VERITAS Storage Foundation 4.1 Cluster File System HP Serviceguard Storage Management Suite Extracts, December 2005

Appendix ,
VxFS Functionality on Cluster File Systems
5
Unsupported Features
Functionality described as not supported may not be expressly prevented from operating
on cluster file systems, but the actual behavior is indeterminate. It is not advisable to use
unsupported functionality on CFS, or to alternate mounting file systems with these
options as local and cluster mounts.
Features and Commands Not Supported on CFS
Swap files
Swap files are not supported on cluster mounted file system.
Nested Mounts
You cannot use a directory on a cluster mounted file system as a
mount point for a local file system or another cluster file system.
The mknod command
You cannot use the mknod command to create devices on a
cluster mounted file system.
Cache advisories
Cache advisories are set with the mount command on
individual file systems, but are not propagated to other nodes of
a cluster.
Cached Quick I/O
This Quick I/O for Databases feature that caches data in the file
system cache is not supported.
Commands that depend
on file access times
File access times may appear different across nodes because the
atime file attribute is not closely synchronized in a cluster file
system. So utilities that depend on checking access times may
not function reliably.