NFS Services Administrator's Guide (B.11.31.03) August 2008

NOTE: For information on how to force a cache consistency check, see “Forcing
a Cache Consistency Check” (page 120).
— noconst
Disables consistency checking. Use this option only if you know that the contents
of the back filesystem are rarely modified.
— weakconst
Verifies cache consistency with the NFS client's copy of the file attributes.
NOTE: Consistency is not checked at file open time.
• Switching Mount Options
You can also switch between mount options without deleting or rebuilding the
cache. For example, you can switch from default to non-shared, or from
noconst to demandconst mount options without recreating the cache. For
information on how to switch mount options, see “Switching Mount Options”
(page 115).
• Support for Large Files and Large Filesystems
CacheFS supports the maximum file and filesystem sizes supported by the
underlying front filesystem and the back filesystem.
CacheFS data structures are 64-bit compliant.
• Support for ACLs
An Access Control List (ACL) offers stronger file security by enabling the owner
of the file to define file permissions for specific users and groups. This version of
CacheFS on HP-UX supports ACLs with VxFS and NFS and not with HFS.
• Support for Logging
A new command, cachefslog, is used to enable or disable logging for a CacheFS
mount-point. If logging functionality is enabled, details about the operations
performed on the CacheFS mount-point are stored in a logfile. The logfile also
contains information on all the operations performed on all CacheFS mount-points
that use the same cache directory. The cachefswssize command is used to
display the amount of space taken by each of the filesystems in the same cache
and the total size occupied by the cache directory (also known as the working set
size). This command uses the logfile created by the cachefslog command to
display the information.
Features of CacheFS 113