Dynamic Storage Tiering - Sample Policy File

Dynamic Storage Tiering (DST) policies provide extensive controls to determine on which tier to create a file, and when/why it should move to a different tier. This sample file, in contrast, implements perhaps the simplest DST  policy. It creates new files on Tier 1 (unless Tier 1 is full, in which case it creates new files on Tier 2); and it relocates files on Tier 1 whose atime is >30 days to Tier 2. In this way it provides a starting point for novice DST users.

This policy is written for a VxFS file system version 5.0 or higher, disklayout 7 or higher, consisting of two volumes in a volume set:
A Tier 1 volume, with the volume tag vxfs.placement_class.tier1
A Tier 2 volume, with the volume tag vxfs.placement_class.tier2
To tag a volume:
# vxassist -g diskgroup settag volumename tagname=vxfs.placement_class.tier1

To apply this policy to a given file system, see the fsppadm man page -- for example:
http://sfdoccentral.symantec.com/sf/5.0MP3/linux/m...