3.5.1 Matrix Server Administration Guide

Chapter 7: Configure PSFS Filesystems 110
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NOTE: This mount option should be used with extreme caution. When
cluster-coherent record lock operations are disabled, the record
locks established against a file in the filesystem by each node in
the cluster are invisible to all other nodes in the same cluster.
Before using this option, ensure that either all processes
performing record lock operations in the affected filesystem are
running on the same single node in the cluster, or that the
necessary mutual exclusion semantics for record locking have
been implemented in some other way. Note that this option affects
record locks obtained by the Linux fcntl system call. The Linux
flock system call is not affected.
Custom Mount Options: Specify any custom mount options, separated
by commas.
Mount a Filesystem from the Command Line
To mount a PSFS filesystem from the command line, use one of the
following commands.
The Matrix Server mx Command
Use this syntax:
mx fs mount --path <path> [--persist] [--activate] [--options
<option>,<option>,...] <storageDevice> ALL_SERVERS|<server> ...
The --persist argument causes the filesystem to be mounted
automatically whenever the server is rebooted. The --activate argument
mounts the filesystem now. The --path argument specifies the directory
mountpoint for the filesystem; if this mountpoint does not already exist,
include the
CREATEDIR option to create it.
The options are as follows:
•
RW/RO. Mount the filesystem read-write or read-only. RW is the
default.
•
ASYNC/ SYNC. The default, ASYNC, allows either asychronous or
synchronous I/O to the filesystem.
SYNC allows only synchronous I/O.
•
DEV/ NODEV. Interpret (or do not interpret) character or block special
devices on the filesystem.
DEV is the default.