NCP-DB-6.10 · Question #174
An administrator is attempting to enable high availability (HA) for NDB across three Nutanix clusters located in separate data centers. If the network latency between two clusters exceeds 25ms RTT…
The correct answer is B. HA cannot be enabled due to the latency. NDB supports high availability (HA) across multiple Nutanix clusters, including those in separate data centers, by replicating data and ensuring failover capabilities. However, NDB imposes strict network latency requirements for HA. The official documentation specifies that the…
Question
An administrator is attempting to enable high availability (HA) for NDB across three Nutanix clusters located in separate data centers. If the network latency between two clusters exceeds 25ms RTT, what impact might this have on the NDB HA setup?
Options
- AHA will operate with increased delay.
- BHA cannot be enabled due to the latency.
- CThe clusters will not synchronize.
- DThere will be no impact on HA functionality.
How the community answered
(27 responses)- A4% (1)
- B74% (20)
- C7% (2)
- D15% (4)
Explanation
NDB supports high availability (HA) across multiple Nutanix clusters, including those in separate data centers, by replicating data and ensuring failover capabilities. However, NDB imposes strict network latency requirements for HA. The official documentation specifies that the round-trip time (RTT) latency between clusters should not exceed 25ms for HA to function effectively. If the latency between two clusters exceeds this threshold (e.g., due to geographic distance or network issues), HA cannot be enabled, as the synchronization and failover mechanisms rely on low- latency communication to maintain consistency and performance.
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