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Explain In Brief What Are The 3 Types Of Vsam Files?

Answer»

Below are the 3 types of VSAM files.

  1. ESDS (Entry sequenced dataset). DB2 uses a SPECIAL type of ESDS.
  2. RRDS (RELATIVE record dataset). Records are accessed using a relative number.
  3. KSDS (Key sequenced dataset) is the most common type encountered. The record SEQUENCE is DETERMINED by a unique key FIELD.

Below are the 3 types of VSAM files.



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