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2V0-621 · Question #209

Refer to the Exhibit. A Storage Policy for a Virtual SAN is set to the default policy, as shown in the Exhibit. Which change would reduce the storage consumption by one third?

The correct answer is A. Number of failures to tolerate = 1. vSAN storage policies define fault tolerance levels that directly determine storage overhead per object. Reducing FTT from 2 to 1 drops required data copies from 3 to 2, cutting storage use by exactly one third.

Section 3 – Configure and Administer vSphere 6.x Storage

Question

Refer to the Exhibit. A Storage Policy for a Virtual SAN is set to the default policy, as shown in the Exhibit. Which change would reduce the storage consumption by one third?

Exhibit

2V0-621 question #209 exhibit

Options

  • ANumber of failures to tolerate = 1
  • BNumber of disk stripes per object = 2
  • CNumber of failures to tolerate = 3
  • DNumber of disk stripes per object = 1

How the community answered

(31 responses)
  • A
    55% (17)
  • B
    6% (2)
  • C
    26% (8)
  • D
    13% (4)

Why each option

vSAN storage policies define fault tolerance levels that directly determine storage overhead per object. Reducing FTT from 2 to 1 drops required data copies from 3 to 2, cutting storage use by exactly one third.

ANumber of failures to tolerate = 1Correct

With FTT set to 2 (the default shown in the exhibit), vSAN maintains 3 full copies of each object, consuming 3x the raw capacity. Reducing FTT to 1 requires only 2 copies, lowering consumption to 2x - a reduction of exactly one third of the total storage used by that policy.

BNumber of disk stripes per object = 2

Number of disk stripes per object controls how data is distributed across capacity devices for performance purposes and has no effect on the total number of copies stored or overall storage consumption.

CNumber of failures to tolerate = 3

Setting FTT to 3 requires 4 full data copies, which would increase storage consumption significantly rather than reduce it.

DNumber of disk stripes per object = 1

Setting disk stripes per object to 1 changes I/O stripe width behavior but does not alter the number of object copies maintained by vSAN and therefore does not reduce storage consumption.

Concept tested: vSAN storage policy FTT and capacity overhead

Source: https://docs.vmware.com/en/VMware-vSAN/8.0/vsan-storage-management/GUID-5255E7A8-F420-4757-8C5E-4B2B8B3E4DB8.html

Topics

#vSAN#storage policy#failures to tolerate#storage consumption

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