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

Planning a Workgroup
Planning to Manage File Systems
Chapter 2 85
Determining What Type of File System to Use
As of HP-UX 11.0, the Journaled File System (JFS) is installed as the
default for root and other HP-UX file systems. However, four other
file-system types are available for use on HP-UX. Information on each is
presented in the following table:
a. Using JFS (default version is 3.3)
b. Using JFS (default version is 3.5), LVM’s limitation is 2TB
c. On a Superdome using 512MB DIMMS
d. On a Superdome using 1GB DIMMS
e. HP-UX Supports 1TB - memory capacities vary by machine type
Table 2-4 HP-UX File System Types
File System
Type When Should I Use It? Additional Information
JFS (Journaled
File System)
Installed by default for
HP-UX 11.0. Recommended
for general purposes.
HP-UX implementation of a journaled
file system (JFS). Provides fast file
system recovery and the ability to
perform a variety of administrative
tasks online.
HFS (High
Performance
File System)
When you need
compatibility with earlier
HP-UX releases.
Represents HP-UX standard
implementation of the UNIX File
System (UFS).
NFS (Network
File System)
Use NFS to mount
directories from remote
systems.
NFS allows many systems to share the
same files by using a client/server
approach. Since access techniques are
transparent, remote file access appears
similar to local file access.
CDFS
(CD-ROM File
System)
Use CDFS to mount a
CD-ROM containing a file
system.
CDFS is a read-only file system; you
cannot write to a CDFS.
LOFS
(Loopback File
System)
Use LOFS to mount an
existing directory onto
another directory.
Allows the same file hierarchy to appear
in multiple places, which is useful for
creating copies of build and development
environments.