Book Image

vSphere High Performance Cookbook - Second Edition - Second Edition

By : Kevin Elder, Christopher Kusek, Prasenjit Sarkar
Book Image

vSphere High Performance Cookbook - Second Edition - Second Edition

By: Kevin Elder, Christopher Kusek, Prasenjit Sarkar

Overview of this book

vSphere is a mission-critical piece of software for many businesses. It is a complex tool, and incorrect design and deployment can create performance related issues that can negatively affect the business. This book is focused on solving these problems as well as providing best practices and performance-enhancing techniques. This edition is fully updated to include all the new features in version 6.5 as well as the latest tools and techniques to keep vSphere performing at its best. This book starts with interesting recipes, such as the interaction of vSphere 6.5 components with physical layers such as CPU, memory, and networking. Then we focus on DRS, resource control design, and vSphere cluster design. Next, you’ll learn about storage performance design and how it works with VMware vSphere 6.5. Moving on, you will learn about the two types of vCenter installation and the benefits of each. Lastly, the book covers performance tools that help you get the most out of your vSphere installation. By the end of this book, you will be able to identify, diagnose, and troubleshoot operational faults and critical performance issues in vSphere 6.5.
Table of Contents (17 chapters)
Title Page
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Improving network performance using the SplitRx mode for multicast traffic


Multicast is an efficient way of disseminating information and communicating over the network. Instead of sending a separate packet to every receiver, the sender sends one packet that is then distributed to every receiver that has subscribed to this multicast. Multiple receivers can be enabled on a single ESXi host only when you use multicast traffic. Because multiple receivers reside on the same host, packet replication is carried out in the hypervisor instead.

SplitRx mode uses multiple physical CPUs in an ESXi host to process network packets received in a single network queue. As it does not transfer the same copy of the network packet, it provides a scalable and efficient platform for multicast receivers. SplitRx mode improves the throughput and CPU efficiency for multicast traffic workloads.

Only the VMXNET 3 network adapter supports SplitRx mode. This feature is disabled on vSphere 5.0 by default; however, it...