As a part of Listcat, used to calculate the recommended number of Index or Data buffers for a given operation, i.e., sequential, random, etc

To tell VSAM the parameters for Batch Update Function - Indexed (KSDS) or Batch Update Function - Data (ESDS) processing

To tell VSAM to use the default number of index and data component buffers

To allocate the number of index and data component buffers used