Question 5
An vSAN administrator is relying on vSAN Stretched Clusters to protect against entire-site failures.
How is this protection accomplished?
By configuring data locality
By placing redundant components at both sites
By synchronizing virtual machine data from the witness site
By using asynchronous data transfer
Correct answer: B
Explanation:
Each site in the stretched cluster is configured as a fault domain. Fault domains are used to spread redundancy components across servers. In a traditional vSAN cluster, redundant components are spread across servers in separate computing racks, and as a result, can tolerate rack failures, cache and capacity device failures, network device failures, and power failures. When used in a stretched cluster, fault domains spread redundancy components across sites, and therefore can tolerate the failure of an entire data site. The minimum number of hosts in a stretched cluster is three, one host in each data site plus the witness host in the witness site. Themaximum number of hosts in a stretched cluster is 31, fifteen hosts in each data site plus the witness host in the witness site.
Each site in the stretched cluster is configured as a fault domain. Fault domains are used to spread redundancy components across servers. In a traditional vSAN cluster, redundant components are spread across servers in separate computing racks, and as a result, can tolerate rack failures, cache and capacity device failures, network device failures, and power failures. When used in a stretched cluster, fault domains spread redundancy components across sites, and therefore can tolerate the failure of an entire data site. The minimum number of hosts in a stretched cluster is three, one host in each data site plus the witness host in the witness site. The
maximum number of hosts in a stretched cluster is 31, fifteen hosts in each data site plus the witness host in the witness site.