Resiliency Requirement for vSAN Stretched Cluster
Question
A higher level of resiliency has been requested for an existing vSAN Stretched Cluster.
A key requirement will be the addition of a third site to protect against a potential double site failure of the two mirrored sites in the stretched cluster.
What solution would meet the resiliency requirement?
Answers
Explanations
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A. B. C. D.C.
The request for a higher level of resiliency for an existing vSAN Stretched Cluster can be met by adding a third site to protect against a potential double site failure of the two mirrored sites in the stretched cluster. This can be accomplished through several methods.
Option A: Replicate to the third site at the VM level using vSphere Replication. This option involves replicating individual virtual machines to the third site using vSphere Replication. This provides an additional level of protection for critical VMs but does not protect the entire vSAN cluster.
Option B: Configure vSAN Stretched Cluster with FTT=2 to replicate to the third site. This option involves configuring the vSAN Stretched Cluster with a fault tolerance method of 2 (FTT=2) which replicates data across three sites. In this case, each site would have two copies of the data, one local and one remote. This provides protection against a double site failure while still maintaining a stretched cluster.
Option C: Add the third site to the existing vSAN Stretched Cluster. This option involves adding the third site to the existing vSAN Stretched Cluster, making it a three-site stretched cluster. This provides protection against a double site failure while still maintaining the benefits of a stretched cluster, such as local read/write access and improved performance.
Option D: Replicate to the third site at the vSAN datastore level using Site Recovery Manager. This option involves using VMware Site Recovery Manager (SRM) to replicate the entire vSAN datastore to the third site. This provides protection against a double site failure but requires the use of SRM and additional infrastructure to manage the replication.
Of these options, option B is the most suitable for meeting the resiliency requirement as it provides protection against a double site failure while still maintaining a stretched cluster. However, the choice of solution ultimately depends on the specific requirements and constraints of the environment.
