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Question 71 - NCP-MCI-6.5 discussion

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An administrator has been asked to enable block awareness and increase the fault tolerance to FT2 on a Nutanix AHV cluster with the following configuration:

Four blocks

One node per block

Will the administrator be able to accomplish these tasks?

A.
No-Fault tolerance changes are not supported.
Answers
A.
No-Fault tolerance changes are not supported.
B.
Yes-FT2 requires a minimum of three nodes.
Answers
B.
Yes-FT2 requires a minimum of three nodes.
C.
Yes-Block awareness requires a minimum of three blocks.
Answers
C.
Yes-Block awareness requires a minimum of three blocks.
D.
No-FT2 requires a minimum of five nodes.
Answers
D.
No-FT2 requires a minimum of five nodes.
Suggested answer: D

Explanation:

Fault tolerance (FT) is the ability of a cluster to withstand node failures and maintain data availability. FT is determined by the replication factor (RF) of the data, which is the number of copies of each data block stored on different nodes. FT = RF - 1, meaning that the cluster can tolerate as many node failures as one less than the RF. Block awareness is a feature that enhances fault tolerance by ensuring that data copies are distributed across different blocks, which are groups of nodes that share a power source and network switch. Block awareness requires a minimum of three blocks and a minimum of six nodes in the cluster.

In this scenario, the administrator has been asked to enable block awareness and increase the fault tolerance to FT2 on a Nutanix AHV cluster with the following configuration: Four blocks, One node per block. The administrator will not be able to accomplish these tasks because:

To enable block awareness, the cluster needs at least six nodes, but it only has four nodes.

To increase the fault tolerance to FT2, the cluster needs at least five nodes per RF3 or seven nodes per RF4, but it only has four nodes.

Therefore, the administrator will need to add more nodes to the cluster before enabling block awareness and increasing the fault tolerance to FT2.

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asked 23/09/2024
Bob Xiong
38 questions
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