Modern Mainframe Development by Tom Taulli

Author:Tom Taulli [Tom Taulli]
Language: eng
Format: epub, pdf
Publisher: O'Reilly Media, Inc.
Published: 2022-05-24T16:00:00+00:00

KEY: This is the index and it can have up to 255 characters. You refer to this as KEY (length, offset). The length represents the number of characters for the index and the offset is the position you start from. For example, suppose the index is an employee number and it has six characters. In the VSAM key, you will look at the last four. This means we will have KEY (4, 2).

FREESPACE: This is the amount of space for each CI. It is for when you need to insert new records into the VSAM file. The syntax is FREESPACE (CI percentage, CA percentage) and an example is FREESPACE (20, 25). Moreover, if the FREESPACE is used up, IDCAMS will then split the IC to make more room.

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