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Essential Virtual SAN (VSAN): Administrator’s Guide to VMware® Virtual SAN by Duncan Epping, Cormac Hogan

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Chapter 6. Architectural Details

Architecture

Introduction

This chapter will examine some of the underlying architectural details of Virtual SAN. We have already touched on a number of these aspects of VSAN, including the use of flash for caching I/O, the role of VASA in surfacing up VSAN capabilities, VM Storage Policies, witness disks, the need for pass-through RAID controllers and so on.

In this chapter we will talk in detail about these features. Before we will dive in to some of the lower level details there is one concept that we like to discuss first, Distributed RAID / RAIN as it is the core of VSAN.

Distributed RAID

VSAN is able to provide highly available and excellent performing virtual machines through the use of distributed RAID. ...

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