ARSC HPC Users' Newsletter Issue 431 2014-04-16

ARSC HPC Users' Newsletter Issue 431 2014-04-16

A publication of the Arctic Region Supercomputing Center.

1 Qmap Available on Fish

For users accessing the ARSC Cray XK6m-200 system (fish) and are awaiting their favorite queue visualization tool available on the ARSC Penguin cluster (pacman), we recently installed the qmap utility on fish. The qmap utility is similar to the xtnodestat command but is more colorful and provides a few more options for manipulating output.

fish3 ~ $ qmap --help

qmap [-c] [-h] [-j r|q] [-m] [-p] [-q] [-r] [-s] [-u username]

   -c include comments in the "Notes" section.
      This may indicate why a job is not starting.

   -h show this help dialog.

   -j [r|q]   (r) displays a table of running jobs.
              (q) displays a table of queued jobs.

   -m inactivates the node map display.

   -p prints only the node map display.

   -r lists the resources (queues), their current work load, and status.

   -u <username> displays a list of the given user's jobs.
       To select several users at one time, type the following:
       qmap -u <username> -u <username> -u <username>
       If no <username> is specified, the current user's jobs will be displayed.

       Find a bug? Email consult@arsc.edu. Thanks!

If you experience any problems running qmap, please submit a user support request.

2 Merger Announcement

A March 2014 article in the UAF Cornerstone announced the merger of ARSC into the UAF Geophysical Institute.

The Arctic Region Supercomputing Center is now a part of the Geophysical Institute at the University of Alaska Fairbanks.

ARSC's 21 employees, supercomputers and mass data storage devices now constitute another of the GI's operational facilities. Faculty, staff and students at ARSC will use the GI's administrative services, such as its business office and human resources, for their day-to-day business functions. These changes will streamline operations behind the scenes, but ARSC customers shouldn't notice any differences.

"We see them as a perfect fit to the GI's research mission of discoveries from the center of the Earth to the outer reaches of space," said Bob McCoy, GI director. "Over the coming months, I anticipate many opportunities for GI researchers and ARSC to work together more closely than we have, and, ultimately, we hope to strengthen collaborations between ARSC and the whole university."

The full article is available at uafcornerstone.net.

3 Alex St. John Lecture Online

Those who missed the recent lecture from Alex St. John, titled "The Rise of the Personal Supercomputer and the Latest from the Front Lines of CUDA", can view the recording on YouTube. The lecture took place on April 14 in IARC 501 and was hosted by UAF eLearning and Distance Education.

4 Allinea Webinar

We have arranged a Webinar with Beau Paisley from Allinea, to learn about the Allinea Unified Environment, an HPC debugging and profiling toolkit. The Webinar is scheduled for Thursday, April 24, at 10:00am (AST, GMT-08:00). Access is available through webex.com using the access code parallel.

5 Upcoming Training

Two presentations remain in the ARSC 2014 Spring Training series. These classes are open to all who are interested. All sessions are held in the ARSC Mac lab located in the West Ridge Research Building, room 009. No registration is required.

Intro. to Using the GIT Repository Kate Hedstrom Apr 18 2-4pm
Intro. to the R Programming Language Katrina Bennett Apr 25 2-4pm

6 Emacs, Vi, and Bash

The GNU Bash shell has Readline support, allowing Emacs-style key combinations to be used to edit the line of text being entered at the prompt.1

ctrl-a Move cursor to beginning of line
ctrl-e Move cursor to end of line
meta-b Move cursor back one word
meta-f Move cursor forward one word
ctrl-w Cut the last word
ctrl-u Cut everything before the cursor
ctrl-k Cut everything after the cursor
ctrl-y Paste the last thing to be cut
ctrl-_ Undo

(The META key is usually bound to ALT or ESC on modern keyboards.)

For those who prefer a different editor, Bash also supports Vi-style editing. This mode is not enabled by default, and must be activated with the set command.

set -o vi

This command can be included in your ${HOME}/.bashrc or ${HOME}/.bash_profile for automatic use.

Typing the escape key causes you to enter command mode:

h Move cursor left
l Move cursor right
A Move cursor to end of line and enter insert mode
0 Move cursor to beginning of line (doesn't enter insert mode)
i Enter insert mode at current position
a Enter insert mode after current position
dd Delete line (saved for pasting)
D Delete text after current cursor position (saved for pasting)
p Paste text that was deleted
j Move up through history commands
k Move down through history commands
u Undo

7 More Information

7.1 Editor

Christopher Howard mailto:cmhoward2@alaska.edu

7.2 Credits

Oralee Nudson, ARSC Lead User Consultant. Content reviewer and insider source for ARSC news and tips.

7.3 Publication Schedule

The newsletter is usually released on the third Wednesday of each month.

7.5 Archived Newsletters

7.6 Questions, Comments, and Submissions

mailto:owner-hpc_users@arsc.edu

Need advice? Submit a question about HPC or ARSC software, and we will feature it in a Q&A section in the newsletter.

Footnotes:

1

Our appreciation goes to hypexr.org for their highly-informative Bash tutorial. http://www.hypexr.org/bash_tutorial.php#set. Retrieved April 2014.

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