VCA Study Guide 2026

vSphere Distributed Resource Scheduler (DRS) continuously monitors the resource utilization of ESXi hosts and virtual machines in a cluster. It automatically migrates virtual machines (using vMotion) to balance workloads, optimize performance, and ensure efficient use of CPU and memory resources. This prevents resource contention and maintains application performance.

The HA master host monitors all slave hosts via network and datastore heartbeats, and is responsible for restarting VMs when it detects that a slave host has failed.

vSphere Distributed Resource Scheduler (DRS) continuously monitors the resource utilization of ESXi hosts and virtual machines within a cluster. Its primary goal is to automatically balance workloads by migrating virtual machines (via vMotion) to ensure optimal performance and efficient resource usage across all hosts. This dynamic optimization prevents resource bottlenecks and improves overall cluster efficiency.

HA master hosts send and receive heartbeats from slave hosts every second; if heartbeats are missed beyond the configurable dead time (default ~10-15 seconds), the host is declared failed.

VMware Tanzu integrates Kubernetes container orchestration with vSphere, allowing organizations to run containerized and VM workloads on the same infrastructure with unified management.

A vCPU is a logical processor that the hypervisor presents to a virtual machine, which may be scheduled on one or more physical CPU cores.