A customer requires a VxRail Stretched Cluster with E560F nodes in its minimal configuration. In addition, the cluster should be able to use both erasure coding options. Which setup fulfills the requirement?
• Failures to Tolerate – defines how many disk or node failures can be tolerated for
each site. For stretched cluster, it’s ‘2n+1’ (n is the number to tolerate). For erasure
coding, it’s 4 or 6 (1 or 2 failures respectively). All-Flash is required for erasure
coding (RAID5 or 6).
Virtual SAN supports two specific configurations when erasure codes are enabled. The first, RAID-5, applies when
the number of failures to tolerate is set to 1, and the second, RAID-6, applies when the number of failures to
tolerate is set to 2. Note that a Virtual SAN cluster size needs to be at least four hosts for RAID-5 and at least six
hosts for RAID-6. Of course, it may be (much) larger than that.
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