Sun Java System Application Server Enterprise Edition 8.1 2005Q2 High Availability Administration Guide

File System Support

This section describes some restrictions of HADB with certain file systems.

Red Hat Enterprise Linux

HADB supports the ext2 and ext3 file systems on Red Hat Enterprise Linux 3.0. For Red Hat Enterprise Linux 2.1, HADB supports the ext2 file system.

Veritas File System

When using the Veritas File System on Solaris, HADB writes the message WRN: Direct disk I/O mapping failed to the history files. This message indicates that HADB cannot turn on direct input/output (I/O) for the data and log devices. Direct I/O reduces the CPU cost of writing disk pages. It also reduces overhead of administering “dirty” data pages in the operating system.

To use direct I/O with Veritas File System, do one of the following:

Note –

These configurations have not been tested with the Sun Java System Application Server.