VERITAS Storage Foundation 4.1 Release Notes

New and Enhanced Features
16 VERITAS Storage Foundation Release Notes
The reverse name lookup feature includes the following function in the API:
Intent Log Resize
With the Version 6 disk layout, the VxFS intent log can be increased or decreased using the log
option of the fsadm_vxfs. Dynamically changing the intent log size can improve system
performance. The maximum intent log size is now 2 GB. See the VERITAS File System
Administrator’s Guide and the mkfs_vxfs(1M) and fsadm_vxfs(1M) manual pages for more
information on intent log size.
Note Intent log resize is a licensed feature and requires a Online JFS or full license.
Named Data Streams
Traditional UNIX files have an inode identifier and a single stream of file data. Using named data
streams, the inode is retained, but can now be associated with multiple data streams. In VxFS 4.1,
the original data stream is accessed in the same way as in previous releases, but other 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 only through the following API functions:
VxFS Enhancements and Changes
◆ The fsadm command now 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 now upgrades only Version 4 and Version 5 disk layouts. Disk
layout versions prior to Version 4 cannot be mounted.
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.
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.