An environment has two VxRail Clusters with the following configuration - Cluster-A is using FTT = 2 and FTM = Erasure Coding - Cluster-B is using FTT = 2 and FTM = Mirroring A 100 GB VM is planned…

The correct answer is B. 167 GB. To calculate the additional vSAN capacity consumed when a 100 GB VM is vMotioned from Cluster-A to Cluster-B, consider the following: Cluster-A: FTT = 2 and FTM = Erasure Coding (RAID 6), which uses approximately 1.5 times the data size, thus 100 GB VM uses about 150 GB of vSAN…

VxRail Concepts and Architecture

Question

An environment has two VxRail Clusters with the following configuration

Cluster-A is using FTT = 2 and FTM = Erasure Coding
Cluster-B is using FTT = 2 and FTM = Mirroring

A 100 GB VM is planned to be vMotioned from Cluster-A to Cluster-B. How much more vSAN capacity is consumed in Cluster-B than in Cluster-A?

Options

A100 GB
B167 GB
C150 GB
D0GB

How the community answered

(41 responses)

A
5% (2)
B
78% (32)
C
15% (6)
D
2% (1)

Explanation

To calculate the additional vSAN capacity consumed when a 100 GB VM is vMotioned from Cluster-A to Cluster-B, consider the following: Cluster-A: FTT = 2 and FTM = Erasure Coding (RAID 6), which uses approximately 1.5 times the data size, thus 100 GB VM uses about 150 GB of vSAN capacity. Cluster-B: FTT = 2 and FTM = Mirroring (RAID 1), which uses 3 times the data size, thus 100 GB VM uses 300 GB of vSAN capacity. The difference in vSAN capacity consumed between Cluster-B and Cluster-A is: 300 GB (Cluster-B) - 150 GB (Cluster-A) = 150 GB So, Cluster-B consumes 150 GB more vSAN capacity than Cluster-A.

Topics

#vSAN capacity planning#FTT erasure coding#RAID 6 mirroring#space consumption comparison

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