HP-UX 11i Version 2 December 2005 Release Notes

Disk and File Management
VERITAS File System (Base-VXFS and HP OnlineJFS)
Chapter 6
148
— Storage Checkpoint File System Restore: Storage Checkpoints can be used by
backup and restore applications to restore either individual files or an entire file
system.
— The reverse path name lookup feature uses the vxlsino command to obtain the
full path name of a file or directory corresponding to an inode.
— 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 named data streams feature allows the inode to be associated with multiple
data streams.
— Other Base-VXFS Enhancements:
—The fsadm command allows fragmentation, reporting, and defragmentation
operations on an individual file or directory, or on Storage Checkpoints.
— The default Storage Checkpoint creation mode is now removable.
— Operation of the intent log replay was improved to increase the speed of
recovery after a file system failure.
—The vx_ninode and vxfs_bc_bufhwm can be dynamically tuned without
rebooting the machine.
• OnlineJFS (requires a license and includes all base features, plus the following)
— The cross-platform data sharing feature allows data to be serially shared among
heterogeneous systems that have direct access to the physical devices holding
the data.
— The Quality of Storage Service (QoSS) feature allows mapping of more than one
device to a single file system.
— The VxFS File Change Log (FCL) tracks changes to files and directories in a file
system.
NOTE The libraries and commands for VxFS are contained in the EnableVxFS bundle.
Impact
Large File Systems and Large File Support:
The VXFS 4.1 release is the first release to support Disk Layout Version 6. File systems
up to 256 TB in size can be created on Disk Layout Version 6. However, file systems
larger than 1 TB can be created only on a 64-bit kernel on VERITAS Volume Manager. A
32 TB file system requires a 2 K block size, a 64 TB file system requires a 4 K block size,
and a 128 TB or larger file system requires an 8 K block size.
File systems over 32 TB are called extra large file systems and require a license to
create. However, only file systems up to 32 TB have been qualified and will be supported
as of this stage. In addition, the OnlineJFS license is required to create file systems over
2 TB and under 32 TB. The EBFS license is required to create file systems over 32 TB.
An online conversion utility, vxupgrade, is provided to upgrade existing disk layouts to
Disk Layout Version 6 on mounted file systems.