2V0-17.25 practice question 8 of 15

A large corporation recently experienced a power outage at one of its primary data centers resulting in service disruption for customers in that…

Choose your answer, then check it against the explanation.

Domain Manage Policies

A large corporation recently experienced a power outage at one of its primary data centers resulting in service disruption for customers in that region. An administrator is tasked to assess the current infrastructure and propose a plan to improve resiliency. Current configuration: Single-site vSAN Express Storage Architecture (ESA) cluster 12 hosts Cluster resource utilization (CPU, memory, and storage) is under 30% Which solution would improve resiliency and minimize service disruption in data center outages with a recovery point objective (RPO) of zero without requiring additional hosts?

Answer options

Correct Answer:

Explanation

A vSAN Stretched Cluster is the only solution that meets all the specified requirements. It provides site-level availability by synchronously replicating data across two geographically separate data centers. This configuration achieves a zero Recovery Point Objective (RPO=0) because writes are committed to both sites before being acknowledged. If one data center fails, vSphere HA automatically restarts the virtual machines on the surviving site with no data loss. The existing 12 hosts can be split, with six hosts in each data center, fulfilling the requirement of not needing additional hardware. The low cluster utilization ensures the remaining hosts can handle the workload after a failover.

Why Incorrect

B. VMware Live Recovery orchestrates disaster recovery but typically uses asynchronous replication (RPO > 0) and requires a separate, independent cluster at the recovery site, violating the "no additional hosts" constraint.

C. A RAID-1 storage policy with Failures to tolerate = 2 protects against component failures (e.g., hosts, disks) within a single data center but offers no protection against a complete site outage.

D. Fault domains protect against rack-level failures within a single data center. They do not provide resiliency against an event, like a power outage, that affects the entire site.

References

1. VMware vSAN Documentation

"Administering VMware vSAN 8.0"

Chapter 8: Stretched Clusters.

Page 101

"Stretched Cluster Concepts": "Stretched clusters provide resiliency against the loss of an entire site... vSAN stretched clusters provide a zero recovery point objective (RPO)." This directly supports the RPO=0 and site-level resiliency claims for option A.

Page 102

"Stretched Cluster Host and Witness Host Requirements": This section details how hosts are distributed across sites (e.g.

6 hosts in data site 1

6 hosts in data site 2

and 1 witness host)

confirming that the existing 12 hosts can be repurposed as required by the question.

2. VMware vSAN Documentation

"Administering VMware vSAN 8.0"

Chapter 7: Using Fault Domains in a vSAN Cluster.

Page 98

"Fault Domain Concepts": "You can group hosts into server racks... to protect against rack failure. When you configure fault domains

vSAN spreads redundant components across the fault domains." This confirms that fault domains (Option D) are for intra-site (e.g.

rack) protection

not inter-site (data center) protection.

3. VMware vSAN Documentation

"Administering VMware vSAN 8.0"

Chapter 6: vSAN Storage Policies.

Page 78

"Site disaster tolerance": This section explains that only a stretched cluster policy provides site-level protection. The "Failures to tolerate" setting (Option C) is described as protecting against "host

disk

or network failures" within a single site.

4. VMware Live Recovery Documentation

"VMware Live Recovery Datasheet".

The document describes the architecture as having a "Protected Site" and a "Recovery Site

" implying two separate infrastructures. It also highlights its use of vSphere Replication

which provides asynchronous replication with an RPO as low as 1 minute

but not zero. This invalidates Option B on both the "no additional hosts" and "RPO=0" requirements.

Question 8 of 15

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