Veritas File System 5.0 Release Notes, HP-UX 11i v3, First Edition, May 2008

fcl_winterval Specifies the time in seconds that must elapse before the VxFS FCL
records a data overwrite, data extending write, or data truncate for a
file.
fcl_ointerval Specifies the time interval in seconds within which subsequent opens
of a file do not produce an additional FCL record. This helps to reduce
the number of repetitive file-open records logged in the FCL, especially
in the case of frequent accesses through NFS.
See vxtunefs (1M) manpage, for more information on these tunables.
The FCL feature includes the following functions as part of the application programming
interface (API):
Table 1-1 Application Programming Interfaces (APIs) for FCL
DescriptionAPI
Reset to the first record after a given time interval
vxfs_fcl_seektime
Returns the event mask
vxfs_fcl_geteventmask
Increment and set the synccount on the FCL superblock and
return the new synccount value
vxfs_fcl_sync
Returns the FCL file handle
vxfs_fcl_open
Closes the FCL file descriptors
vxfs_fcl_close
Populate the state and version information in the fcl_info
structure.
vxfs_fcl_getinfo
Obtain the cookie for a given FCL handle
vxfs_fcl_getcookie
Return the event mask for a given FCL handle
vxfs_fcl_geteventmask
Reset to the given offset in the FCL file
vxfs_fcl_seek
Reset to the first record after the given time interval using a
block level binary search on the FCL file.
vxfs_fcl_seektime
Read the FCL file from current offset and return the formatted
fcl_record structures in the user buffer.
vxfs_fcl_read
Copy a fcl_record structure. Relocate the pointers to point
to appropriate locations in the copy.
vxfs_fcl_copyrec
NOTE: To enable the FCL feature an additional license is required. The FCL feature is
available with Base-VxFS and HP OnlineJFS. See Table 1-3 for the products that bundle this
license.
• File-to-Volume and Volume-to-File Mapping in MVFS
The following two new commands are supported:
— fsmap: The fsmap command reports the extent information for files in a VxFS file
system and displays a list of devices that hold the extents for the specified files. The
fsmap command reports the volumes on which the extent resides, logical offset (for
data extents, only) and extent size for each of the extents. For more information on
fsmap, see fsmap(1).
— fsvmap: The fsvmap command determines the data file that is resident on a given
volume in a multi-volume file system and recovers only the affected files in cases where
an unprotected volume is permanently lost.
For more information on fsvmap, see fsvmap(1).
8 Veritas File System 5.0 Release Notes