Platform LSF Administration Guide Version 6.2

What’s New in the Platform LSF Version 6.2
Administering Platform LSF
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◆ For estimated start time, after making reservation, scheduler sorts all running jobs
in ascending order based on their finish time and goes through this sorted job list
to add up slots used by each running job till it satisfies minimal job slots request.
The finish time of last visited job will be job estimated start time
Reservation decisions made by greedy slot reservation will not have the accurate
estimated start time and future allocation information. The calculated job start time used
for backfill scheduling is uncertain, so
bjobs displays:
Job will start no sooner than indicated time stamp
New SGI cpuset
integration
The LSF integration for SGI cpusets has been rearchitected for improved topology
awareness:
◆ The Platform LSF HPC topology adapter (RLA) daemon rla replaces the
topology scheduling daemon
topd
◆ schmod_cpuset.so plugin replaces schmod_topology.so plugin
◆ The elim.cpuset ELIM is no longer used
◆ New command: brlainfo to display host topology information
◆ Modified bsub -ext CPUSET[] syntax replaces -ext SGI_CPUSET[] syntax
Jobs submitted with Platform LSF HPC cpuset options run within their own cpuset
ensuring that impact between jobs is minimal.
New MPI
integrations
MVAPICH and Intel MPI are now supported in Platform's generic PJL (parallel job
launcher) framework.
◆ MVAPICH
MVAPICH is an open-source product developed in the Department of Computer
and Information Science, The Ohio State University. MVAPICH is MPI-1 over
VAPI for InfiniBand. It is an MPI-1 implementation. It is on Verbs Level Interface
(VAPI), developed by Mellanox Technologies. The implementation is based on
MPICH and MVICH. The latest release is MVAPICH 0.9.4 (includes MPICH
1.2.6).
The LSF MVAPICH MPI integration has the following new components:
❖ esub.mvapich—sets the mode: rsh ssh or mpd
❖ mvapich_wrapper
lsfinstall
adds the mvapich Boolean resource to lsf.shared when
ENABLE_HPC_INST=Y is set in
install.config at installation.
Use
bsub -a mvapich to submit jobs:
% bsub -a mvapich bsub_options mpirun.lsf ...
MVAPICH supports the LSF task geometry feature except in MPD mode. When
running in MPD mode, the order of the hosts specified in the machine file is not
honored. If the starting command is
mpd, you must submit your MVAPICH jobs as
exclusive jobs (
bsub -x).
◆ Intel MPI