Modifying File Policies

Context

• Before the policy is modified, if a file to be relocated does not match the new policy, it will be relocated in the background based on the existing policy.
• Before the policy is modified, if a file to be relocated matches the new policy, it will be relocated based on the new policy.

Procedure

1. Log in to DeviceManager.
2. Go to the file system page.
   • If you are a system user, click vStore, select the desired vStore, and click Details to go to the vStore view. Then, choose Provisioning > File System.
   • If you are a vStore user, choose Provisioning > File System in the vStore view.

3. Select the file system for which you want to configure SmartTier, and choose More > Configure SmartTier.

   The Configure SmartTier dialog box is displayed.

4. In the File Policy area, click Modify under the Operation column of the file policy you want to modify.

   The Modify Policy dialog box is displayed.

5. Modify the policy name and describe the policy.
   1. Enter the name of the policy to be created in Name.

      A name must:

      • Be unique.
      • Contain only letters, digits, and underscores (_).
      • Contain 1 to 31 characters.
   2. Enter information as a policy identifier in Description, such as the usage and properties of the policy to be created.

6. Select options for policy creation in Condition.

   Select at least one of Time, File name, File name extension, and File size, and do not repeat the settings.

   1. Optional: If you select Time, perform the following operations:
      1. Select one of the following to set the time type:
         • Creation time: time when a file is created
         • Access time: time when data in the file is last accessed
         • When configuring a relocation policy based on Access time for a file system, you are advised to enable Automatic Update of Atime. To enable this function, choose Provisioning > File System. Then select the desired file system, choose Properties > More > Advanced, and enable Automatic Update of Atime. After this function is enabled, wait a period of time until the Atime (access time) of the files is updated, and enable the Atime-based policy. If Automatic Update of Atime is disabled, frequently-accessed files in the file system may be wrongly relocated, resulting in slow access to these files.
         • If you select Access time for Time, a Danger dialog box will be displayed. Read the content of the dialog box carefully, select I have read and understand the consequences associated with performing this operation, and then click OK.
         • Modification time: time when the attributes of a file are modified
         • Change time: last time when the content of a file is modified
      2. Select ≤ or > to set time range limit.
      3. Enter the specific time and select the unit.

         When the unit is Day(s), the value ranges from 1 to 3650.

         When the unit is Month(s), the value ranges from 1 to 120.

         When the unit is Year(s), the value ranges from 1 to 10.

   2. Optional: If you select File name, perform the following operations:
      1. Select Match or Mismatch to determine whether to match the entered file names.
      2. Enter file names.
      • A file name contains a maximum of 255 characters, including digits, letters, spaces, or special characters (!#$%&'()+,-.;=@[]^_`{}~).
      • A maximum of 30 file names can be entered. Separate the names with colons (:) and ensure that the total number of characters does not exceed 511.
      • Wildcard characters like question marks (?) and asterisks (*) are supported, but asterisks (*) must be at the end of a name. Example: test, test:example, or test:example:*.
   3. Optional: If you select File name extension, perform the following operations:
      1. Select Match or Mismatch to determine whether to match the entered file name extensions.
      2. Enter file name extensions.
      • A file name extension contains a maximum of 127 characters, including digits, letters, spaces, or special characters (!#$%&'()+,-;=@[]^_`{}~).
      • A maximum of 30 file name extensions can be entered. Separate the file name extensions with colons (:) and ensure that the total number of characters does not exceed 511. For example, html:css.
   4. Optional: If you select File size, perform the following operations:
      1. Select ≤ or > to specify the file size limit.
      2. Specify the file size.
      3. Select a unit.

7. Optional: Select Usage.

   It is the occupied SSD capacity/SSD Capacity Upper Limit of User Data. That is, when the SSD usage of file systems reaches the preset value, the storage system relocates data to HDDs.

   This parameter is valid only when Target Storage Medium is set to HDD.

8. Select SSD or HDD for storing the policy in Target Storage Medium.
9. Click OK.

   The Success dialog box is displayed, indicating that the operation succeeded.

10. Click OK.