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Improving job status problem due to defunct process
Sometimes, defunct can occur in job processes for a variety of reasons. For example, 29460 below is one of the processes of some job. ps -ef | grep bg92
bg92.pa+ 29460 1 1 2022 ? 08:03:02 [Novas] <defunct> And if a defunct process occurs, L...
hostcache auto-delete function in the mbatchd restart
Dynamic hosts remain in the cluster unless you intentionally remove them.And the manual related to it is as follows.https://www.ibm.com/docs/en/spectrum-lsf/10.1.0?topic=cluster-remove-dynamic-hostsSuppose we delete the hostcache file, not modify ...
Have LSF Handle ZOMBI job searching using either BTREE or HASH ALGO's
Large number of ZOMBI jobs can impact very large clusters operations resulting in high backlogs and additional lost job status. Improving the ZOMBI search algorithm from Linear Search to BTREE or HASH would reduce this impact.
Enhance the Support Tool to be able to remove ZOMBI jobs and create a log of exec hosts and pgids that need to be cleaned
We had an issue where LSF could not keep up with dispatch due to high numbers of ZOMBI jobs. We would like the ability to shut down LSF and clean up the ZOMBI jobs via a Database repair to accelerate the time-to-restore of the LSF clusters.
Make Queue Open/Close/Act/Inact 'all' Requests a single event
We recently had a serious issue that required us to close/inact all of our queues, and then perform a database repair using the IBM support tool. However, when we started LSF, all but one of the queues was Open/Act again. This was due to the suppo...
Make the TCP Backlog for the MBATCH and MBATCHD Query Port Configurable for Large Clusters
We have been monitoring the TCP backlogs for LIM, MBD, and the Query port for some time, and there are periods where the MBD query port becomes overloaded resulting in a higher than expected count of UNKNOWN and sometimes eventually ZOMBI jobs, an...
Add lsb.params setting to limit the number of times a job can be redispatched upon either a pre-exec failure of job initilization failure
We currently have jobs that will bounce from host to host either based upon a pre-exec failure, or a job initialization failure. This can impact > 500 hosts and cause an increase in MBD memory use. It would be nice to have a setting such as: MA...
Improve Job Priority Output to Exceed 1e6 as APS can easily increase Per Job Priority above that value
There is currently a system limitation that Job Priories above 1e6 do not display correctly when using bjobs -o "blah" formatted output. This is currently causing us a monitoring issue when attempting to order jobs with a very high dynamic priorit...
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