Post #1
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Sam
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Joined: Jul 1, 2026, 2:30 PM
Posted: Jul 28, 2026, 11:13 AM
Heard KSDS / ESDS / RRDS. Is VSAM like DB2 or more like a fancy file?
Thread: General
What is VSAM? Is it a database?
Started by Sam • user3 replies263 viewsLast activity 2 weeks ago
Post #2
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Val
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Joined: Nov 22, 2024, 8:19 AM
Posted: Jul 28, 2026, 1:13 PM
Fancy file system, not a relational database. No SQL.
KSDS = keyed (what most people mean). ESDS = entry sequence. RRDS = relative record.
DB2 is tables and SQL. VSAM is records and keys. Both show up in the same shops for decades.
Post #3
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Elena
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Joined: Apr 18, 2024, 9:30 AM
Posted: Jul 28, 2026, 6:13 PM
You will use both. Do not try to make VSAM into DB2 in your head.
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