An administrator observes an alert in Prism for a hybrid SSD/HDD cluster: "Storage Pool SSD utilization consistently above 75%." What is the potential impact of this condition?

Question

Options

• AThe cluster is unable to sustain an SSD disk failure.
• BThe cluster may be nearly out of storage for metadata.
• CThe cluster is at risk of entering a read-only state.
• DAverage I/O latency in the cluster may increase.

• A
  6% (1)
• B
  6% (1)
• D
  88% (14)

Explanation

In a hybrid SSD/HDD cluster, Nutanix uses SSDs as the hot (performance) tier for frequently accessed data and all metadata. When SSD utilization is consistently above 75%, the cluster's ability to absorb new hot data into the SSD tier is constrained. Data that would normally reside in the fast SSD tier may be forced onto the slower HDD tier, or ILM (Intelligent Lifecycle Management) tiering operations may be delayed. The direct result is increased average I/O latency across the cluster, as more read/write operations are served from the significantly slower spinning disk tier rather than flash storage.

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