3.1.2 Matrix Server Administration Guide

Configure PSFS Filesystems

PolyServe Matrix Server provides the PSFS filesystem. This direct-access

shared filesystem enables multiple servers to concurrently read and write

data stored on shared SAN storage devices. A journaling filesystem, PSFS

provides live crash recovery.

Overview

Filesystem Features

Concurrent Access by Multiple Servers

After a PSFS filesystem has been created, all matrix servers having access

to the device via the SAN can mount the filesystem and subsequently

perform concurrent read and/or write operations to that filesystem. A

PSFS filesystem must be consistently mounted either read-only or read-

write across the matrix.

Standard Filesystem Operations and Semantics

The PSFS filesystem is a standard Linux filesystem and supports

standard filesystem operations such as mkfs, mount, and umount. These

operations can be performed either with the Management Console or

from the command line.

The PSFS filesystem also supports existing applications. It uses standard

read/write semantics and does not require any changes to applications.