An administrator has deployed a new vSAN OSA cluster that contains eight hosts and needs to configure a storage policy for the currently deployed database virtual machines. The requirements state that if two hosts in the vSAN OSA cluster fail, all virtual machines are unaffected.
Which RAID configuration must the administrator use in this storage policy to achieve the best performance for the database virtual machines?
To ensure the best performance for database virtual machines and withstand two host failures in a vSAN OSA cluster, RAID-1 with a Failures To Tolerate (FTT) setting of 2 is the optimal choice. RAID-1 (mirroring) provides superior read and write performance compared to RAID-5 and RAID-6. While RAID-6 can also tolerate two host failures, it comes with a significant performance overhead due to parity calculations, making it less suitable for performance-critical applications like databases.
in VSAN OSA, the R1 can have FTT1,2 and 3. In this case, it is R1FTT2.
A is correct Raid 1 best perfomance, vSAN OSA
it's A RAID 1 with FTT=2 RAID 1 for best performance
C - Raid 6 (2 host failure)
I also initially fell for this one, but the question specifically asks about "Best Performance" with OSA. In this case RAID1 is the best performing option and they don't specify any failures to tolerate. With 8 hosts being available, RAID 1 can work in FTT1,2 and 3 and it will be faster than RAID6 with OSA. If the question was ESA then RAID6 would perform comparably to RAID1. Reference: https://docs.vmware.com/en/VMware-Cloud-on-AWS/services/com.vmware.vsphere.vmc-aws-manage-data-center-vms.doc/GUID-EDBB551B-51B0-421B-9C44-6ECB66ED660B.html#:~:text=RAID%2D1%20uses%20more%20disk,comparably%20to%20RAID%2D1%20clusters. Exerpt: RAID-1 uses more disk space but provides better performance. RAID-5/6 (Erasure Coding) uses less disk space, but the performance is reduced in vSAN OSA clusters. vSAN ESA clusters with RAID-5/6 perform comparably to RAID-1 clusters.
Question is tricky, but the catch is best performance, hence Raid 1 is the answer
A is correct, R2 best perfomance ya que es vSAN OSA