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Sam
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Joined: 07/01/2026, 02:30 PM
Posted: 07/28/2026, 11:13 AM
Heard KSDS / ESDS / RRDS. Is VSAM like DB2 or more like a fancy file?
Heard KSDS / ESDS / RRDS. Is VSAM like DB2 or more like a fancy file?
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.
You will use both. Do not try to make VSAM into DB2 in your head.
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