Book Image

Implementing VxRail HCI Solutions

Book Image

Implementing VxRail HCI Solutions

Overview of this book

Hyper-converged infrastructure (HCI) can help you simplify the provisioning and daily operations of computing and storage. With this book, you'll understand how HCI can offload the day 0 deployment and day-to-day operations of a system administrator. You'll explore the VxRail Appliance, which is an HCI solution that provides lifecycle management, automation, and operational simplicity. Starting with an overview of the VxRail Appliance system architecture and components, you'll understand the benefits of the VxRail system and compare it with the environment of traditional servers and storage. As you advance, the book covers topics such as disaster recovery and active-active and active-passive solutions for VxRail. By the end of this book, you'll have gained the confidence to manage the deployment, administration, planning, and design of a VxRail system.
Table of Contents (16 chapters)
1
Section 1: Getting Started with VxRail HCI System
4
Section 2: Administration of VxRail
10
Section 3: Advanced Solutions for VxRail

vSAN availability

In this section, we will discuss high availability in a VxRail vSAN cluster. This includes the vSAN fault domains and maintenance mode. Now we will discuss these aspects.

Overview of vSAN fault domains

vSAN fault domains are used to ensure protection against rack or room failure, and we can create fault domains for vSAN high availability. A fault domain consists of a vSAN host or more vSAN hosts in a physical location, for example, racks or data centers. When we define fault domains, it depends on the vSAN tolerate failures of entire physical racks, a single host, disk devices, the network switch, and so on.

Now we will discuss an example. Figure 5.28 shows an example of fault domains in a VxRail vSAN cluster:

Figure 5.28 – vSAN fault domain example

The minimum requirement for fault domains is three domains. In best practice, four or more fault domains is the recommended configuration. In Figure 5.28, there are eight nodes...