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Which DB access method (OSAM or VSAM) is better and why?
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Answer Posted / s
OSAM is better because with even block sizes you can have a
maximum size of 8 GB for a dataset. OSAM supports
sequential buffering, reads 10 consecutive blocks with one
1 I/O operation. This will reduce the elapsed time by 50%.
It also supports queued writes which also results CPU and
elapsed time savings.
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