Cool and very useful mainframes tips and tricks!!!
Check out some useful VSAM tips
1. To access VSAM file in CICS as well as batch environment define as SHAREOPTION (2,3)
2. DEFINE PATH command creates alias for VSAM cluster.
3. Choosing control interval size(CI) correctly improves the performance. For sequential access use a large CI size. For Direct access use small CI size.
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