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vSphere High Performance Cookbook - Second Edition

You're reading from   vSphere High Performance Cookbook - Second Edition Recipes to tune your vSphere for maximum performance

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Product type Paperback
Published in Jun 2017
Publisher
ISBN-13 9781786464620
Length 338 pages
Edition 2nd Edition
Tools
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Authors (3):
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Christopher Kusek Christopher Kusek
Author Profile Icon Christopher Kusek
Christopher Kusek
Prasenjit Sarkar Prasenjit Sarkar
Author Profile Icon Prasenjit Sarkar
Prasenjit Sarkar
Kevin Elder Kevin Elder
Author Profile Icon Kevin Elder
Kevin Elder
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Toc

Table of Contents (11) Chapters Close

Preface 1. CPU Performance Design 2. Memory Performance Design FREE CHAPTER 3. Networking Performance Design 4. DRS, SDRS, and Resource Control Design 5. vSphere Cluster Design 6. Storage Performance Design 7. Designing vCenter on Windows for Best Performance 8. Designing VCSA for Best Performance 9. Virtual Machine and Virtual Environment Performance Design 10. Performance Tools

Improving performance through VMDirectPath I/O

VMware vSphere DirectPath I/O leverages Intel VT-d and AMD-Vi hardware support to allow guest operating systems to directly access hardware devices. In the case of networking, vSphere DirectPath I/O allows the VM to access a physical NIC directly rather than using an emulated device or a paravirtualized device. An example of an emulated device is the E1000 virtual NIC, and examples of paravirtualized devices are the VMXNET and VMXNET 3 virtual network adapters. vSphere DirectPath I/O provides limited increases in throughput, but it reduces the CPU cost of networking-intensive workloads.

vSphere DirectPath I/O is not compatible with certain core virtualization features. However, when you run ESXi on certain vendor configurations, vSphere DirectPath I/O for networking is compatible with the following:

  • VMware vMotion
  • Hot adding and...
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