NCP Monitoring, Maintenance, and Troubleshooting 5 — Questions and Answers
Question 1: A Nutanix cluster running RF2 loses two nodes simultaneously. What is the expected impact?
- The cluster continues operating normally with reduced redundancy
- The cluster enters read-only mode
- All VMs are shut down and data becomes inaccessible (Correct answer)
- Storage I/O is suspended until one node recovers
Correct answer: All VMs are shut down and data becomes inaccessible
With RF2, the cluster can tolerate only one node failure; losing two nodes simultaneously results in loss of quorum and data unavailability.
Question 2: Which Prism Central feature allows administrators to set automated actions when a specific alert is triggered, such as running a script?
- Alert Policies
- Playbooks (Correct answer)
- Webhooks
- Workflows
Correct answer: Playbooks
Prism Central Playbooks allow administrators to define trigger-action automations, including running scripts or REST API calls in response to alerts.
Question 3: An administrator needs to verify that Nutanix software-defined storage is not contributing to application latency. Which metric should be monitored in Prism?
- Controller Average I/O Latency (Correct answer)
- Hypervisor Average CPU Ready
- Network Transmit Throughput
- Storage Pool Free Capacity
Correct answer: Controller Average I/O Latency
Controller Average I/O Latency measures the latency at the Nutanix storage controller layer, isolating storage as a latency contributor.
Question 4: When troubleshooting a failed NCC check for 'cluster_services_status_check', which CVM command provides the quickest status overview of all Nutanix services?
- cluster status
- allssh genesis status (Correct answer)
- ncli cluster health
- ncc health_checks run_all
Correct answer: allssh genesis status
Running 'allssh genesis status' executes genesis status across all CVMs simultaneously, giving a quick cluster-wide service health overview.
Question 5: A Nutanix administrator wants to schedule a one-time full NCC health check to run during off-peak hours. How is this accomplished?
- Create a scheduled task in Prism Element under the Alerts tab
- Use the ncli 'health check schedule' command on the CVM
- Configure a Prism Central Playbook to trigger NCC at a specific time (Correct answer)
- NCC can only be run manually and does not support scheduling
Correct answer: Configure a Prism Central Playbook to trigger NCC at a specific time
Prism Central Playbooks support time-based triggers, allowing NCC health checks to be scheduled for specific times.
Question 6: Which Nutanix feature provides automatic healing of data after a drive failure by rebuilding lost data replicas using remaining cluster resources?
- Erasure Coding Rebuild
- Curator-driven Data Reprotection (Correct answer)
- Stargate Auto-Repair
- Zookeeper Data Sync
Correct answer: Curator-driven Data Reprotection
Curator, the Nutanix distributed storage management service, detects under-replicated data after a drive failure and automatically orchestrates data reprotection across the cluster.
Question 7: An NCC check reports 'hypervisor_version_check: FAIL' on two nodes in a mixed-version AHV cluster. What is the most likely cause?
- The AHV ISO was corrupted during upgrade
- A partial or incomplete rolling upgrade left nodes on different AHV versions (Correct answer)
- Prism Central is running a newer version than AHV
- NCC is using an outdated check definition
Correct answer: A partial or incomplete rolling upgrade left nodes on different AHV versions
A failed hypervisor_version_check typically indicates that a rolling upgrade did not complete, leaving some nodes on a different AHV version than the rest.
NCP Monitoring, Maintenance, and Troubleshooting 5
A Nutanix cluster running RF2 loses two nodes simultaneously.
What is the expected impact?