Storage Foundation Cluster File System High Availability is based on Veritas File System (VxFS).
Most of the major features of VxFS local file systems are available on cluster file systems, including the following features:
Extent-based space management that maps files up to one terabyte in size
Fast recovery from system crashes using the intent log to track recent file system metadata updates
Online administration that allows file systems to be extended and defragmented while they are in use
Every VxFS manual page has a section on "Storage Foundation Cluster File System High Availability Issues" with information on whether the command functions on a cluster-mounted file system and indicates any difference in behavior from local mounted file systems.