LSF Version 7.3 - Platform LSF Configuration Reference

If host groups and host partitions are included in the list, the job can run on any host in the
group or partition. All the members of the host list should either belong to a single host
partition or not belong to any host partition. Otherwise, job scheduling may be affected.
Some items can be followed by a plus sign (+) and a positive number to indicate the preference
for dispatching a job to that host. A higher number indicates a higher preference. If a host
preference is not given, it is assumed to be 0. If there are multiple candidate hosts, LSF
dispatches the job to the host with the highest preference; hosts at the same level of preference
are ordered by load.
If host groups and host partitions are assigned a preference, each host in the group or partition
has the same preference.
Use the keyword others to include all hosts not explicitly listed.
Use the keyword all to include all hosts not explicitly excluded.
Use the keyword all@cluster_name hostgroup_name or allremote hostgroup_name to include
lease in hosts.
Use the not operator (~) to exclude hosts from the all specification in the queue. This is useful
if you have a large cluster but only want to exclude a few hosts from the queue definition.
The not operator can only be used with the all keyword. It is not valid with the keywords
others and none.
The not operator (~) can be used to exclude host groups.
For parallel jobs, specify first execution host candidates when you want to ensure that a host
has the required resources or runtime environment to handle processes that run on the first
execution host.
To specify one or more hosts or host groups as first execution host candidates, add the
exclamation point (!) symbol after the host name.
Follow these guidelines when you specify first execution host candidates:
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If you specify a host group, you must first define the host group in the file lsb.hosts.
•
Do not specify a dynamic host group as a first execution host.
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Do not specify “all,” "allremote," or “others,” or a host partition as a first execution host.
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Do not specify a preference (+) for a host identified by (!) as a first execution host candidate.
•
For each parallel job, specify enough regular hosts to satisfy the CPU requirement for the
job. Once LSF selects a first execution host for the current job, the other first execution
host candidates
•
Become unavailable to the current job
•
Remain available to other jobs as either regular or first execution hosts
•
You cannot specify first execution host candidates when you use the brun command.
With MultiCluster resource leasing model, use the format host_name@cluster_name to specify
a borrowed host. LSF does not validate the names of remote hosts. The keyword others
indicates all local hosts not explicitly listed. The keyword all indicates all local hosts not
explicitly excluded. Use the keyword allremote to specify all hosts borrowed from all remote
clusters. Use all@cluster_name to specify the group of all hosts borrowed from one remote
cluster. You cannot specify a host group or partition that includes remote resources, unless it
uses the keyword allremote to include all remote hosts.
With MultiCluster resource leasing model, the not operator (~) can be used to exclude local
hosts or host groups. You cannot use the not operator (~) with remote hosts.
lsb.queues
292 Platform LSF Configuration Reference