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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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Modifying Advanced Properties of a File System

Modifying Advanced Properties of a File System

This operation enables you to modify advanced properties of a file system.

Prerequisites

At least one file system is created.

Procedure

  1. Log in to DeviceManager.
  2. Choose Provisioning > File System.
  3. Select a file system whose advanced properties you want to modify and click Properties.

    The File System Properties dialog box is displayed.

  4. Change advanced properties of the file system.

    1. Select Advanced tab.
    2. Change advanced properties of the file system. Table 4-5 describes related parameters.
      Table 4-5 Advanced properties of a file system

      Parameter

      Description

      Value

      Capacity Alarm Threshold (%)

      Alarm threshold of the file system capacity.

      [Value range]

      The value is an integer ranging from 50 to 95.

      [Example]

      90

      [Default]

      90

      Checksum

      Specifies whether Checksum is enabled. This function is used to check data integrity. After it is enabled, checksum will be automatically calculated when data is being written, ensuring integrity of the data to be accessed.

      [Example]

      Enable

      [Default]

      Enable

      Automatic Update of Atime

      Specifies whether Automatic Update of Atime is enabled. Atime is a time when file systems are accessed. After this function is enabled, Atime will be updated every time data on file systems is accessed.

      [Example]

      Enable

      [Default]

      Disable

      Capacity Autonegotiation Policy

      A storage system supports the following capacity autonegotiation policies:

      • Not Use Capacity Autonegotiation: The storage capacity used by a file system is fixed and is not flexibly adjusted by the storage system.
      • Auto Expand Capacity: increases file system capacity and meets users' requirements in data write when the available space of a file system is about to run out and the storage pool has available space.
      • Auto Reduce or Expand Capacity: The storage system automatically adjusts the file system capacity based on file system space usage. When the available space of a file system is about to run out and the storage pool has available space, automatic capacity expansion will be used to increase file system capacity. When the file system's storage space is released, it can be reclaimed into a storage pool and used by other file systems in data write requests.

      [Example]

      Auto Expand Capacity

      [Default]

      Not Use Autonegotiation

      Capacity Reclamation Mode

      A storage system supports the following capacity reclamation modes:

      • Preferentially Expand Capacity: Expands the capacity to increase the file system capacity.

      [Example]

      Preferentially Expand Capacity

      [Default]

      Preferentially Expand Capacity

      Auto Adjust Capacity

      After you select Auto Adjust Capacity, the automatic capacity expansion or reduction policy for a file system will take effect during the service running.

      [Example]

      Enable

      [Default]

      Enable

      Auto Expand Trigger Threshold (%)

      When the ratio of the used capacity to the total capacity of the file system is greater than the preset value, the storage system automatically triggers file system capacity expansion.

      [Value range]

      The value is an integer ranging from 1 to 99.

      [Example]

      85

      [Default]

      85

      Auto Reduce Trigger Threshold (%)

      When the ratio of the used capacity to the total capacity of the file system is smaller than the preset value, the storage system automatically triggers file system space reclamation and reduces file system capacity.

      [Value range]

      The value is an integer ranging from 1 to 99.

      [Example]

      50

      [Default]

      50

      Auto Expand Upper Limit

      Sets the auto expand upper limit.

      [Value range]

      The value is an integer ranging from file system capacity to 16 PB.

      [Example]

      120 GB

      [Default]

      File system capacity * 120%

      Auto Reduce Lower Limit

      Sets the auto reduce lower limit.

      [Value range]

      The value is an integer ranging from 1 GB to Auto Expand Upper Limit.

      [Example]

      100 GB

      [Default]

      File system capacity

      Auto Expanded/Reduced Capacity Each Time

      Sets the auto expanded or reduced capacity for each time.

      [Value range]

      The value is an integer ranging from 64 MB to 100 GB.

      [Example]

      1 GB

      [Default]

      1 GB

    3. Click OK.

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

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

Document ID: EDOC1100021203

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