HP-UX 11i Release Notes (December 2000)

New and Changed Disk and File Management Features
New Version of Journaled File System (JFS) (new)
Chapter 9176
system if there were file extents residing in the area being reduced. Now,
JFS 3.3 with the version 4 disk layout, attempts to move extents off the
area of the file system being reduced. This provides a greater chance of
success when shrinking JFS file systems. However, there may still be
some occasions where JFS cannot move extents off the area of the file
system being reduced, in which case a shrink will still fail.
All VxFS manual pages are updated, and manual pages for generic
HP-UX commands and functions which accommodate ACLs (e.g., cp,
find) are also updated. See Managing Systems and Workgroups: A Guide
for HP-UX System Administrators, part no. B2355-90701 for a
description of JFS ACLs and how to use them.
The VERITAS File System System Administrator's Guide, written by the
VERITAS Software Corp. and customized by HP, will be available on
HP’s documentation Web site at http://docs.hp.com and on the
Instant Information CD, in both HTML and PDF formats.
Compatibility Issues
JFS ACLs use a different format from HFS ACLs. The new command,
vxfsconvert (1M) will convert an HFS file system to a JFS file system. It
will also convert HFS ACLs to JFS ACLs, with the limitation that HFS
ACLs with no JFS ACL equivalent will not be converted. See Managing
Systems and Workgroups: A Guide for HP-UX System Administrators",
part no. B2355-90701 for a description of the procedure for converting a
file system.
JFS ACLs require a file system created or upgrading from the new disk
layout, version 4. You can use the vxupgrade command to upgrade a file
system from an older disk layout to version 4.
JFS 3.3 uses new header files. As far as the JFS module is concerned, a
well-behaved application will not need to be recompiled, but a
kernel-intrusive application will need to be recompiled with the new
header files, and possibly with some corresponding code changes. You
should check with the application provider before upgrading.
Performance Issues
JFS 3.3 generally outperforms previous releases. Design changes have
reduced the number of bottlenecks resulting from globally shared locks.
JFS includes tunables and features to support improved performance in
the OLTP, DSS, and technical computing markets. With appropriate