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<H1><FONT SIZE=6 STYLE="font-size: 28pt">Scheduling Library</FONT></H1>
<H1>Overview</H1>
<P>This library contains important high- and low-level functions
mainly used by Schedd, some of the functions contained herein however
have been proven to be used as well by clients like qstat, qhost or
qmon, but also by qmaster. For a comprehensive functional
segmentation of the schedulers source code refer to the <A HREF="../../daemons/schedd/schedd.html">schedd
documentation</A>.</P>
<H1>Reusable low-level building blocks</H1>
<P>The scheduling library contains some functions that can be reused.
Here is a description about their semantics:</P>
<UL>
<LI><P>host list sorting</P>
<P>Function <I>sort_host_list() </I><SPAN STYLE="font-style: normal">sorts
the host list according to the load_formula (see manual page
sched_conf(5)). It takes into account the adjusted load situation
(see under 'job_load_adjustments' and 'load_adjustment_decay_time'
in sched_conf(5)) and the availability of consumable resources (see
under 'consumable' in complex(5)).</SPAN></P>
<LI><P STYLE="font-style: normal">check whether a queue is in
load/suspend alarm</P>
<P STYLE="font-style: normal">This is implemented in
<I>sge_load_alarm(). </I>The function takes into account the
adjusted load situation (see under 'job_load_adjustments' and
'load_adjustment_decay_time' in sched_conf(5)).</P>
<LI><P ALIGN=LEFT>verification whether a job matches a queue</P>
<P ALIGN=LEFT>This operation is implemented in
<I>sge_why_not_job2queue_static()</I><SPAN STYLE="font-style: normal">.
Please note that the purpose of this function is just to answer the
question whether a job in principle can be dispatched to a queue.
The pertinent conditions are things like access permissions, job
type or required resources, but it does not take into account
dynamically changing properties like current load situation or
availability of consumables.</SPAN></P>
<LI><P ALIGN=LEFT>verification whether a job matches a host</P>
<P ALIGN=LEFT STYLE="font-style: normal">This operation is
implemented in <I>sge_why_not_job2host()</I>. This can be seen as
the counter-part of <I>sge_why_not_job2queue_static() </I>checking
for suitable hosts instead of queues and the same restrictions
apply.</P>
</UL>
<P ALIGN=CENTER STYLE="text-decoration: none">Copyright 2001 Sun
Microsystems, Inc. All rights reserved.</P>
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