Post #1716452
2026-04-25 23:45 UTC
Database layout had been something in the realm of witchery and nightmares.
"VSAM Performance Considerations, William F. Manry, November 1, 1981"
https://www.youtube.com/watch?v=oGCESAvdvuc
#retrocoomputing #vsam #ibm #mainframe
Replies (1)
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@RupertReynolds@hachyderm.io 2026-04-26 01:09
@adorfer Oh boy. (shiver!) I used to be passable at that stuff, and yet by about 5 mins I learned something new about CA size! It was hard work, especially from assembly. As I remember it, DB2 was built on VSAM, because its performance was good, and I guess because it was available :-)