HP JFS 3.3 and HP OnLineJFS 3.3 VERITAS File System 3.3 System Administrator's Guide

20 Chapter1
The VxFS File System
JFS and OnLineJFS Feature Comparison
JFS and OnLineJFS Feature Comparison
HP-UX supports two separate Journaled File System products: the basic
product, JFS, which is built into the HP-UX operating system, and the
optional, advanced product, OnLineJFS, which is purchased separately.
The following table lists VxFS file system features supported in JFS 3.3
and OnLineJFS 3.3.
VxFS supports all UFS file system features and facilities except for the
linking, removing, or renaming of “.” and “..” directory entries. Such
operations may disrupt file system sanity.
Table 1-1 VxFS File System Feature Comparison
Feature JFS 3.3 OnLineJFS 3.3
extent-based allocation * *
extent attributes * *
fast file system recovery * *
access control list (ACL) support * *
enhanced application interface * *
enhanced mount options * *
improved synchronous write performance * *
support for large files (up to one terabyte) * *
support for large file systems (up to one terabyte) * *
enhanced I/O performance * *
support for BSD-style quotas * *
unlimited number of inodes * *
file system tuning [vxtunefs(1M)] * *
online administration *
ability to reserve space for a file and set fixed extent
sizes and allocation flags
*
online snapshot file system for backup *
direct I/O, supporting improved database performance *
data synchronous I/O *
DMAPI *