Veritas Storage Foundation 5.1 SP1 Advanced Features Administrator"s Guide (5900-1503, April 2011)

To list placement classes
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List the volume tags, including placement classes:
# vxassist -g cfsdg listtag vsavola
# vxvoladm -g cfsdg listtag vsavola
Administering placement policies
A VxFS file placement policy document contains rules by which VxFS creates,
relocates, and deletes files, but the placement policy does not refer to specific file
systems or volumes. You can create a file system's active file placement policy by
assigning a placement policy document to the file system via the fsppadm command
or the GUI.
See the fsppadm(1M) manual page.
At most, one file placement policy can be assigned to a VxFS file system at any
time. A file system may have no file placement policy assigned to it, in which case
VxFS allocates space for new files according to its own internal algorithms.
In systems with Storage Foundation Management Server (SFMS) software installed,
file placement policy information is stored in the SFMS database. The SFMS
database contains both XML policy documents and lists of hosts and file systems
for which each document is the current active policy. When a policy document is
updated, SFMS can assign the updated document to all file systems whose current
active policies are based on that document. By default, SFMS does not update file
system active policies that have been created or modified locally, that is by the
hosts that control the placement policies' file systems. If a SFMS administrator
forces assignment of a placement policy to a file system, the file system's active
placement policy is overwritten and any local changes that had been made to the
placement policy are lost.
You can view sample placement policies in the /opt/VRTSvxfs/etc directory.
These sample placement policies are installed as part of the VxFS package
installation.
Assigning a placement policy
The following example uses the fsppadm assign command to assign the file
placement policy represented in the XML policy document /tmp/policy1.xml for
the file system at mount point /mnt1.
343Administering SmartTier
Administering placement policies