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10.4resourceusagelimits.html
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10.4resourceusagelimits.html
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Maui Scheduler
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<h1><a name="resourcelimits" id="resourcelimits"></a>10.4 Resource Usage Limits</h1>
<p>Resource usage limits constrain the amount of resources a given job may consume. These limits are generally proportional to the resources requested and may include walltime, any standard resource, or any specified generic resource. The parameter <a href="a.fparameters.html#resourcelimitpolicy">RESOURCELIMITPOLICY</a> controls which resources are limited, what limit policy is enforced per resource, and what actions the scheduler should take in the event of a policy violation.</p>
<p>The <b>RESOURCELIMITPOLICY</b> parameter accepts a number of policies and actions defined in the tables below.</p>
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<td><b>Policy</b></td>
<td><b>Description</b></td>
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<td><b>ALWAYS</b></td>
<td>take action whenever a violation is detected</td>
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<td><b>EXTENDEDVIOLATION</b></td>
<td>take action only if a violation is detected and persists for greater than the specified timelimit</td>
</tr><!--<tr><td><b>BLOCKEDWORKLOADONLY</b><td>take action only if a violation is detected and the constrained resource is required by another job</tr>-->
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<td><b>Action</b></td>
<td><b>Description</b></td>
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<td><b>CANCEL</b></td>
<td>terminate the job</td>
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<td><b>REQUEUE</b></td>
<td>terminate and requeue the job</td>
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<td><b>SUSPEND</b></td>
<td>suspend the job and leave it suspended for an amount of time defined by the <b>X</b> parameter</td>
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<h2>Constraining Walltime Usage</h2><!-- While Maui constrains walltime using the parameter <b>RESOURCELIMITPOLICY</b> like other resources, it also allows walltime exceptions which are not available with other resources.-->Early releases of Maui 3.2 allowed jobs to exceed the requested wallclock limit by an amount specified on a global basis using the <a href="a.fparameters.html#jobmaxoverrun">JOBMAXOVERRUN</a> parameter or on a per class basis using the <a href="a.fparameters.html#classcfg"><b>CLASSCFG</b></a> parameter's <b>OVERRUN</b> attribute. Later releases of 3.2 allowed the <b>OVERRUN</b> attribute to be associated with any job credential.
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