A customer with a z14 has FICON16S+ defined as native FICON wants to optimize the execution of requests to their Storage DS88XX device. Which technology should be implemented for optimizing the…

Question

Options

• ACPACF
• BzHPF
• CSCSI
• DFCTC

• A
  4% (1)
• B
  83% (20)
• C
  4% (1)
• D
  8% (2)

Explanation

zHPF (z High Performance FICON) is correct because it is specifically designed to optimize FICON channel I/O by merging multiple channel programs into a single, more efficient operation - directly reducing overhead and latency on FICON channels (like FICON16S+) communicating with DS88XX storage devices.

Why the others are wrong:

• A. CPACF (Central Processor Assist for Cryptographic Functions) accelerates on-chip encryption/decryption - it has nothing to do with channel or storage I/O optimization.
• C. SCSI is an entirely different storage protocol; the question explicitly states native FICON, making SCSI irrelevant.
• D. FCTC (FICON Tape Channel) is associated with tape storage environments, not disk storage optimization for a DS88XX device.

Memory tip: The clue is in the name - zHPF = z High Performance FICON. Whenever an exam question asks about optimizing a FICON channel, map "High Performance" directly to zHPF. If the question were about encryption, think CPACF; if it mentions tape, consider FCTC.

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