Modifying a Migration Policy

Procedure

1. Choose Services > HDFS Service > Tiering.
2. Click the Migration Policy tab.
3. Select the desired file system from the left list, click More on the right of the desired migration policy, and select Modify.

   The Modify Migration Policy page is displayed.

4. Modify basic information about the migration policy.
   Table 1 describes related parameters.

   Table 1 Migration policy parameters

   Parameter	Description
   Filter Policy	Indicates a file filtering policy. Possible options are By file name and By file operation time. By file name Select Including or Excluding in File Name Filtering to determine whether files with the specified names are included or excluded in the migration policy. Then, specify the file names to be filtered for or filtered. NOTE: 1 to 1023 characters can be entered in the text box. Wildcard (*) can match any character. The following formats are supported: *, *example*, *example, example*, and example*example. Multiple file names are separated using commas (,). By file operation time Specify a specific operation time. Then, the migration policy takes effect on files whose history operation times meet all of the specified times, including crtime, mtime, ctime, and atime. crtime: indicates the file creation time. mtime: indicates the file modification time. ctime: indicates the file property modification time. atime: indicates the last file access time.
   Tier Grade	Indicates the tier grade of the migration policy. That is, the grade of the disk pool to which files are migrated. A disk pool's tier grade is specified during disk pool creation.

5. Click OK.