2V0-622 · 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. If the exhibit shows a default policy with FTT=2 (requiring three data copies, consuming 3x raw storage), reducing FTT to 1 (two copies, 2x raw storage) eliminates one-third of the storage overhead.
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
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
(45 responses)- A58% (26)
- B22% (10)
- C13% (6)
- D7% (3)
Why each option
If the exhibit shows a default policy with FTT=2 (requiring three data copies, consuming 3x raw storage), reducing FTT to 1 (two copies, 2x raw storage) eliminates one-third of the storage overhead.
FTT=2 causes vSAN to maintain three full replicas of every object, consuming three times the raw capacity; reducing FTT to 1 requires only two replicas, reducing total consumption from 3 units to 2 units - a one-third reduction exactly as requested.
Increasing disk stripes per object to 2 affects read performance and I/O distribution across disks but does not reduce the number of data copies, leaving overall storage consumption unchanged.
Setting FTT=3 would require four full replicas of every object, which dramatically increases storage consumption rather than reducing it by one-third.
Setting disk stripes per object to 1 affects striping behavior and may already match the current default; it does not alter the replica count or produce a one-third reduction in storage usage.
Concept tested: vSAN FTT policy impact on storage capacity consumption
Source: https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vsan.doc/GUID-C228168F-6807-4C2A-9D74-E584CAF49A2A.html
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