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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 FREE CHAPTER 2. Memory Performance Design 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

Using VAAI or VASA to boost storage performance


Various storage functions, such as cloning and snapshots, are performed more efficiently by the storage array (target) than by a host (initiator). In a virtualized environment, since virtual disks are files on VMFS and disk, arrays cannot interpret the VMFS on-disk data layout; you cannot leverage hardware functions on a per-VM or per virtual disk (file) basis.

vStorage APIs for Array Integration (VAAI) are a set of new protocol interfaces between ESXi and storage arrays and new application programming interfaces in VMkernel. Using a small set of primitives (fundamental operations) that can be issued to the array using these interfaces, ESXi is able to improve its offering of storage services.

The fundamental operations are:

  • Atomic test & set (ATS)--new locking mechanism
  • Clone blocks/full copy/XCOPY
  • Zero blocks/write same

The goal of VAAI is to help storage vendors provide hardware assistance to speed up VMware I/O operations that are more efficiently...

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