Adaptive Computing Engine Frame and Moab Demo

 Adaptive Computing Engine Frame and Moab Demo (YouTube (unlisted))

1. Batch Job Submission and Session Management  http://www.youtube.com/watch?v=i3Z5_Tz9Llk 
2. Multiple Desktop Request  http://www.youtube.com/watch?v=HUW1A7zwOW
3.  Multi-User and Multi-Session Use http://www.youtube.com/watch?v=glUgAhmhXp8 
4. Session Sharing http://www.youtube.com/watch?v=Cvcpgv71qYo 
5. Direct App Launch http://www.youtube.com/watch?v=WzKwlXTJ-WI 
6. DCV Demonstration, Multi-User Graphic Assignment http://www.youtube.com/watch?v=c1t9BBPtRoU

Module - Software Environment Management

For Academic Environment, this tool is especially useful to dynamically modified user environment via modulefiles

A good description of the module tool can be taken from the Sourceforge - Environment Modules Project.

"The Environment Modules package provides for the dynamic modification of a user's environment via modulefiles.

Each modulefile contains the information needed to configure the shell for an application. Once the Modules package is initialized, the environment can be modified on a per-module basis using the module command which interprets modulefiles. Typically modulefiles instruct the module command to alter or set shell environment variables such as PATH, MANPATH, etc. modulefiles may be shared by many users on a system and users may have their own collection to supplement or replace the shared modulefiles.

Modules can be loaded and unloaded dynamically and atomically, in an clean fashion. All popular shells are supported, including bash, ksh, zsh, sh, csh, tcsh, as well as some scripting languages such as perl.

Modules are useful in managing different versions of applications. Modules can also be bundled into metamodules that will load an entire suite of different applications."
More can be written on this.

1. The Modules Environment at the ITP Cluster

Understand parameters in /etc/fstab

Do look at the article form "Understand parameters in /etc/fstab" (linuxcluster.wordpress.com). Just a more indepth understanding of /etc/fstab parameters

Using qmgr to remove a queue attribute

To clear the queue attribute in qmgr, you should use the command "unset". For example, you wish to clear acl_users attribute

# qmgr -c "unset queue default_queue acl_users"

where -c = execute single command and exit qmgr.

You will notice that the attribute has been removed by verifying with this command

# qmgr -c "p s"

Using shutdown -h command to do a scheduled shutdown

If you wish to use the Linux command to remind users of scheduled maintenance and halts the system at 10:00am, you can use the command

# shutdown -h 10:00 "Scheduled Maintenance. Expected downtime at 10am"

Alternatively, you may wish to specify a relative downtime. If you wish to shutdown the system 20min when the command is executed

# shutdown -h +20 "We need to power down to do an emergency repair"