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Goal:
Group together lsf jobs, "regression", in such a way that bsub -cluster feature directs all jobs in the group to the same cluster.
Proposal:
a) bsub submits all jobs in a job array to a single cluster
bsub -cluster all -J "ArrayName[1-10]" // LSF forwards ArrayName to initially best selected cluster for given resources
This is not sufficient by itself as a regression may contain a mix of arrays and single jobs.
b) bsub supports a cluster affinity tag
bsub -cluster all -clusterAffinityId=<UID> // LSF forwards all jobs with same id to same cluster
The first time LSF sees a new UID, it adds a mapping to a table
Every time a job is bsubbed, LSF increments the job_count associated with the UID
When a job is retired from LSF, LSF decrements the job_count
When job_count reaches zero, the mapping is removed.
Needed By | Quarter |
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There is no immediate solution to this requirement, although it does align with our longer term direction of modernizing multicluster. Michael Spriggs will continue to investigate this.