A client is concerned about their x86 database I/O response time. Further analysis reveals significant I/O wait delay. How is the IBM Z architecture better equipped than the x86 architecture to…

Question

Options

• AIt leverages the VRIO (Vector I/O) to control I/O wait.
• BIt leverages the I/O subsystem to manager I/O wait.
• CIt leverages the VIO (Virtual I/O) to eliminate I/O wait.
• DIt leverages zIIP processors to speed-up I/O wait.

• A
  13% (3)
• B
  4% (1)
• C
  78% (18)
• D
  4% (1)

Explanation

Option C is correct because IBM Z's VIO (Virtual I/O) allows temporary datasets to reside in virtual storage (memory-managed paging space) rather than on physical DASD, effectively eliminating physical I/O wait by keeping data in-memory rather than requiring disk read/write cycles. Option A is wrong because "VRIO" is not a real IBM Z technology - it's a fabricated term designed to distract. Option B is partially plausible since IBM Z does have a powerful channel-based I/O subsystem, but the question asks specifically about eliminating I/O wait, which is VIO's role - the I/O subsystem manages I/O traffic but doesn't eliminate the wait. Option D is wrong because zIIP processors are specialty engines that offload eligible workloads (Java, XML, database utilities) to reduce general CPU cost, not to address I/O latency. Memory tip: Think of VIO as "Virtually No I/O" - by keeping data in virtual storage, physical disk operations are bypassed entirely, so the wait simply disappears.

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