Administering Platform LSF - SAS

Chapter 1
About Platform LSF
Master LIM
ELIM
pim
The LIM running on the master host. Receives load information from the LIMs
running on hosts in the cluster.
Forwards load information to mbatchd, which forwards this information to
mbschd to support scheduling decisions. If the master LIM becomes
unavailable, a LIM on another host automatically takes over.
Commands
◆ lsadmin limstartup—Starts lim
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lsadmin limshutdown—Shuts down lim
lsadmin limrestart—Restarts lim
lsload—View dynamic load values
lshosts—View static host load values
Configuration
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Port number defined in lsf.conf.
External LIM (ELIM) is a site-definable executable that collects and tracks
custom dynamic load indices. An ELIM can be a shell script or a compiled
binary program, which returns the values of the dynamic resources you define.
The ELIM executable must be named elim and located in LSF_SERVERDIR.
Process Information Manager running on each server host. Started by LIM,
which periodically checks on pim and restarts it if it dies.
Collects information about job processes running on the host such as CPU and
memory used by the job, and reports the information to sbatchd.
Commands
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Batch jobs and tasks
Job
Interactive batch
job
bjobs—View job information
You can either run jobs through the batch system where jobs are held in
queues, or you can interactively run tasks without going through the batch
system, such as tests for example.
A unit of work run in the LSF system. A job is a command submitted to LSF for
execution, using the bsub command. LSF schedules, controls, and tracks the
job according to configured policies.
Jobs can be complex problems, simulation scenarios, extensive calculations,
anything that needs compute power.
Commands
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bjobs—View jobs in the system
bsub—Submit jobs
A batch job that allows you to interact with the application and still take
advantage of LSF scheduling policies and fault tolerance. All input and output
are through the terminal that you used to type the job submission command.
When you submit an interactive job, a message is displayed while the job is
awaiting scheduling. A new job cannot be submitted until the interactive job is
completed or terminated.
Administering Platform LSF 35