Managing Systems and Workgroups: A Guide for HP-UX System Administrators

Planning a Workgroup
Planning to Manage File Systems
Chapter 2 87
Basic JFS functionality is included with the HP-UX operating system
software. With the installation of a separately orderable product called
HP OnLineJFS, JFS also provides online administrative operations,
including backup, resizing, and defragmentation.
The advantages of JFS are well worth the small amount of learning
required to use it.
For procedural information pertinent to JFS file systems, go to:
• “Converting Existing File Systems to JFS” on page 644
• “Resizing a JFS File System” on page 652
• “Defragmenting a JFS File System” on page 643
• “Dealing with File System Corruption” on page 613
• “Backing Up a JFS Snapshot File System” on page 694
NOTE For additional information about JFS capabilities, see Disk and File
Management Tasks on HP-UX, published by Prentice Hall. Also see the
HP JFS, the HP OnLineJFS, and the VERITAS File System
documentation available on http://docs.hp.com.
http://docs.hp.com/hpux/os/11i/index.html#VERITAS%20Volume%
20Manager%20and%20File%20System
Frequently Asked Questions about the Journaled File
System
What is JFS?
JFS is the HP-UX implementation of the VERITAS journaled file system
(VxFS) introduced in HP-UX 10.01. It features high reliability, fast
recovery, and online administrative operations, including backup,
resizing and defragmentation.
For how long has JFS been available in HP-UX?
HP phased in the implementation of JFS over several releases:
• HP-UX 10.01 introduced an initial porting of JFS, based on
VERITAS Version 2 VxFS, for mountable (but not root) file systems.
Until then, HFS (high-performance file system) was the only locally
mounted read/write file system available.