VSAM ⭐ Featured
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Q: Explain MASSINSERT?

Answer:
MASSINSERT optimizes bulk sequential inserts. System defers CI splits. Better performance for loads. Implicit with REPRO. COBOL can hint with APPLY WRITE-ONLY style.
massinsert bulk load
CICS ⭐ Featured
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Q: What is WRITE command?

Answer:
WRITE adds new record. EXEC CICS WRITE FILE(name) FROM(data) RIDFLD(key) LENGTH(len). DUPREC condition if key exists. KEYLENGTH for generic. MASSINSERT optimizes bulk loads.
write file record