Shows what resources are available for immediate use. NOTE: if specific information is not specified, showbf will return information for the user and group running but with global access for other fields. For example, if '-q <QOS>' is not specified, Maui will return backfill information for a job which could magically access all QOS based resources (ie, resources covered by reservations with a QOS based ACL), if '-c <CLASS>' is not specifed, it will return the info for resources accessible to any class.
This command can be run by any user.
This command can be used by any user to find out how many processors are available for immediate use on the system. It is anticipated that users will use this information to submit jobs that meet these criteria and thus obtain quick job turnaround times. This command incorporates down time, reservations, and node state information in determining the available backfill window.
backFill window (user: 'john' group: 'staff' partition: ALL) Mon Feb 16 08:28:54 partition Fast: 9 procs available for 4:54:18 partition Slow: 34 procs available for 10:25:30 26 procs available for 7:00:19 1 proc available with no timelimit
In this example, a job requiring up to 34 processors could be submitted for immediate execution in partition 2 as long as it required less than 10 hours, 25 minutes. Likewise, jobs requiring up to 26 processors that complete in less than 7 hours could also run in partition Slow. A single-processor job with arbitrary wallclock limits could also run in this partition.
In this example, the window is specifically for user john in group staff. This information is important because processors can be reserved for particular users and groups, thus causing backfill windows to be different for each person. Backfill window information for a non-default user, group, and/or account can be displayed using the -u, -g, and -a flags, respectively. A backfill window with global user, group, and account access can be displayed using the -A flag.
% showbf -r 16 -d 3:00:00
backFill window (user: 'john' group: 'staff' partition: ALL) Mon Feb 16 08:28:54
partition ALL: 33 procs available with no time limit
% showbf -m '>=512'
backfill window (user: 'john' group: 'staff' partition: ALL) Thu Jun 18 16:03:04 no procs available
In this example, a resource availability window is requested for processors located only on nodes with at least 512 MB of memory. In the example above, the command output reports that no processors are available for immediate use which meet this constraint.
Use the showq command to show jobs in the various queues.
Use the diagnose command to show the partitions.
|© 2001-2010 Adaptive Computing Enterprises, Inc.|