[torqueusers] pbs_server not keeping up

Tony Schreiner anthony.schreiner at bc.edu
Wed Aug 29 09:35:53 MDT 2012


On Aug 29, 2012, at 10:38 AM, Tony Schreiner wrote:

> On my smallish cluster with torque 2.5.7.
> 
> A user submitted about 8000 jobs to a routing queue, which feeds to an execution queue with 200 runnable slots.
> 
> At the moment, bps_server is unable to handle it,  pbsnodes returns no nodes found, qstat -q takes a long time and shows nothing.
> This is the tail of the latest server_logs file
> 
> 08/29/2012 10:26:03;0004;PBS_Server;Svr;check_nodes;node linux24 not detected in 1346250363 seconds, marking node down
> 08/29/2012 10:26:03;0004;PBS_Server;Svr;check_nodes;node linux25 not detected in 1346250363 seconds, marking node down
> 08/29/2012 10:26:03;0004;PBS_Server;Svr;check_nodes;node linux27 not detected in 1346250363 seconds, marking node down
> 08/29/2012 10:26:03;0004;PBS_Server;Svr;check_nodes;node linux29 not detected in 1346250363 seconds, marking node down
> 08/29/2012 10:26:40;0008;PBS_Server;Job;NULL;on_job_exit valid pjob: 0xe3d4180 (substate=51)
> 08/29/2012 10:27:18;0008;PBS_Server;Job;NULL;on_job_exit valid pjob: 0xe3d4180 (substate=51)
> 08/29/2012 10:27:18;000d;PBS_Server;Job;797357.portal;Post job file processing error; job 797357.portal on host linux29/1
> 08/29/2012 10:27:18;0008;PBS_Server;Job;NULL;on_job_exit valid pjob: 0xe3d4180 (substate=53)
> 08/29/2012 10:28:33;0004;PBS_Server;Svr;check_nodes;node linux20 not detected in 1346250513 seconds, marking node down
> 
> here are some server settings
> 
> set server log_events = 511
> set server mail_from = adm
> set server query_other_jobs = True
> set server resources_default.ncpus = 1
> set server resources_default.nodect = 1
> set server scheduler_iteration = 600
> set server node_check_rate = 150
> set server tcp_timeout = 6
> set server mom_job_sync = True
> set server keep_completed = 86400
> set server log_keep_days = 365
> set server next_job_number = 808497
> set server job_log_keep_days = 365
> 
> 
> is there anything I can change to help move things along.
> Thanks
> 
> Tony Schreiner

Addendum, it seems to have more to do with the number of entries in the server_priv/jobs directory. There were about 50,000 in there. When I deleted the older ones (about half), operation returned to normal. I'm going to reduce keep_completed, at least temporarily.

Tony



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