. Name and describe the storage pool.

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

      Descriptive information, such as function and properties of the storage pool, helps identify the storage pool.

  4. In Available Disk Domain, select the disk domain that the storage pool belongs to.
  5. In Capacity, check the total capacity of the storage pool to be created.

    NOTE:
    • All the available capacity of the current disk domain will be used to create the storage pool.
    • The system converts capacities to GB. Digits after the decimal point are deleted automatically.
    • Storage system capacity conversion: 1 PB = 1,024 TB, 1 TB = 1,024 GB, 1 GB = 1,024 MB, 1 MB = 1,024 KB, 1 KB = 1,024 bytes.

  6. Set the advanced properties of the storage pool.

    1. Click Advanced to set the advanced properties of the storage pool.
      Table 4-6 describes the related parameters.
      Table 4-6 Parameters in the advanced properties of a storage pool

      Parameter

      Description

      Value

      RAID Policy

      The storage system uses a dynamic RAID policy.

      Dynamic RAID adopts the erasure coding (EC) algorithm. This algorithm can dynamically adjust the number of CKs in CKGs under all-flash configurations to meet the requirements of system reliability and capacity. If a CK is faulty and no CK is available from disks outside the disk domain, the system dynamically reconstructs the original N+M CKs to (N-1)+M CKs. When an extra SSD is inserted, the system then migrates data from (N-1)+M CKs to the newly constructed N+M CKs for efficient disk usage.

      The RAID policies are defined as follows:

      • RAID 5: Parity data is distributed on different CKs. In each CKG, the parity data occupies the space of one CK. The failure of one CK is allowed. If two or more CKs fail, RAID 5 protection can no longer be provided.
      • RAID 6: Parity data is distributed on different CKs. In each CKG, the parity data occupies the space of two CKs. The failure of two CKs is allowed. If three or more CKs fail, RAID 6 protection can no longer be provided.
      • RAID-TP: Parity data is distributed on different CKs. In each CKG, the parity data occupies the space of three CKs. The failure of three CKs is allowed. If four or more CKs fail, RAID-TP protection can no longer be provided.

      [Default value]

      RAID 6

      Capacity Alarm Threshold (%)

      When the percentage of the storage pool's allocated capacity to its total capacity reaches this threshold, the system generates a capacity alarm.

      A proper capacity alarm threshold helps you monitor the capacity usage of a storage pool.

      [Value range]

      1 to 95

      [Default value]

      80

      Capacity Used Up Alarm Threshold (%)

      When the percentage of the storage pool's allocated capacity to its total capacity reaches this threshold, the system generates an alarm indicating that the capacity is being used up. The severity of this alarm is higher than that of the capacity alarm.

      NOTE:

      The value of Capacity Used Up Alarm Threshold must be greater than that of Capacity Alarm Threshold.

      [Value range]

      2 to 99

      [Default value]

      90

      Enable Thin LUN Overcommitment

      Specifies whether to enable thin LUN overcommitment. If you enable this function, specify Thin LUN Overcommitment Percentage (%).

      [Default value]

      Disabled

      Thin LUN Overcommitment Percentage (%)

      Percentage of the capacity that can be used to create thin LUNs to the total capacity of the storage pool.

      NOTE:
      • Assume that a storage pool's total capacity is 100 GB and Thin LUN Overcommitment Percentage is 150%. Creating a thin LUN will fail if the total thin LUN capacity exceeds 150 GB, that is, (New thin LUN's capacity + Existing thin LUNs' capacity)/Storage pool's total capacity > 150%. Similarly, expanding thin LUN capacity will fail if the percentage of the thin LUN capacity after expansion to the storage pool's total capacity exceeds 150%.
      • If Thin LUN Overcommitment Percentage is set to 0, no thin LUN can be created or expanded in the storage pool.
      • If the thin LUN overcommitment function is enabled, you are advised to set Thin LUN Overcommitment Percentage to a value greater than 100%.
      • The capacity of thin LUNs does not include the capacity of thin LUNs' snapshots.

      [Value range]

      0 to 65535

      [Default value]

      Disabled

      Automatically Delete Scheduled Data Protection

      This function enables the system to automatically delete the earliest HyperCDP objects when the percentage of the protection capacity to the storage pool's total capacity exceeds Protection Capacity Upper Limit. Automatic deletion stops when the percentage becomes smaller than Protection Capacity Lower Limit.

      [Default value]

      Disabled

      Protection Capacity Lower Limit (%)

      After Automatically Delete Scheduled Data Protection is enabled and triggered, the system automatically deletes the earliest HyperCDP objects until the percentage of the protection capacity in the total storage pool capacity falls below this threshold.

      NOTE:

      This parameter is available only after Automatically Delete Scheduled Data Protection is enabled.

      [Value range]

      1 to 95

      [Default value]

      20

      Protection Capacity Upper Limit (%)

      Percentage of the maximum protection capacity in the total storage pool capacity.

      NOTE:
      • This parameter is available only after Automatically Delete Scheduled Data Protection is enabled.
      • The protection capacity upper limit must be greater than the protection capacity lower limit.

      [Value range]

      2 to 99

      [Default value]

      30

    2. Click OK.

  7. Click OK.

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

  8. Click Close.
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Updated: 2019-07-17

Document ID: EDOC1100049139

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