Veritas File System 5.1 SP1 Release Notes

• Tuning performance optimization of inode allocation
Starting with the VxFS 5.1 SP1 release, you can optimize the way in which inodes are reused
in inode cache by setting the delicache_enable tunable parameter. It specifies whether
performance optimization of inode allocation and reuse during a new file creation is turned
on or not.
• Veritas File System is more thin-friendly tunable
Thin Provisioning is a storage array feature that optimizes storage use by automating storage
provisioning. Administrators do not have to estimate how much storage an application requires.
Instead, Thin Provisioning lets administrators provision large thin or thin reclaim capable LUNs
to a host. Physical storage capacity is allocated from a thin pool to the thin/thin reclaim
capable LUNS only after application I/O writes.
Starting with the VxFS 5.1 SP1 release, you can tune VxFS to enable or disable thin-friendly
allocations. This feature is only supported on file systems mounted on a VxVM volume.
• Partitioned Directories
VxFS 5.1 SP1 allows you to create partitioned directories. For every new create, delete, or
lookup thread that is created, VxFS searches for the thread's respective hash directory and
performs the operation in that directory. This allows uninterrupted access to the parent directory
inode and its other hash directories, which significantly improves the read/write performance
of cluster file systems.
This feature is supported only on file systems with DLV 8 or later.
For more information, refer to the Veritas File System 5.1 SP1 Administrator's Guide. To locate
this document, go to the HP-UX Core docs page at: www.hp.com/go/hpux-core-docs. On
this page, select HP-UX 11i v3.
System Requirements
The operating system version supported and the patches required for VxFS 5.1 SP1 on HP-UX 11i
v3 are as follows:
• Operating System Version
HP-UX 11i v3 March 2011 Operating Environment Upgrade Release (OEUR) or later.
• Required and Recommended Patches
For information on the required and recommended patches, see Veritas 5.1 SP1 Installation
Guide HP-UX 11i v3. To locate this document, go to the HP-UX Core docs page at:
www.hp.com/go/hpux-core-docs. On this page, select HP-UX 11i v3.
Compatibility With Previous Versions of VxFS
The following section discusses the compatibility of VxFS 5.1 SP1 with the previous VxFS releases:
• The VxFS 5.1 SP1 release does not support creating or mounting DLV 1, 2 or 3 file systems.
HP recommends that you upgrade any previously installed VxFS file system to DLV 7 available
with VxFS 5.1 SP1.
An online conversion utility vxupgrade is provided to upgrade existing disk layouts to DLV
7 on mounted file systems.
CAUTION: Do not upgrade /stand and / file systems to DLV 6 or DLV 7. The HP-UX boot
loader does not recognize disk layout versions greater than 5.
• The disk layout of a VxFS file system can be upgraded after installing VxFS 5.1 SP1. Use the
vxupgrade (1M) command to upgrade the disk layout from Version 4 or 5 to Version 6, and
System Requirements 5