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

Understanding RAID groups


Redundant Array Of Independent Disks (RAID) is a mechanism to group hard disks to form the foundation for logical units of storage. Logical disk partitions (drives) or LUNs with file systems or RAW LUNs can be hosted on RAID groups. Every RAID group has two main characteristics: performance and fault tolerance. Having said that, it is important to understand that there are different types of RAID groups based on two principles that dictate how the data destined to the disk group will be written, and they are striping and mirroring:

  • Striping refers to the act of distributing the blocks of data to be written onto all the disks in the RAID group

  • Mirroring refers to the act of writing identical copies of data to more than one disk

Striping and mirroring form the basis of all the other type of RAID groups that can be created. Although, understanding every possible RAID level is beyond the scope of this book, we will review a few that are commonly used in a modern day...