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Question 113 - 5V0-31.22 discussion

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A systems administrator is tasked with deploying a new VI Workload Domain cluster to support the HR system. A new storage policy must be created to satisfy the following requirements:

* Support two host failures

* Use the least amount of hosts

* Minimize storage capacity usage

Which configuration will satisfy these requirements?

A.
6 Hosts, FTT=2, RAID 1
Answers
A.
6 Hosts, FTT=2, RAID 1
B.
6 Hosts, FTT=2, RAID 5/6
Answers
B.
6 Hosts, FTT=2, RAID 5/6
C.
5 Hosts, FTT=2, RAID 5/6
Answers
C.
5 Hosts, FTT=2, RAID 5/6
D.
5 Hosts, FTT=2, RAID 1
Answers
D.
5 Hosts, FTT=2, RAID 1
Suggested answer: B

Explanation:

This configuration will support two host failures by using RAID-6 (Erasure Coding), which creates two parity segments for each data segment. It will use the least amount of hosts among the options, because RAID-6 requires a minimum of six hosts for FTT=2.It will also minimize storage capacity usage, because RAID-6 uses less disk space than RAID-1 (Mirroring), which creates a full copy of each data segment12

A) 6 Hosts, FTT=2, RAID 1 is not a correct option, because it will not minimize storage capacity usage.RAID-1 will use more disk space than RAID-6, because it will create three copies of each data segment for FTT=212

C) 5 Hosts, FTT=2, RAID 5/6 is not a correct option, because it will not support two host failures. RAID-5 requires a minimum of four hosts for FTT=1, and RAID-6 requires a minimum of six hosts for FTT=2.With five hosts, neither RAID-5 nor RAID-6 can tolerate two host failures12

D) 5 Hosts, FTT=2, RAID 1 is not a correct option, because it will not support two host failures or minimize storage capacity usage. RAID-1 requires a minimum of five hosts for FTT=2, but it also requires an additional host as a witness to maintain quorum. Therefore, with five hosts, RAID-1 can only tolerate one host failure.Moreover, RAID-1 will use more disk space than RAID-6, because it will create three copies of each data segment for FTT=212

asked 16/09/2024
Nick Endrikat
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