LSF Version 7.3 - Platform LSF Configuration Reference

lsf.task
Users should not have to specify a resource requirement each time they submit a job. LSF supports the concept of a
task list. This chapter describes the files used to configure task lists: lsf.task, lsf.task.cluster_name,
and .lsftask.
Changing task list configuration
After making any changes to the task list files, run the following commands:
•
lsadmin reconfig to reconfigure LIM
•
badmin reconfig to reload the configuration files
About task lists
A task list is a list in LSF that keeps track of the default resource requirements for different
applications and task eligibility for remote execution.
The term task refers to an application name. With a task list defined, LSF automatically supplies
the resource requirement of the job whenever users submit a job unless one is explicitly
specified at job submission.
LSF takes the job's command name as the task name and uses that name to find the matching
resource requirement for the job from the task list. If a task does not have an entry in the task
list, LSF assumes the default resource requirement; that is, a host that has the same host type
as the submission host will be chosen to run the job.
An application listed in a task file is considered for load sharing by its placement in either the
local tasks or remote tasks list.
•
A local task is typically an application or command that it does not make sense to run
remotely such as ls.
•
A remote task is an application or command that can be run on another machine in the
LSF cluster. The compress command is an example of a remote task.
Some applications require resources other than the default. LSF can store resource
requirements for specific applications in remote task list files, so that LSF automatically
chooses candidate hosts that have the correct resources available.
For frequently used commands and software packages, the LSF administrator can set up
cluster–wide resource requirements that apply to all users in the cluster.
Users can modify and add to these requirements by setting up additional resource
requirements that apply only to their own jobs.
Cluster-wide resource requirements
The resource requirements of applications are stored in the remote task list file.
LSF automatically picks up a job’s default resource requirement string from the remote task
list files, unless you explicitly override the default by specifying the resource requirement string
on the command line.
User-level resource requirements
You may have applications that you need to control yourself. Perhaps your administrator did
not set them up for load sharing for all users, or you need a non-standard setup. You can use
lsf.task
Platform LSF Configuration Reference 541