An organization wants to configure a new storage policy based on the following requirements: Failures to tolerate = FTT 1/RAID-5 (Erasure Coding) Number of disk stripes per object = 8 IOPS limit for…

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Options

• A2
• B1
• C8
• D32

• A
  81% (13)
• B
  6% (1)
• C
  13% (2)

Explanation

Figure 2. Object using RAID-5, with a stripe width of 8, where there are 2 components per host. With vSAN 7 U1, a stripe width setting for erasure codes must be done in multiples of 4 or 6 respectively for the effective stripe width to be increased. This new method of calculation is much more practical, as a RAID-1 mirror was far more likely to need a higher stripe width value than RAID-5/6. Objects using RAID-5/6 erasure codes would most likely not benefit from stripe widths beyond 2 or 3, if at all. The table below shows the stripe width settings for vSAN 7 U1 as it relates to the data placement scheme used. https://blogs.vmware.com/virtualblocks/2021/01/21/stripe-width-improvements-in-vsan-7-u1/

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