Peyton Hall Documentation - Recent changes [en]

http://www.astro.princeton.edu/wiki/index.php?title=Special:RecentChanges&feed=atom Peyton Hall Documentation - Recent changes [en] 2009-11-21T00:54:50Z Track the most recent changes to the wiki in this feed. MediaWiki 1.13.2 http://www.astro.princeton.edu/wiki/index.php?title=Hardware&diff=1036&oldid=prev Hardware 2009-11-19T16:49:05Z

<p>Clarifying 'dept' users</p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">←Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 16:49, 19 November 2009</td> </tr> <tr><td colspan="2" class="diff-lineno">Line 11:</td> <td colspan="2" class="diff-lineno">Line 11:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>:# For security reasons, the above link will not work unless you're plugged in to the Peyton Hall network directly (not even over wireless in the building).</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>:# For security reasons, the above link will not work unless you're plugged in to the Peyton Hall network directly (not even over wireless in the building).</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>:# The "primary user" field usually lists the person or group who owns the machine; this may be because they bought the machine themselves, or in the case of graduate student desktops they are the primary user (it's in their office).  If you want to run something on one of these machines, and cannot run your job through Condor, you must ask that person first if you may do so.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>:# The "primary user" field usually lists the person or group who owns the machine; this may be because they bought the machine themselves, or in the case of graduate student desktops they are the primary user (it's in their office).  If you want to run something on one of these machines, and cannot run your job through Condor, you must ask that person first if you may do so.</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>:# If the primary user is "dept", the machine is owned by the department, and as a general rule anyone <del class="diffchange diffchange-inline">can use </del>them.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>:# If the primary user is "dept", the machine is owned by the department, and as a general rule anyone <ins class="diffchange diffchange-inline">could be using </ins>them<ins class="diffchange diffchange-inline">.  While there's a few general-purpose servers, many are desktops (undergraduates, visitors, postdocs who have not purchased their own machine and received an older used one, etc)</ins>.</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The recommended way to run jobs on any available machines is to use [[Condor]] to manage your processes.  This way, you can queue up multiple jobs which will be run on whatever machine is available at the time, and should a machine become used by its primary user the job will be moved off to another available host or held until something becomes idle.  Jobs that are run on department machines directly, not through [[Condor]], may be killed off without warning since they won't be nicely moved out of the way if an interactive user needs the machine.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The recommended way to run jobs on any available machines is to use [[Condor]] to manage your processes.  This way, you can queue up multiple jobs which will be run on whatever machine is available at the time, and should a machine become used by its primary user the job will be moved off to another available host or held until something becomes idle.  Jobs that are run on department machines directly, not through [[Condor]], may be killed off without warning since they won't be nicely moved out of the way if an interactive user needs the machine.</div></td></tr>  </table>

Huston http://www.astro.princeton.edu/wiki/index.php?title=Condor&diff=1035&oldid=prev Condor 2009-11-17T20:52:28Z

<p>condor_exec != evil</p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">←Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 20:52, 17 November 2009</td> </tr> <tr><td colspan="2" class="diff-lineno">Line 74:</td> <td colspan="2" class="diff-lineno">Line 74:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>=== Why does my job in the standard universe fail with "Job not properly linked for Condor" even though I compiled it with condor_compile? ===</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>=== Why does my job in the standard universe fail with "Job not properly linked for Condor" even though I compiled it with condor_compile? ===</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>While this can be related to a number of issues, so far the most common problem we've seen is compiling using the gcc <tt>-pg</tt> flag, which enables profiling support. Remove this flag from your compile options and recompile.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>While this can be related to a number of issues, so far the most common problem we've seen is compiling using the gcc <tt>-pg</tt> flag, which enables profiling support. Remove this flag from your compile options and recompile.</div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">=== Some user is running condor_exec and eating all my CPU! ===</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">When you see the "condor_exec" process running on a computer, this means that user's job was run through Condor.  Many of the machines on the network have multiple cores, so it's not uncommon to see 2-4 of these running at the same time.  As an example, if you're just browsing the web and doing some minor work, it's quite likely that three of the four cores on a quad-core machine are idle and available for Condor usage.  Just having other processes running doesn't mean your usage of the computer is degraded - in fact, many times you can't even tell it's there since you weren't using the power yourself.  If you start running other processes that need the CPU cores, Condor will automatically "vacate" the job off of your computer after a short delay (around five minutes or so).</ins></div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>  </table>

Huston