Book Image

Learning VMware vSphere

By : Rebecca Fitzhugh, Abhilash G B
Book Image

Learning VMware vSphere

By: Rebecca Fitzhugh, Abhilash G B

Overview of this book

Computer virtualization is a method to enable the running of multiple application workloads on a machine to achieve efficient utilization and reduce the number of physical machines in a data center. This has now become the foundation of many modern day data centers. What began as a technology to virtualize x86 architecture has now grown beyond the limits of a server’s hardware and into the realm of storage and network virtualization. VMware is currently the market leader in developing data center virtualization solutions. This book goes into the details of designing and implementing VMware solutions that form the foundation of a VMware infrastructure. The book begins by introducing you to the concepts of server virtualization followed by the architecture of VMware’s hypervisor – ESXi and then by its installation and configuration. You then learn what is required to manage a vSphere environment and configure advanced management capabilities of vCenter. Next you are taken through topics on vSphere Networking, Storage, ESXi Clustering, Resource Management and Virtual Machine Management. You will then be introduced to SSL Certificate Management and its use in a vSphere environment. Finally, you will learn about the lifecycle management of a vSphere environment by effectively monitoring, patching and upgrading vSphere components using Update Manager. By the end of the book, you will know how to use VMware’s vSphere suite of components to lay the foundation of a modern day virtual infrastructure.
Table of Contents (18 chapters)
Learning VMware vSphere
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface

Storage Array types


We have learnt from the previous section that there are different types of arrays not just based on the protocol they support but also the type of load balancing and failover they support.

  • There are three types of arrays based on their load balancing or failover abilities:

    • Active/active array

    • Active/passive array

    • ALUA (Asymmetric Logical Unit Access) array

  • The Active/Active or Symmetric Active/Active array will have all the ports on its storage controllers to allow simultaneous processing of the I/O offering the same levels of performance and access to all LUNs:

In a symmetric active/active array, there is no concept of a standby controller.

Tip

Design Tip: When designing a storage architecture with a symmetric active/active array, you can choose different preferred paths on different sets of ESXi hosts in a cluster/data center. For instance, if you have a 10 hosts cluster, then you could set five hosts to use a preferred path via controller-1 and a second set of five hosts...