In an environment with one IBM z14 and one z/OS LPAR, what component would contribute to higher availability?

Question

Options

• ADual HMC setup
• BThree Phase Line cord
• CParallel Sysplex
• DRAIM Memory technology

• A
  3% (1)
• B
  6% (2)
• C
  83% (29)
• D
  9% (3)

Explanation

Parallel Sysplex is the correct choice because it is IBM's premier high-availability clustering architecture for z/OS, allowing multiple systems to work together as a single image - enabling workload balancing, automatic failover, and near-continuous operations. The question implies the need to expand beyond a single LPAR environment; implementing Parallel Sysplex addresses that gap directly.

Why the distractors are wrong:

• A (Dual HMC): A redundant Hardware Management Console protects your management access to the system, but if the z/OS LPAR itself fails, a second HMC does nothing to keep workloads running.
• B (Three Phase Line Cord): This is a power delivery component; while stable power matters, it's a prerequisite, not an availability architecture - it doesn't protect against software faults, planned outages, or workload peaks.
• D (RAIM Memory): RAIM (Redundant Array of Independent Memory) is a real z14 hardware feature that protects against memory failures, but it addresses a narrow hardware fault domain - it cannot recover from OS failures, application crashes, or planned maintenance windows the way Parallel Sysplex can.

Memory tip: Think of Parallel Sysplex as RAID for entire mainframe systems - just as RAID stripes data across multiple disks so one disk failure doesn't cause data loss, Sysplex spans workloads across multiple z/OS images so one system failure doesn't cause an outage. "Sysplex = System Complex = no single point of failure."

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