File clones and policy files

The following clone attributes can be examined in a policy file:

• The depth of the clone tree.
• If file is an immutable clone parent.
• The fileset ID of the clone parent.
• The inode number of the clone parent for the file.
• If the clone parent is in a snapshot.
• The snapshot ID of the clone parent.

See File attributes in SQL expressions for more information about the clone attributes available for policy files.

The following example shows a policy file that can be created for displaying clone attributes for all files:

RULE EXTERNAL LIST 'x' EXEC ''
RULE 'nonClone' LIST 'x' SHOW('nonclone') WHERE Clone_Parent_Inode IS NULL
RULE 'normalClone' LIST 'x' SHOW(
  'inum ' || varchar(Clone_Parent_Inode) ||
  ' par ' || varchar(Clone_Is_Parent) ||
  ' psn ' || varchar(Clone_Parent_Is_Snap) ||
  ' dep ' || varchar(Clone_Depth))
  WHERE Clone_Parent_Inode IS NOT NULL AND Clone_Parent_Is_Snap == 0
RULE 'snapClone' LIST 'x' SHOW(
  'inum ' || varchar(Clone_Parent_Inode) ||
  ' par ' || varchar(Clone_Is_Parent) ||
  ' psn ' || varchar(Clone_Parent_Is_Snap) ||
  ' dep ' || varchar(Clone_Depth) ||
  ' Fid ' || varchar(Clone_Parent_Fileset_Id) ||
  ' snap ' || varchar(Clone_Parent_Snap_Id))
  WHERE Clone_Parent_Inode IS NOT NULL AND Clone_Parent_Is_Snap != 0

If this policy file was called pol.file, the following command would display the clone attributes:

mmapplypolicy fs0 -P pol.file -I defer -f pol -L 0