Veritas File System 5.0.1 Release Notes

NOTE: These features are available only with the HP OnlineJFS license.
System Requirements
The operating system version supported and the patches required for VxFS 5.0.1 on HP-UX 11i
v3 are as follows:
• Operating System Version
HP-UX 11i v3 0903 OEUR (or later)
• Required Patches
For information on the required and recommended patches, see Veritas 5.0.1 Installation
Guide HP-UX 11i v3.
Compatibility With Previous Versions of VxFS
The following section discusses the compatibility of VxFS 5.0.1 with the previous VxFS releases:
• The VxFS 5.0.1 release does not support creating or mounting disk layout version 1, 2, or 3
file systems. HP recommends that you upgrade any previously installed VxFS file system
to Disk Layout Version (DLV) 7 available with VxFS 5.0.1.
An online conversion utility vxupgrade is provided to upgrade existing disk layouts to
Disk Layout Version 7 on mounted file systems.
CAUTION: Do not upgrade /stand and / file systems to Disk Layout Version 6 or Disk
Layout 7. The HP-UX boot loader does not understand this layout. The HP-UX boot loader
does not recognize DLV greater than 5.
• The disk layout of a VxFS file system can be upgraded after installing VxFS 5.0.1. Use the
vxupgrade (1M) command to upgrade the disk layout from Version 4 or 5 to disk layout
Version 6, and then upgrade to Version 7 on a mounted file system. Use the vxfsconvert (1M)
command to convert an unmounted file system to VxFS Disk Layout Version 7.
NOTE: A Disk Layout Version 7 or Disk Layout Version 6 file system created with VxFS
5.0.1 software is not accessible if the VxFS 5.0.1 file system software is removed and the
system is reverted to VxFS 4.1, which is the default supported with HP-UX 11i v3 release.
Tuning VxFS for Performance
• Tuning down the inode cache
VxFS allocates and releases inodes based on the file system load. Generally, larger inode
caches help the file system to perform better in the case of a file server or web server load.
The global tunable, vx_ninode, determines the maximum possible size of the VxFS inode
cache. If the default value of vx_ninode is set to zero, VxFS automatically tunes the size
of the inode cache at boot time, based on the size of the physical memory on the system. On
systems with a RAM size of less than or equal to 1 GB, you can manually tune down
vx_ninode to a value not less than that of ninode. If the user does not manually tune the
value of vx_ninode then VxFS calculates vx_ninode value based on system memory.
VxFS ensures that the value of vx_ninode is not less than ninode. For more information
on these commands, see vx_ninode(5).
• Tuning down the buffer cache
VxFS 5.0.1 implements a private buffer cache to use exclusively for metadata. The allocations
to this buffer cache vary during system usage based on the file system load and the maximum
System Requirements 7