Post #1
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Jordan
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Joined: May 2, 2026, 11:10 AM
Posted: Jul 26, 2026, 1:36 PM
People say "put it in a PDS member." Is a PDS like a folder? And a sequential file is just one long file?
Thread: TSO and ISPF
PDS vs sequential file - what is the difference?
Started by Jordan • user3 replies213 viewsLast activity 2 weeks ago
Post #2
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Susan
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Joined: Jan 19, 2025, 4:12 PM
Posted: Jul 26, 2026, 2:36 PM
Pretty much. PDS (or PDSE) = library with members. Sequential (PS) = one dataset, no members.
Source code usually lives in PDS members. Big data files are often sequential or VSAM.
Post #3
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Bill
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Joined: Aug 28, 2024, 7:08 AM
Posted: Jul 27, 2026, 3:36 PM
PDSE is the newer flavor. Same idea for most beginner work.
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