3.5.1 Matrix Server Administration Guide

Chapter 7: Configure PSFS Filesystems 126

on the Edit Persistent Mounts window, select the nodes where the

filesystem should be mounted and click Activate.

• For filesystems without a persistent mount, follow the normal

procedure to mount the filesystem as described under “Mount a

Filesystem” on page 105.

Context Dependent Symbolic Links

A Context Dependent Symbolic Link (CDSL) contains a keyword that

identifies a particular location. When the operating system resolves the

symbolic link, it translates the keyword into the appropriate pathname.

For example, a CDSL could contain the keyword

HOSTNAME, which

resolves to the hostname of the server where you are logged in.

A CDSL is created with the ln -s command. The symbolic link must be

located on a PSFS filesystem; however, the target can be on either a PSFS

or non-PSFS filesystem.

$ ln -s target_with_keyword link_name

Matrix Server supports the following keywords, which must be enclosed

in curly braces.

NOTE: CDSLs will not work if they are accessed through NFS because

NFS resolves the link on the client.

HOSTNAME

Output from uname -n (the node’s network hostname).

MACH

Output from uname -m (the machine type).

Output from uname -s (the operating system name).

SYS

Concatenated output from uname -m and uname -s,

separated by an underscore (for example, i386_Linux).

UID

The effective UID of the process accessing the link. The

UID refers to the numerical UID, not the user name.

GID

The effective GID of the process accessing the link. The

GID refers to the numerical GID, not the group name.