LSF supports job chunking, where jobs with similar resource requirements submitted by the same user are grouped together for dispatch. The CHUNK_JOB_SIZE parameter in lsb.queues and lsb.applications specifies the maximum number of jobs allowed to be dispatched together in a chunk job.
All of the jobs in the chunk are dispatched as a unit rather than individually. Job execution is sequential, but each chunk job member is not necessarily executed in the order it was submitted.
LSF provides a structure called a job array that allows a sequence of jobs that share the same executable and resource requirements, but have different input files, to be submitted, controlled, and monitored as a single unit. Using the standard LSF commands, you can also control and monitor individual jobs and groups of jobs submitted from a job array.
After the job array is submitted, LSF independently schedules and dispatches the individual jobs.