NAME¶
sge_aliases - Sun Grid Engine path aliases file format
DESCRIPTION¶
The Sun Grid Engine path aliasing facility provides administrators and users
with the means to reflect complicated and in-homogeneous file system
structures in distributed environments (such as user home directories mounted
under different paths on different hosts) and to ensure that Sun Grid Engine
is able to locate the appropriate working directories for executing batch
jobs.
There is a system global path aliasing file and a user local file.
sge_aliases defines the format of both:
- •
- Blank lines and lines with a '#' sign in the first column
are skipped.
- •
- Each line other than a blank line or a line lead by '#' has
to contain four strings separated by any number of blanks or tabs.
- •
- The first string specifies a source-path, the second a
submit-host, the third an execution-host and the fourth the source-path
replacement.
- •
- Both the submit- and the execution-host entries may consist
of only a '*' sign which matches any host.
If the
-cwd flag (and only if - otherwise the user's home directory on
the execution host is selected to execute the job) to was specified, the path
aliasing mechanism is activated and the files are processed as follows:
- •
- After has retrieved the physical current working directory
path, the cluster global path aliasing file is read if present. The user
path aliases file is read afterwards as if it were appended to the global
file.
- •
- Lines not to be skipped are read from the top of the file
one by one while the translations specified by those lines are stored if
necessary.
- •
- A translation is stored only if the submit-host entry
matches the host is executed on and if the source-path forms the initial
part either of the current working directory or of the source-path
replacements already stored.
- •
- As soon as both files are read the stored path aliasing
information is passed along with the submitted job.
- •
- On the execution host, the aliasing information will be
evaluated. The leading part of the current working directory will be
replaced by the source-path replacement if the execution-host entry of the
path alias matches the executing host. Note: The current working
directory string will be changed in this case and subsequent path aliases
must match the replaced working directory path to be applied.
EXAMPLES¶
The following is a simple example of a path aliasing file resolving problems
with in-homogeneous paths if is used:
=====================================================
# Path Aliasing File
# src-path sub-host exec-host replacement
/tmp_mnt/ * * /
# replaces any occurrence of /tmp_mnt/ by /
# if submitting or executing on any host.
# Thus paths on nfs server and clients are the same
=====================================================
FILES¶
<sge_root>/<cell>/common/sge_aliases
global aliases file
$HOME/.sge_aliases user local aliases file
SEE ALSO¶
Sun Grid Engine Installation and Administration Guide
COPYRIGHT¶
See for a full statement of rights and permissions.