NCP-DB-6.10 · Question #151
During maintenance, a team wants to power off the repository VM. The VM is not the primary or synchronized copy node. What is the expected outcome?
The correct answer is B. There will be no service interruption. In an NDB environment, the repository VM stores metadata and configuration data but is not a critical runtime component for service availability. If the team powers off the repository VM during maintenance, and it is neither the primary nor a synchronized copy node, the NDB…
Question
During maintenance, a team wants to power off the repository VM. The VM is not the primary or synchronized copy node. What is the expected outcome?
Options
- AThe HAProxy VMs will failover instead.
- BThere will be no service interruption.
- CManual interaction will be required to restore service.
- DNDB services will fail over immediately.
How the community answered
(64 responses)- A13% (8)
- B80% (51)
- C3% (2)
- D5% (3)
Explanation
In an NDB environment, the repository VM stores metadata and configuration data but is not a critical runtime component for service availability. If the team powers off the repository VM during maintenance, and it is neither the primary nor a synchronized copy node, the NDB service will continue to operate without interruption. NDB's high availability (HA) architecture, managed by HAProxy and other components, ensures redundancy and failover capabilities, allowing the system to rely on the primary and synchronized nodes. The repository VM's downtime only affects metadata access, which can be restored post-maintenance without impacting ongoing database operations.
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