What Is Freespace in Vsam?

FREESPACE(CI-percent, CA-percent) specifies the percentage of each control interval and control area that is to be set aside as free space when the cluster is initially loaded, during a mass insert, and after any split of control intervals (CI-percent) and control areas (CA-percent).

What is the use of Freespace in KSDS?

Free space improves performance by reducing the likelihood of control interval and control area splits. This, in turn, reduces the likelihood of VSAM moving a set of records to a different cylinder away from other records in the key sequence.

What is base cluster in VSAM?

The base cluster consists of the data component and the index component for the primary index of a KSDS. ... What is an Alternate index? An AIX is a file that allows access to a VSAM dataset by a key other than the primary one.