VERITAS File System 4.1 Release Notes (June 2006)

VERITAS File System 4.1 Release Notes
New Features
Chapter 1 13
vxlsino VxFS reverse path name lookup utility.
The reverse path name lookup feature includes the following application programming
interface (API) functions:
vxfs_inotopath Returns path names for a given inode number.
vxfs_inotopath_gen Returns path names for a given inode number with a specific
generation count.
• Intent Log Resize
The VxFS intent log can be resized using the log option of the fsadm command.
Dynamically changing the intent log size can improve system performance. The maximum
intent log size is now 2 gigabytes. For more information on intent log resizing refer to the
VERITAS File System Administrator’s Guide and the mkfs_vxfs(1M) and
fsadm_vxfs(1M) manpages for more information on intent log size.
• Named Data Streams
The named data streams feature allows the inode to be associated with multiple data
streams. In VxFS 4.1, the original data stream is accessed in the same way as in the
previous releases, but new data streams are referenced through a new directory inode
associated with the file. The directory inode points to the new inodes, one per stream. The
directory containing the named streams is not directly visible to the user.
VxFS named data stream functionality is available through the following application
programming interface (API) functions:
vxfs_nattr_link Links to a named data stream.
vxfs_nattr_open Open a named data stream.
vxfs_nattr_rename Renames a named data stream.
vxfs_nattr_unlink Removes a named data stream.
• Other Base-VXFS Enhancements
— The fsadm command allows fragmentation, reporting, and defragmentation
operations on an individual file or directory, or on Storage Checkpoints.
— Disk layout versions prior to version 4 cannot be mounted. Use the vxfsconvert
command to convert them to a disk layout version that can be mounted.
— The vxupgrade command upgrades only Disk Layout Version 4 and Disk Layout
Version 5. Disk layout versions prior to version 4 cannot be mounted.
— The largefiles option is now the default file size option for the mount command and
mkfs command.