A vSAN administrator needs to build a vSAN ESA cluster with RAID-5/FTT 1 adaptive storage policy.
What is the absolute minimum number of hosts that need to be part of that vSAN ESA cluster?
A vSAN administrator needs to build a vSAN ESA cluster with RAID-5/FTT 1 adaptive storage policy.
What is the absolute minimum number of hosts that need to be part of that vSAN ESA cluster?
To build a vSAN ESA (Express Storage Architecture) cluster with RAID-5/FTT 1 adaptive storage policy, the absolute minimum number of hosts required is 3. This is because vSAN ESA can use Adaptive RAID-5 erasure coding, which allows for RAID-5 configurations with as few as three hosts. This architecture writes data as a stripe consisting of 2 data bits and 1 parity bit, ensuring space efficiency and resilience across a minimum of three hosts.
D is the answer. vSAN ESA combines the space efficiency of RAID-5/6 erasure coding with the performance capabilities of RAID-1 mirroring. It introduces Adaptive RAID-5 erasure coding, ensuring guaranteed space savings, even in clusters with as few as three hosts.
Ignore my previous answer. That is for OSA. Answer should be D . Min 3 host. https://core.vmware.com/blog/adaptive-raid-5-erasure-coding-express-storage-architecture-vsan-8 Option #2: FTT=1 using RAID-5 in a 2+1 scheme As shown in Figure 3, this writes the data in a VM as a stripe consisting of 2 data bits and 1 parity bit, across a minimum of 3 hosts. It consumes 1.5x the capacity of the primary data, delivering guaranteed space efficiency of resilient data across just 3 hosts
D https://core.vmware.com/resource/vsan-frequently-asked-questions-faq#section1
RAID-5, 2+1, 3-5 hosts
D. Requirements changed with vSAN 8. Now only need 3 hosts. https://core.vmware.com/blog/adaptive-raid-5-erasure-coding-express-storage-architecture-vsan-8#:~:text=RAID%2D5%20Using%20the%20vSAN%20Original%20Storage%20Architecture&text=Meaning%20that%20the%20data%20is,the%20availability%20of%20the%20data.
Keyword is ESA, which require only 3
D, minimum 3 hosts
https://www.yellow-bricks.com/2022/11/15/vsan-8-0-esa-introducing-adaptive-raid-5/
FOR R1 Mirror FTT=0, 3 nodes min FTT=1, 3 nodes min FTT=2, 5 nodes min FTT=3, 7 nodes min FOR R5/6 EC FTT=0, NA FTT=1, 4 nodes min FTT=2, 6 nodes min FTT=3, NA
Answer should be D. B is for OSA. D is for ESA.
In ESA you need 3 hots
D for vSAN8 ESA
The catch is Adaptive RAID-5/FTT-1 in the questions, so the answer is 3 hosts https://core.vmware.com/blog/adaptive-raid-5-erasure-coding-express-storage-architecture-vsan-8
Answer B :- 4 hosts vSAN OSA RAID-5 (3+1). Absolute minimum = 4 host (Absolute minimum: The least number of hosts to satisfy the policy)
Answer D is correct vSAN ESA RAID-5 (2+1). Recommended minimum = 4 hosts (3 hosts + 1 spare)