NCA-5.15 · Question #75
In a default configuration of an AHV cluster, a single node fails. What happens to the running VMs on that node?
The correct answer is D. The cluster attempts to restart VMs on other hosts. In a default AHV cluster, VM High Availability (HA) is enabled. When a node fails, HA detects the failure and attempts to restart (not live-migrate) the affected VMs on surviving nodes. This is a cold restart - the VMs were running on the failed host and must reboot on a new…
Question
In a default configuration of an AHV cluster, a single node fails. What happens to the running VMs on that node?
Options
- AThe cluster restarts all VMs in the event of a host failure
- BThe VMs do a live migration to the master node in the cluster
- CThe VMs do a live migration to any other node in the cluster
- DThe cluster attempts to restart VMs on other hosts
How the community answered
(37 responses)- A3% (1)
- B5% (2)
- C3% (1)
- D89% (33)
Explanation
In a default AHV cluster, VM High Availability (HA) is enabled. When a node fails, HA detects the failure and attempts to restart (not live-migrate) the affected VMs on surviving nodes. This is a cold restart - the VMs were running on the failed host and must reboot on a new host.
- Option A is partially correct in phrasing but misleading: HA does restart VMs, but only on available other nodes, not indiscriminately 'all VMs in the event of a host failure.'
- Options B and C both describe live migration, which requires the source host to be online. If a node has failed, live migration is impossible - the VMs must be restarted from scratch on a surviving host.
- Option D is correct because it accurately reflects HA behavior: the cluster attempts restarts, subject to available resources on surviving nodes.
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