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OceanStor 2600 V3 Video Surveillance Edition V300R006 Basic Storage Service Configuration Guide for File

This document is applicable to OceanStor OceanStor 2600 V3 Video Surveillance Edition. This document describes the basic storage services and explains how to configure and manage basic storage services for storage system.
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Creating a Storage Pool

Creating a Storage Pool

This section describes how to create storage pools for application servers to use the storage space provided by a storage system.

Prerequisites

A disk domain has been created.

Context

  • A storage pool is a logical combination of one or multiple storage tiers in a disk domain. Different storage tiers may have different RAID policies.
  • A RAID policy includes a RAID level and the number of data blocks and parity block for this RAID level.
  • A RAID level is available in typical and atypical configurations based on number of disk blocks and parity blocks. Table 3-2 describes the detailed configurations.
    Table 3-2 RAID level configuration

    RAID Level

    Typical Configuration

    Flexible Configuration

    RAID 0

    -

    -

    RAID 1

    • 2Da
    • 4D

    -

    RAID 10

    -

    -

    RAID 3

    • 2D+1Pb
    • 4D+1P
    • 8D+1P

    Configurations from 2D+1P to 13D+1P except typical configurations

    RAID 5

    • 2D+1P
    • 4D+1P
    • 8D+1P

    Configurations from 2D+1P to 13D+1P except typical configurations

    RAID 50

    • (2D+1P) x 2
    • (4D+1P) x 2
    • (8D+1P) x 2

    -

    RAID 6

    • 2D+2P
    • 4D+2P
    • 8D+2P
    • 16D+2P

    Configurations from 2D+2P to 26D+2P except typical configurations

    a: D indicates a data block.

    b: P indicates a parity block.

Procedure

  1. Log in to DeviceManager.
  2. Choose Provisioning > Storage Pool.
  3. Click Create.

    The Create Storage Pool dialog box is displayed.

  4. Name and describe the storage pool.

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

  5. In Usage, select File Storage Service.

    NOTE:

    Usage is unchangeable after being configured.

    • A storage pool whose Usage is Block Storage Service allows you to create LUNs only.
    • A storage pool whose Usage is File Storage Service allows you to create file systems only.

    To optimize performance, use different disk domains to create storage pools for the block storage service and file storage service.

  6. In Disk Domain, select the disk domain to be added.
  7. In Storage Medium, select the storage tiers needed for the storage pool and set related parameters.

    1. Select storage tiers that meet service requirements.
    2. Set basic properties for the storage tiers.
      Table 3-3 describes related parameters.
      Table 3-3 Storage tier parameters

      Parameter

      Description

      Value

      RAID Policy

      RAID level. The system supports RAID 0, RAID 1, RAID 10, RAID 3, RAID 5, RAID 50, and RAID 6.

      NOTE:

      RAID 0 can only be configured using the CLI. For details, see the command reference specific to your product model.

      [Example]

      Use NL-SAS or SATA disks to create RAID 6 (26D+2P).

      Capacity

      Capacity that the storage tier provides for the storage pool.

      Two capacity levels are provided: TB and GB.

      The capacity must be no larger than the available capacity of the storage tier.

  8. For V300R006C50 and later versions, enable the system to use the enhanced data protection policy.

    Table 3-4 describes the related parameters.
    Table 3-4 Related parameters

    Parameter

    Description

    Setting

    Use the enhanced data protection policy

    After Use the enhanced data protection policy is selected, the system will check service configurations according to the recommended data protection policy to avoid configurations with low reliability.

    NOTE:

    Some product versions do not support this parameter. The actual GUIs prevail.

    [Default value]

    Enable

  9. Optional: Set advanced properties for the storage pool.

    1. Click Advanced.

      The Advanced Property Settings dialog box is displayed.

      Table 3-5 describes the related parameters.

      Table 3-5 Storage pool advanced parameters

      Parameter

      Description

      Value

      Used Capacity Alarm Threshold (%)

      If the storage pool contains a file system with value-added services, or a thin file system, an alarm will be generated when the percentage of the storage pool's used capacity to its total capacity reaches the used capacity alarm threshold. Alarms are generated in the following circumstances:

      • When the used capacity reaches the used capacity alarm threshold, the system generates an alarm informing that the capacity of storage pool is insufficient.
      • When the used capacity alarm threshold is not greater than 88 and the used capacity reaches 90%, the system generates an alarm informing that the storage pool is running out.
      • When the used capacity alarm threshold is greater than 88 and the used capacity reaches (used capacity alarm threshold + 2) %, the system generates an alarm informing that the storage pool is running out.
      NOTE:

      If the used capacity alarm threshold is set to 85:

      • When the used capacity reaches 85%, the system generates an alarm informing that the capacity of storage pool is insufficient.
      • When the used capacity reaches 90%, the system generates an alarm informing that the storage pool is running out.

      If the used capacity alarm threshold is set to 91:

      When the used capacity reaches 93%, the system generates an alarm informing that the storage pool is running out.

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

      [Value range]

      1 to 95

      [Default value]

      80

      Data Migration Granularity

      A logical storage space with a fixed size divided from a CKG. It is the smallest unit (granularity) for data migration and hotspot data statistics collection. It is also the smallest unit for space application and release in a storage pool. The default value 4 MB is recommended. The value cannot be changed after being set.

      [Value range]

      512 KB to 64 MB

      [Default value]

      4 MB

      Stripe Depth

      Stripe refers to that continuous data is divided into data blocks of the same size and data blocks are distributed on different disks. In this way, I/O loads are balanced among disks, improving read/write performance.

      Stripe depth refers to stripe size, indicating the size of data blocks on each disk. A smaller stripe size indicates smaller data blocks. Smaller data blocks are distributed on more disks, improving transmission performance. However, more time is required to find different data blocks, decreasing disk locating performance. On the contrary, fewer data blocks indicate lower transmission performance but higher disk locating performance.

      The value of this parameter can be:

      • System auto select

        The system selects the optimal stripe depth based on the RAID policy of the storage tier and data migration granularity.

      • 32 KB
      • 64 KB
      • 128 KB

        128 KB is recommended for random read/write services (such as in database services).

      • 256 KB
      • 512KB

        512 KB is recommended for sequential read/write services (such as Media & Entertainment services)

      NOTE:

      The parameter value cannot be changed after being set.

      [Default value]

      System auto select

    2. Click OK.

  10. In the Create Storage Pool dialog box, click OK.

    NOTE:

    If a security alert dialog box is displayed, confirm the information in the dialog box and select I have read and understand the consequences associated with performing this operation. Click OK.

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

  11. Click Close.
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Updated: 2019-07-12

Document ID: EDOC1100021203

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