Maui's early style throttling policies are controlled via a large number of independent parameters.  Throttling policies control and constrain instantaneous resource usage.  They would, for example, allow a site to limit a user to running only 6 jobs at any given time or prevent a group from utilizing more than 40 total processors at any given time.  They DO NOT control historical usage.  This is handled using Maui's Fairshare facility.  Also, unlike Maui 3.0.7 and higher, early style throttling did not allow credential specific limits.

    Subject to the above constraints, Maui's early throttling policy facility is still a very useful tool in establishing fair
resource usage and may be used in conjunction with Fairshare, QOS, and Priority features to establish significant control over cluster behavior.  The table below lists the parameters associated with Maui's early style throttling.

NOTE:  In all cases, three parameters are grouped together.  The first, 'MAX*POLICY' must be set to ON in order for the policy to be enforced.  The second, 'MAX*COUNT', constrains the 'hard limit' which the scheduler must never violate under any conditions.  The third, 'SMAX*COUNT', is called a 'soft limit' and if specified, will set a lower, more constraining limit which the scheduler should never violate unless no other jobs are available.
 

Parameter	Details	Example
MAXJOBPERUSERPOLICY MAXJOBPERUSERCOUNT SMAXJOBPERUSERCOUNT	limits the maximum total number of jobs any given user may have active (running) simultaneously	MAXJOBPERUSERPOLICY ON MAXJOBPERUSERCOUNT 4 (allow each user to run up to 4 jobs simultaneously)
MAXPROCPERUSERPOLICY MAXPROCPERUSERCOUNT SMAXPROCPERUSERCOUNT	limits the maximum total number of processors any given user may have active (allocated to running jobs) simultaneously	MAXPROCPERUSERPOLICY ON MAXPROCPERUSERCOUNT 32 (allow each user to utilize up to 32 processors simultaneously)
MAXNODEPERUSERPOLICY MAXNODEPERUSERCOUNT SMAXNODEPERUSERCOUNT	limits the maximum total number of nodes any given user may have active (allocated to running jobs) simultaneously	MAXNODEPERUSERPOLICY ON MAXNODEPERUSERCOUNT 16 SMAXNODEPERUSERCOUNT 8 (allow each user to utilize up to 8 nodes simultaneously by default. If no other jobs can run and idle nodes are available, allow each user to utilize up to 16 nodes simultaneously.)
MAXPROCSECONDPERUSERPOLICY MAXPROCSECONDPERUSERCOUNT SMAXPROCSECONDPERUSERCOUNT	limits the maximum total number of processor-seconds any given user may have active (allocated to running jobs) simultaneously. NOTE: processor-seconds associated with any given job is calculated as PROCESSORS * REMAININGWALLTIME	MAXPROCSECONDPERUSERPOLICY ON MAXPROCSECONDPERUSERCOUNT 20000 (allow each user to utilize up to 20000 processor-seconds simultaneously)
MAXJOBQUEUEDPERUSERPOLICY MAXJOBQUEUEDPERUSERCOUNT SMAXJOBQUEUEDPERUSERCOUNT	limits the maximum total number of idle jobs associated with each user which Maui will consider eligible for scheduling	MAXJOBQUEUEDPERUSERPOLICY ON MAXJOBQUEUEDPERUSERCOUNT 3 (Maui will only consider 3 idle jobs per user in each scheduling iteration)
MAXPEPERUSERPOLICY MAXPEPERUSERCOUNT SMAXPEPERUSERCOUNT	limits the maximum total number of processor-equivalents any given user may have active (running) simultaneously	MAXPEPERUSERPOLICY ON MAXPEPERUSERCOUNT 48 (allow each user have up to 48 PE's allocated to active jobs simultaneously)
MAXJOBPERGROUPPOLICY MAXJOBPERGROUPCOUNT SMAXJOBPERGROUPCOUNT	limits the maximum total number of jobs any given group may have active (running) simultaneously	MAXJOBPERGROUPPOLICY ON MAXJOBPERGROUPCOUNT 4 (allow each group to run up to 4 jobs simultaneously)
MAXPROCPERGROUPPOLICY MAXPROCPERGROUPCOUNT SMAXPROCPERGROUPCOUNT	limits the maximum total number of processors any given group may have active (allocated to running jobs) simultaneously	MAXPROCPERGROUPPOLICY ON MAXPROCPERGROUPCOUNT 32 (allow each group to utilize up to 32 processors simultaneously)
MAXNODEPERGROUPPOLICY MAXNODEPERGROUPCOUNT SMAXNODEPERGROUPCOUNT	limits the maximum total number of nodes any given group may have active (allocated to running jobs) simultaneously	MAXNODEPERGROUPPOLICY ON MAXNODEPERGROUPCOUNT 16 SMAXNODEPERGROUPCOUNT 8 (allow each group to utilize up to 8 nodes simultaneously by default. If no other jobs can run and idle nodes are available, allow each group to utilize up to 16 nodes simultaneously.)
MAXPROCSECONDPERGROUPPOLICY MAXPROCSECONDPERGROUPCOUNT SMAXPROCSECONDPERGROUPCOUNT	limits the maximum total number of processor-seconds any given group may have active (allocated to running jobs) simultaneously. NOTE: processor-seconds associated with any given job is calculated as PROCESSORS * REMAININGWALLTIME	MAXPROCSECONDPERGROUPPOLICY ON MAXPROCSECONDPERGROUPCOUNT 20000 (allow each group to utilize up to 20000 processor-seconds simultaneously)
MAXJOBQUEUEDPERGROUPPOLICY MAXJOBQUEUEDPERGROUPCOUNT SMAXJOBQUEUEDPERGROUPCOUNT	limits the maximum total number of idle jobs associated with each group which Maui will consider eligible for scheduling	MAXJOBQUEUEDPERGROUPPOLICY ON MAXJOBQUEUEDPERGROUPCOUNT 3 (Maui will only consider 3 idle jobs per group in each scheduling iteration)
MAXPEPERGROUPPOLICY MAXPEPERGROUPCOUNT SMAXPEPERGROUPCOUNT	limits the maximum total number of processor-equivalents any given group may have active (running) simultaneously	MAXPEPERGROUPPOLICY ON MAXPEPERGROUPCOUNT 48 (allow each group have up to 48 PE's allocated to active jobs simultaneously)
MAXJOBPERACCOUNTPOLICY MAXJOBPERACCOUNTCOUNT SMAXJOBPERACCOUNTCOUNT	limits the maximum total number of jobs any given account may have active (running) simultaneously	MAXJOBPERACCOUNTPOLICY ON MAXJOBPERACCOUNTCOUNT 4 (allow each account to run up to 4 jobs simultaneously)
MAXPROCPERACCOUNTPOLICY MAXPROCPERACCOUNTCOUNT SMAXPROCPERACCOUNTCOUNT	limits the maximum total number of processors any given account may have active (allocated to running jobs) simultaneously	MAXPROCPERACCOUNTPOLICY ON MAXPROCPERACCOUNTCOUNT 32 (allow each account to utilize up to 32 processors simultaneously)
MAXNODEPERACCOUNTPOLICY MAXNODEPERACCOUNTCOUNT SMAXNODEPERACCOUNTCOUNT	limits the maximum total number of nodes any given account may have active (allocated to running jobs) simultaneously	MAXNODEPERACCOUNTPOLICY ON MAXNODEPERACCOUNTCOUNT 16 SMAXNODEPERACCOUNTCOUNT 8 (allow each account to utilize up to 8 nodes simultaneously by default. If no other jobs can run and idle nodes are available, allow each account to utilize up to 16 nodes simultaneously.)
MAXPROCSECONDPERACCOUNTPOLICY MAXPROCSECONDPERACCOUNTCOUNT SMAXPROCSECONDPERACCOUNTCOUNT	limits the maximum total number of processor-seconds any given account may have active (allocated to running jobs) simultaneously. NOTE: processor-seconds associated with any given job is calculated as PROCESSORS * REMAININGWALLTIME	MAXPROCSECONDPERACCOUNTPOLICY ON MAXPROCSECONDPERACCOUNTCOUNT 20000 (allow each account to utilize up to 20000 processor-seconds simultaneously)
MAXJOBQUEUEDPERACCOUNTPOLICY MAXJOBQUEUEDPERACCOUNTCOUNT SMAXJOBQUEUEDPERACCOUNTCOUNT	limits the maximum total number of idle jobs associated with each account which Maui will consider eligible for scheduling	MAXJOBQUEUEDPERACCOUNTPOLICY ON MAXJOBQUEUEDPERACCOUNTCOUNT 3 (Maui will only consider 3 idle jobs per account in each scheduling iteration)
MAXPEPERACCOUNTPOLICY MAXPEPERACCOUNTCOUNT SMAXPEPERACCOUNTCOUNT	limits the maximum total number of processor-equivalents any given account may have active (running) simultaneously	MAXPEPERACCOUNTPOLICY ON MAXPEPERACCOUNTCOUNT 48 (allow each account have up to 48 PE's allocated to active jobs simultaneously)