Book Image

The Complete VMware vSphere Guide

By : Mike Brown, Hersey Cartwright, Martin Gavanda, Andrea Mauro, Karel Novak, Paolo Valsecchi
Book Image

The Complete VMware vSphere Guide

By: Mike Brown, Hersey Cartwright, Martin Gavanda, Andrea Mauro, Karel Novak, Paolo Valsecchi

Overview of this book

vSphere 6.7 is the latest release of VMware's industry-leading virtual cloud platform. By understanding how to manage, secure, and scale apps with vSphere 6.7, you can easily run even the most demanding of workloads. This Learning Path begins with an overview of the features of the vSphere 6.7 suite. You'll learn how to plan and design a virtual infrastructure. You'll also gain insights into best practices to efficiently configure, manage, and secure apps. Next, you'll pick up on how to enhance your infrastructure with high-performance storage access, such as remote direct memory access (RDMA) and Persistent memory. The book will even guide you in securing your network with security features, such as encrypted vMotion and VM-level encryption. Finally, by learning how to apply Proactive High Availability and Predictive Distributed Resource Scheduler (DRS), you'll be able to achieve enhanced computing, storage, network, and management capabilities for your virtual data center. By the end of this Learning Path, you'll be able to build your own VMware vSphere lab that can run high workloads. This Learning Path includes content from the following Packt products: VMware vSphere 6.7 Data Center Design Cookbook - Third Edition by Mike Brown and Hersey Cartwright Mastering VMware vSphere 6.7 - Second Edition by Martin Gavanda, Andrea Mauro, Karel Novak, and Paolo Valsecchi
Table of Contents (21 chapters)

DRS

As discussed in Chapter 11, Configuring and Managing vSphere 6.7, a vSphere cluster is a collection of ESXi hosts that share resources and a management interface. Some of the vSphere's features are available only on the cluster level and DRS is one of them. Once the DRS is enabled on the cluster, the capability to automatically balance loads across the ESXi hosts will be available. vSphere DRS provides two main functions:

  • Executing the placement of the just-powered-on VM on a specific host in the cluster
  • Periodically (every 5 minutes by default), DRS checks the load on the cluster, providing recommendations for migration or automatically migrate the VM (using vMotion) to get a balanced cluster
If you have a DRS-enabled cluster and one of the hosts is heavily loaded compared to other host members, you might notice DRS doesn't vMotion any running VM off the host...