LSF Version 7.3 - Administering Platform LSF

How application profiles interact with queue and job parameters
384 Administering Platform LSF
◆ Job chunking
◆ Advanced reservation
◆ SLA
◆ Slot reservation
◆ Backfill
Define a runtime estimate
Define the RUNTIME parameter at the application level. Use the bsub -We opion
at the job-level.
You can specify the runtime estimate as hours and minutes, or minutes only. The
following examples show an application-level runtime estimate of three hours and
30 minutes:
◆ RUNTIME=3:30
◆ RUNTIME=210
Configuring
normalized run
time
LSF uses normalized run time for scheduling in order to account for different
processing speeds of the execution hosts.
TIP: If you want the scheduler to use wall-clock (absolute) run time instead of normalized run
time, define ABS_RUNLIMIT=Y in the file lsb.params or in the file lsb.applications for
the application associated with your job.
LSF calculates the normalized run time using the following formula:
NORMALIZED_RUN_TIME = RUNTIME * CPU_Factor_Normalization_Host / CPU_Factor_Execute_Host
You can specify a host name or host model with the runtime estimate so that LSF
uses a specific host name or model as the normalization host. If you do not specify
a host name or host model, LSF uses the CPU factor for the default normalization
host as described in the following table.
To specify a host name (defined in
lsf.cluster.clustername) or host model
(defined in
lsf.shared) as the normalization host, insert the "/" character between
the minutes and the host name or model, as shown in the following examples:
RUNTIME=3:30/hostA
bsub -We 3:30/hostA
LSF calculates the normalized run time using the CPU factor defined for hostA.
RUNTIME=210/Ultra5S
bsub -We 210/Ultra5S
If you define… In the file… Then…
DEFAULT_HOST_SPEC lsb.queues LSF selects the default
normalization host for the
queue.
DEFAULT_HOST_SPEC
lsb.params LSF selects the default
normalization host for the
cluster.
No default host at either
the queue or cluster level
LSF selects the submission host
as the normalization host.