NCA-5.15 · Question #43
When a VM generates I/O, which Nutanix component is serving the storage request?
The correct answer is D. CVM. The Controller VM (CVM) is the core Nutanix software component running on every node that handles all storage I/O. When a VM issues a read or write, the hypervisor redirects the request to the local CVM via the local loopback interface. The CVM then processes the request using…
Question
When a VM generates I/O, which Nutanix component is serving the storage request?
Options
- AHypervisor
- BPrism
- CHDD disks
- DCVM
How the community answered
(28 responses)- A4% (1)
- B7% (2)
- D89% (25)
Explanation
The Controller VM (CVM) is the core Nutanix software component running on every node that handles all storage I/O. When a VM issues a read or write, the hypervisor redirects the request to the local CVM via the local loopback interface. The CVM then processes the request using the Nutanix Distributed Storage Fabric (DSF) - handling caching, replication, deduplication, compression, and placement across the cluster's storage devices. The Hypervisor (A) passes the I/O to the CVM but does not serve it. Prism (B) is the management interface. HDD disks (C) are physical media managed by the CVM, not a component that independently serves requests.
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