HP-UX 11i September 2001 Release Notes

New and Changed Disk and File Management Features
New Version of Journaled File System (JFS) (new at 11i original release)
Chapter 9
145
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 also converts HFS ACLs to JFS
ACLs, with the limitation that HFS ACLs with no JFS ACL equivalent are not
converted. See Managing Systems and Workgroups: A Guide for HP-UX System
Administrators", part no. B2355-90742 for a description of the procedure for converting a
file system.
JFS ACLs require a file system with 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 tuning, JFS 3.3 outperforms HFS in all categories.
JFS 3.3 includes a new command, vxtunefs, for tuning a VxFS file system. See vxtunefs
(1M) and tunefstab (4). Also see the "HP JFS 3.3 and HP OnLineJFS 3.3 VERITAS File
System 3.3 System Administrator's Guide" for information on tuning a JFS file system.
NOTE The volcopy (1M) and labelit (1M) commands will be obsoleted in a future release.
Customers should use vxdump and vxrestore for backup and restore, or they can use an
application-specific utility. You can use dd to make a literal copy of the file system.