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Question 128

An administrator has a 5-node cluster configured for RF2 with 200 TB of raw disk space. The administrator decides to enable Erasure coding to gain additional usable space.

Approximately how much usable space would be available after enabling Erasure coding?

    Correct Answer: C

    To determine the usable space after enabling Erasure Coding (EC) on a 5-node cluster with an RF2 configuration and 200 TB of raw disk space, we need to consider how EC impacts the efficiency. With RF2, each piece of data is replicated twice, using up a significant portion of the raw space. By enabling EC, we distribute data and parity information across the nodes, typically converting to something like a 3:2 data to storage ratio for actual data vs. parity. This results in approximately 150 TB of usable space because 3/4th of the raw disk space will now be utilized for actual data. Therefore, the approximate usable space after enabling Erasure Coding will be 150 TB.

Discussion
egossickOption: C

The answer is C 5 nodes: 1 parity codes 3 parts of data => ¾ of the data written is actual data. 200TiB x¾ (or 200TiB /1.33) = 150TiB https://next.nutanix.com/how-it-works-22/question-regarding-erasor-coding-37713

Orion19Option: C

I believe answer is C

josecongOption: A

Answer A https://portal.nutanix.com/page/documents/solutions/details?targetId=TN-2002-Erasure-Coding:TN-2002-Erasure-Coding

Spawn90

According to your link, it's C, answer is in the table