Difference between revisions of "Maui reservations"
| Line 21: | Line 21: | ||
1 reservation located | 1 reservation located | ||
| − | The 'Start' is '''always''' 00:00:00. | + | The 'Start' is '''always''' 00:00:00. The numbers of reserved nodes and processors are 2 and 8, respectively (why? we asked for 6 processors, right?). Anyway, submitting enough jobs to fill the entire cluster to another queue (i.e., outside the reservation) results in ''N''-2 running jobs. So apparently, Maui reserved only 2 cores for the short queue.... |
| − | + | Another shot, this time using the setres command (e.g. from a cron job). Again, we try to reserve 6 slots as 2 slots per node on 3 explicitly named nodes: | |
# /usr/bin/setres -n short -r "PROCS=2" -s 09:30:00 -e 18:30:00 -c short 'tbn(08|09|17).nikhef.nl' | # /usr/bin/setres -n short -r "PROCS=2" -s 09:30:00 -e 18:30:00 -c short 'tbn(08|09|17).nikhef.nl' | ||
| − | + | Maui has the following reservation: | |
# showres short.0 | # showres short.0 | ||
Reservations | Reservations | ||
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ReservationID Type S Start End Duration N/P StartTime | ReservationID Type S Start End Duration N/P StartTime | ||
| − | short.0 User - -01:53:06 7:06:54 9:00:00 3/6 Fri Jun 21 | + | short.0 User - -01:53:06 7:06:54 9:00:00 3/6 Fri Jun 21 09:30:00 |
1 reservation located | 1 reservation located | ||
| − | + | It is interesting to see that the start time is in the past and that the numbers of nodes and processors now match what we requested. | |
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| − | + | Again submitting enough jobs to fill the entire cluster to another queue, results in N-6 running jobs. That is exactly what was expected. | |
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Revision as of 09:49, 21 June 2013
Example: create a reservation for 6 cores for jobs submitted to the short queue on working days (Mon-Fri) from 9:30 to 18:30.
Using a standing reservation in Maui, the following fragment should be added to the configuration file /var/spool/maui/maui.cfg, followed by a restart of the maui daemon.
SRCFG[short] STARTTIME=9:30:00 ENDTIME=18:30:00 SRCFG[short] PERIOD=DAY DEPTH=3 SRCFG[short] DAYS=Mon,Tue,Wed,Thu,Fri SRCFG[short] TASKCOUNT=6 RESOURCES=PROCS:1 SRCFG[short] CLASSLIST=short
Maui creates a reservation:
# showres Reservations ReservationID Type S Start End Duration N/P StartTime short.0.0 User - 00:00:00 7:01:46 7:01:46 2/8 Fri Jun 21 11:28:14 1 reservation located
The 'Start' is always 00:00:00. The numbers of reserved nodes and processors are 2 and 8, respectively (why? we asked for 6 processors, right?). Anyway, submitting enough jobs to fill the entire cluster to another queue (i.e., outside the reservation) results in N-2 running jobs. So apparently, Maui reserved only 2 cores for the short queue....
Another shot, this time using the setres command (e.g. from a cron job). Again, we try to reserve 6 slots as 2 slots per node on 3 explicitly named nodes:
# /usr/bin/setres -n short -r "PROCS=2" -s 09:30:00 -e 18:30:00 -c short 'tbn(08|09|17).nikhef.nl'
Maui has the following reservation:
# showres short.0 Reservations ReservationID Type S Start End Duration N/P StartTime short.0 User - -01:53:06 7:06:54 9:00:00 3/6 Fri Jun 21 09:30:00 1 reservation located
It is interesting to see that the start time is in the past and that the numbers of nodes and processors now match what we requested.
Again submitting enough jobs to fill the entire cluster to another queue, results in N-6 running jobs. That is exactly what was expected.
