As part of the requirement gathering phase, an architect identified the following requirement for the newly deployed SDDC environment: Reduce the network latency between two application virtual…

Question

Options

• AConfigure a Storage DRS rule to keep the application virtual machines on the same datastore.
• BConfigure a DRS rule to keep the application virtual machines on the same ESXi host.
• CConfigure a DRS rule to separate the application virtual machines to different ESXi hosts.
• DConfigure a Storage DRS rule to keep the application virtual machines on different datastores.

• A
  3% (1)
• B
  74% (25)
• C
  18% (6)
• D
  6% (2)

Explanation

The requirement is to reduce network latency between two application virtual machines (VMs) in a VMware Cloud Foundation (VCF) 5.2 SDDC environment. Network latency is influenced by the physical distance and network hops between VMs. In a vSphere environment (core to VCF), VMs on the same ESXi host communicate via the host's virtual switch (vSwitch or vDS), avoiding physical network traversal, which minimizes latency. Let's evaluate each option: Option A: Configure a Storage DRS rule to keep the application virtual machines on the same Storage DRS manages datastore usage and VM placement based on storage I/O and capacity, not network latency. The vSphere Resource Management Guide notes that Storage DRS rules (e.g., VM affinity) affect storage location, not host placement. Two VMs on the same datastore could still reside on different hosts, requiring network communication over physical links (e.g., 10GbE), which doesn't inherently reduce latency. Option B: Configure a DRS rule to keep the application virtual machines on the same ESXi host DRS (Distributed Resource Scheduler) controls VM placement across hosts for load balancing and can enforce affinity rules. A "keep together" affinity rule ensures the two VMs run on the same ESXi host, where communication occurs via the host's internal vSwitch, bypassing physical network latency (typically <1祍 vs. milliseconds over a LAN). The VCF 5.2 Architectural Guide and vSphere Resource Management Guide recommend this for latency-sensitive applications, directly meeting the requirement. Option C: Configure a DRS rule to separate the application virtual machines to different ESXi A DRS anti-affinity rule forces VMs onto different hosts, increasing network latency as traffic must traverse the physical network (e.g., switches, routers). This contradicts the goal of reducing latency, making it unsuitable. Option D: Configure a Storage DRS rule to keep the application virtual machines on different A Storage DRS anti-affinity rule separates VMs across datastores, but this affects storage placement, not host location. VMs on different datastores could still be on different hosts, increasing network latency over physical links. This doesn't address the requirement, per the vSphere Resource Management Guide.

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