LSF Version 7.3 - Using Platform LSF HPC

This is the default allocation policy for RMS jobs.
LSF sorts nodes according to RMS topology (numbering of nodes and
domains), which takes precedence over LSF sorting order. LSF host
preferences (for example,
bsub -m hostA) are not taken into account.
The allocation is more compact than in RMS_SLOAD and starts from the
leftmost node allowed by the LSF host list and continues rightward until the
allocation specification is satisfied.
❖ RMS_SLOAD
Specifies sorted load allocation. Nodes do not need to be contiguous: gaps are
allowed between the leftmost and rightmost nodes of the allocation map.
LSF sorts nodes based on host preference and load information, which takes
precedence over RMS topology (numbering of nodes and domains).
The allocation starts from the first host specified in the list of LSF hosts and
continues until the allocation specification is satisfied.
❖ RMS_MCONT
Specifies mandatory contiguous node allocation. The allocation must be
contiguous: between the leftmost and rightmost nodes of the allocation map,
each node must either have at least one CPU which belongs to this allocation
OR this node must be configured out completely.
LSF sorts nodes based on RMS topological order (numbering of nodes and
domains); LSF host preferences (for example
bsub -m hostA+) are not
taken into account.
The allocation is more compact than in RMS_SNODE, so RMS_MCONT
provides the best job scheduling performance, but it requires contiguous nodes.
Allocation starts from the leftmost node that allows contiguous allocation.
Nodes that are out of service are not considered as gaps.
If you specify a CPU range
(
bsub -n min_processors , max_processors ), LSF builds a CPU
allocation on a first-fit basis. For example, if you specify
bsub -n 1,20, a
partition with an area at the beginning of the partition with 10 contiguous
CPUs, and another area at the end of the partition with 18 contiguous CPUs
has two areas that can fit the job. LSF places the job in the first area that satisfies
the minimum specification; in this case, LSF places the job at the beginning of
the partition.
◆ topology
Specifies the topology of the allocation: