NCP Nutanix Architecture and Concepts 4

Question 1

What is Nutanix Erasure Coding (EC-X) and when is it most beneficial?

Accepted Answer

A RAID-like technique that reduces storage overhead for cold data by encoding it across nodes instead of full replicas

Answer

EC-X uses a RAID-like stripe across nodes to provide data redundancy with less storage overhead than full RF2/RF3 replication, ideal for cold or infrequently accessed data.

Question 2

In Prism Central, what does the 'X-Play' feature provide?

Accepted Answer

Automated playbooks that trigger actions based on events or alerts

Answer

X-Play is Nutanix's automation engine in Prism Central that lets administrators create playbooks to automatically respond to alerts and events with predefined actions.

Question 3

How does Nutanix achieve storage locality for VM I/O?

Accepted Answer

By preferentially storing a VM's data on the same node where the VM is running to minimize network traffic

Answer

Nutanix's data locality principle ensures that data written by a VM is preferentially stored on the same node's disks, reducing cross-network I/O for read operations.

Question 4

What happens to data locality when a VM is vMotioned (live migrated) to another node in Nutanix?

Accepted Answer

Data remains on the original node; Nutanix migrates it opportunistically in the background based on access patterns

Answer

After a live migration, the VM reads data remotely from the original node, and Nutanix opportunistically migrates the data to the new node in the background to restore locality.

Question 5

Which Nutanix storage feature allows multiple VMs to share a single vDisk efficiently by storing only unique blocks?

Accepted Answer

Linked Clones via thin-provisioned snapshots

Answer

Nutanix uses a redirect-on-write snapshot mechanism to create space-efficient linked clones where VMs share a base vDisk and only unique changed blocks are stored per VM.

(NCP) Certified Nutanix Professional Practice Test

(NCP) Certified Nutanix Professional Practice Test

NCP Nutanix Architecture and Concepts 4