Administering Platform LSF - SAS

Changing Default LIM Behavior to Improve Performance
LSF_MASTER_LIST
Defined
When LSF_MASTER_LIST is defined, LSF only rejects candidate master hosts
listed in LSF_MASTER_LIST from the cluster if:
◆ The number of load indices in lsf.cluster.cluster_name or
lsf.shared for master candidates is different from the number of load
indices in the lsf.cluster.cluster_name or lsf.shared files of the
elected master.
A warning is logged in the log file lim.log.master_host_name and the
cluster continues to run, but without the hosts that were rejected.
If you want the hosts that were rejected to be part of the cluster, ensure the
number of load indices in lsf.cluster.cluster_name and lsf.shared
are identical for all master candidates and restart LIMs on the master and all
master candidates:
% lsadmin limrestart hostA hostB hostC
LSF_MASTER_LIST defined, and master host goes down
If LSF_MASTER_LIST is defined and the elected master host goes down, and if
the number of load indices in lsf.cluster.cluster_name or lsf.shared
for the new elected master is different from the number of load indices in the
files of the master that went down, LSF will reject all master candidates that do
not have the same number of load indices in their files as the newly elected
master. LSF will also reject all slave-only hosts. This could cause a situation in
which only the newly elected master is considered part of the cluster.
A warning is logged in the log file lim.log.new_master_host_name and
the cluster continues to run, but without the hosts that were rejected.
To resolve this, from the current master host, restart all LIMs:
% lsadmin limrestart all
All slave-only hosts will be considered part of the cluster. Master candidates
with a different number of load indices in their
lsf.cluster.cluster_name or lsf.shared files will be rejected.
When the master that was down comes back up, you will have the same
situation as described in “LSF_MASTER_LIST Defined” on page 490. You will
need to ensure load indices defined in lsf.cluster.cluster_name and
lsf.shared for all master candidates are identical and restart LIMs on all
master candidates.
490
Administering Platform LSF