Based on VMware vSphere 8.x Advanced documentation, the architect is designing a vSphere-based solution to meet three specific requirements: a recovery point objective (RPO) of 15 minutes, a primary and secondary site, and support for orchestration to address application dependencies. The solution must include two VMware technologies that collectively satisfy these requirements.
Requirements Analysis:
Recovery Point Objective (RPO) of 15 minutes: The solution must ensure that no more than 15 minutes of data is lost in a disaster, requiring frequent data replication or synchronization between sites.
Primary and secondary site: The solution must support a disaster recovery (DR) architecture with two distinct sites, implying replication or failover capabilities between them.
Orchestration to address application dependencies: The solution must provide automated recovery workflows to manage the startup order and dependencies of multi-tier applications (e.g., ensuring a database starts before an application server).
Evaluation of Options:
A. vSAN stretched cluster:
Why incorrect: A vSAN stretched cluster provides high availability and disaster recovery by synchronously replicating data across two sites, achieving near-zero RPO and RTO. However, it is designed for high-availability scenarios within a single vSphere cluster spanning sites, not traditional DR with orchestration. vSAN stretched clusters do not natively provide orchestration for application dependencies (e.g., automated recovery plans or startup order), which is a key requirement. Additionally, stretched clusters require low-latency, high-bandwidth connections (typically <5ms RTT), which is not guaranteed in the provided information. This option does not fully meet the orchestration requirement.
B. vSphere HA:
Why incorrect: vSphere High Availability (HA) provides automatic VM restarts within a cluster in case of host failures, but it operates within a single site and does not support replication or failover between primary and secondary sites. vSphere HA does not address the 15-minute RPO requirement, as it does not replicate data, nor does itprovide orchestration for application dependencies across sites. This option is unsuitable for a multi-site DR scenario.
C. Site Recovery Manager:
Why correct: VMware Site Recovery Manager (SRM) is a disaster recovery solution designed for automated failover and failback between primary and secondary sites. SRM supports orchestration of recovery plans, allowing the architect to define the startup order and dependencies of multi-tier applications (e.g., starting a database before an application server). When paired with vSphere Replication, SRM can achieve an RPO of 15 minutes by orchestrating the failover of replicated VMs. SRM meets the requirements for primary/secondary site support, orchestration for application dependencies, and integration with replication technologies to achieve the required RPO.
[: VMware vSphere 8 documentation highlights SRM for automated DR orchestration, supporting recovery plans and integration with vSphere Replication for site-to-site failover., D. vSphere Fault Tolerance:, Why incorrect: vSphere Fault Tolerance (FT) provides continuous availability by maintaining a live secondary VM on another host within the same site, with zero RPO and RTO for host failures. However, FT is not designed for multi-site disaster recovery, as it operates within a single cluster and does not replicate data between sites. FT also lacks orchestration capabilities for application dependencies and is resource-intensive, unsuitable for large-scale DR scenarios. This option does not meet the multi-site or orchestration requirements., E. vSphere Replication:, Why correct: vSphere Replication is a hypervisor-based replication solution that asynchronously replicates VMs from a primary site to a secondary site, supporting an RPO as low as 15 minutes. It integrates with SRM to provide orchestrated recovery, ensuring application dependencies are addressed through SRM’s recovery plans. vSphere Replication meets the 15-minute RPO requirement and supports the primary/secondary site architecture by enabling data replication. When used with SRM, it provides a complete DR solution., Reference: VMware vSphere 8 documentation confirms vSphere Replication supports RPOs of 15 minutes or less and integrates with SRM for orchestrated recovery., Why C and E are the Best Choices:, Site Recovery Manager (C): SRM provides the orchestration needed to manage application dependencies during failover, defining recovery plans that ensure the correct startup order for multi-tier applications. It automates DR processes between primary and secondary sites, meeting the multi-site requirement., vSphere Replication (E): vSphere Replication ensures data is replicated between sites with an RPO of 15 minutes, meeting the data loss requirement. It works seamlessly with SRM to enable orchestrated failover, completing the DR solution., Combined Solution: SRM and vSphere Replication together provide a comprehensive DR solution that addresses all requirements: 15-minute RPO, primary/secondary site support, and orchestration for application dependencies., Why Not A, B, or D?, vSAN stretched cluster (A): While it supports near-zero RPO, it lacks native orchestration for application dependencies and assumes low-latency site connectivity, which is not specified., vSphere HA (B): Limited to single-site host failure recovery, it does not support multi-site DR, replication, or orchestration., vSphere Fault Tolerance (D): Designed for single-site, host-level availability, not multi-site DR or orchestration., Example Implementation:, vSphere Replication: Configure replication for VMs from the primary site to the secondary site, setting an RPO of 15 minutes., Site Recovery Manager: Deploy SRM at both sites, integrated with vSphere Replication. Create recovery plans specifying the startup order for applications (e.g., database VMs before application VMs) to address dependencies., vCenter: Use a vCenter instance at each site to manage replication and recovery, with SRM orchestrating failover., , ]
