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When should you select a VSAM file over a normal Sequential file?

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There are a number of scenarios in which a VSAM file would be preferred over a Sequential file. Here are a few:

  • When performing multiple operations on a file based on a specific key value.
  • When performing multiple operations on a file, such as updating a specific record or removing files.
  • Whenever you need a file whose contents will need to be modified (update, delete, insert records) frequently.
  • Where multiple operations are required like different ways of accessing records either sequentially, with a key, or dynamically.

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