Refer to the exhibit. A storage administrator is designing a vSAN stretched cluster with production workload running on a preferred site. A VM has been deployed on the preferred site. How does the VM read I/O?
A.
50 percent from preferred site and 50 percent from non-preferred site
B.
70 percent from preferred site and 30 percent from non-preferred site
I agree with the answer C: the READs IOPS are executed 100% locally with no penalty.
https://storagehub.vmware.com/t/vsan-frequently-asked-questions-faq/architecture/
C is right.
Read locality reduces the latency incurred on read operations.
In a standard vSAN cluster, reads are load- balanced across all of an object’s RAID1 mirrors.
In stretched clusters, vSAN uses a read locality algorithm to read 100 percent from the data copy on the local site.
The local site is the same site where the compute resource resides.
Taken from vSAN 6.7 Deploy and Manage Lecture Manual - About Read Locality section
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LCOJ
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