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  1. We reserve ~12GB of RAM per host for the operating system and GPFS on Juno CentOS 7 hosts.
  2. On each jx## node (CentOS 7, GPFS installed), 240GB of RAM is available for LSF jobs.
  3. On each ju## node (CentOS 6, no GPFS), 250GB of RAM is available for LSF jobs.
  4. When specifying RAM for LSF jobs, specify GB of RAM per slot/task on Juno, or per job on Luna.
  5. All jobs must have -W (maximum Walltime) specified on Juno. Please do not use -We on Juno.
  6. To check jobs which are DONE or status EXIT, use "`bhist bhist -l JobID`JobID" or "`bhist bhist -n 0 -l JobID`JobID". `bacct` bacct is also available. "`bjobs bjobs -l JobID`JobID" only shows `RUNNING` RUNNING and `PEND` PEND jobs.
  7. There is no ` /swap` swap on CentOS 7 nodes. Memory usage is enforced by cgroups, so job never use ` /swap`swap. A job will be terminated if memory usage exceeds its LSF specification.
  8. There is no `iounits` iounits resource on Juno.

Queues

The Juno cluster uses LSF (Load Sharing Facility) 10.1  FP6 from IBM to schedule jobs. The default LSF queue, ‘general’, includes all Juno compute nodes.

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