NCP-DB-6.10 · Question #157
An administrator has deployed an NDB HA setup. An electrical maintenance window needs to be planned and the clusters where NDB is deployed must be powered off. After shutting down the load balancer…
The correct answer is B. Shutdown the API standby node. In an NDB HA (High Availability) setup, when planning an electrical maintenance window requiring the clusters hosting NDB to be powered off, the administrator must follow a controlled shutdown sequence to preserve data integrity and minimize disruption. After shutting down the…
Question
An administrator has deployed an NDB HA setup. An electrical maintenance window needs to be planned and the clusters where NDB is deployed must be powered off. After shutting down the load balancer server, what should the administrator do next?
Options
- AIn the sudo systemctl stop patroni command.
- BShutdown the API standby node.
- CRun the high-availability list command.
- DShutdown the API leader node.
How the community answered
(29 responses)- B86% (25)
- C3% (1)
- D10% (3)
Explanation
In an NDB HA (High Availability) setup, when planning an electrical maintenance window requiring the clusters hosting NDB to be powered off, the administrator must follow a controlled shutdown sequence to preserve data integrity and minimize disruption. After shutting down the load balancer server (HAProxy), the next step is to shut down the API standby node. In an NDB HA configuration, the API leader node handles active operations, while the standby node provides redundancy. Shutting down the standby node first ensures the leader remains operational, allowing ongoing management tasks to continue until the final shutdown of the leader
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