000-221 Question #229: Real Exam Question with Answer & Explanation

The correct answer is C. A supported disk in a highly available storage configuration that is accessible by all nodes that form the cluster. Cluster Aware AIX requires a shared repository disk accessible by all nodes to store and manage cluster configuration data.

Question

Which resource is required to make the cluster configuration data available when using Cluster Aware AIX?

Options

AA cluster controller node that keeps the cluster configuration data synchronized between nodes.
BAn NFS file system that is accessible with read/write permissions by all nodes that form the cluster.
CA supported disk in a highly available storage configuration that is accessible by all nodes that form the cluster
DA "quorum busting" disk to prevent loss of quorum from impacting availability of the cluster configuration data.

Explanation

Cluster Aware AIX requires a shared repository disk accessible by all nodes to store and manage cluster configuration data.

Common mistakes.

A. CAA is a peer-based clustering technology with no dedicated cluster controller node; all nodes participate equally and configuration is stored on the shared repository disk, not managed by a controller.
B. CAA does not rely on NFS for cluster configuration storage; using NFS would introduce a network-based single point of failure that undermines the high availability goals of the cluster.
D. There is no 'quorum busting' disk concept in CAA; the repository disk provides quorum functionality rather than bypassing it, and bypassing quorum would reduce rather than improve availability.

Concept tested. Cluster Aware AIX repository disk requirement

Reference. https://www.ibm.com/docs/en/aix/7.3?topic=administering-cluster-aware-aix

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