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Getting Started with VMware Virtual SAN
Cedric Rajendran
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eBook - ePub
Getting Started with VMware Virtual SAN
Cedric Rajendran
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Information
Topic
InformatikSubtopic
VirtualisierungGetting Started with VMware Virtual SAN
Table of Contents
Getting Started with VMware Virtual SAN
Credits
About the Author
About the Reviewers
www.PacktPub.com
Support files, eBooks, discount offers, and more
Why subscribe?
Free access for Packt account holders
Instant updates on new Packt books
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Downloading the example code
Errata
Piracy
Questions
1. An Introduction to Software-defined Storage and VSAN
What is a Software-defined Data Center?
The significance of Software-defined Storage
The storage choices and form factors of Software-defined Storage
Traditional storage
Software-based storage
Hyper-converged solutions
An introduction to VMware Virtual SAN
Summary
2. Understanding Virtual SAN
Why should I use VSAN?
What is VSAN?
Building blocks of VSAN
Disk groups
VMFS-L
Storage Policy-based Management
Where do I start? Back to the drawing board
Software requirements
Disk boot device
Local storage and boot from SAN
USB and SD card as boot devices
Disk controller
Disk flash devices
Magnetic disks
Network requirements
Some simpler options
Virtual SAN ready nodes
EVO: RAIL
Summary
3. Workload Profiling and Sizing
Capacity planning guidelines
Profiling workloads
Virtual SAN sizing utility
Virtual SAN shapes and sizes
Custom built
VSAN ready nodes
EVO: RAIL
VMware guidelines for sizing and assumptions
Summary
4. Getting Started with VSAN – Installation and Configuration
Key concepts
Disk groups
Virtual SAN network
Prerequisite checklist
Installation workflow
Hardware specifications
Server node
Cluster layout
Network layout
Setting up a VSAN cluster
VSAN ready nodes – installation
Summary
5. Truly Software-defined, Policy-based Management
Why do we need policies?
Understanding SPBM
VSAN datastore capabilities
Accessing the VSAN datastore capabilities
Number of disk stripes per object
Number of failures to tolerate
Scenario based examples
Scenario 1
Scenario 2
Scenario 3
Flash read cache reservation
Force provisioning
Object space reservation
Under the hood – SBPM
vSphere APIs for Storage Awareness
Managing Virtual SAN storage providers
Summary
6. Architecture Overview
Why such an architecture?
Anatomy of I/O
Write buffer
Destaging data to a magnetic disk
The read cache
The READ I/O workflow
Objects, components, and witnesses
What is an object?
A swap object
The virtual machine home namespace
Virtual disks and snapshot delta-disks
Components
A witness
Connecting the dots
Internal building blocks of VSAN
Reliable datagram transport
Cluster monitoring, membership, and directory services
Cluster level object manager
The distributed object manager
The local log structured object manager
VSAN and high availability
A magnetic disk failure
A flash device failure
A host failure
Summary
7. Design Considerations and Guidelines
Network optimizations
Jumbo frames
Speed of the network interface
Network IO control
Isolation, shares, and limits
Quality of Service
Storage configuration optimizations
A flash device
Magnetic disks
I/O controllers
Cache-to-capacity ratio
Capacity
Performance
Availability
A scale-out design
Backing up your VSAN workloads
Creating a local backup through VDP
Creating a local backup to VMFS/NFS through VDP
Creating a remote backup through VDP
vSphere Replication to protect VSAN
Summary
8. Troubleshooting and Monitoring Utilities for Virtual SAN
Troubleshooting workflow
Validating the hardware and configuration limit
Understanding the software components of VSAN
The log structured object manager
The distributed object manager
Cluster monitoring, membership, and directory services
The ESXCLI namespace
Datastore
Network
Storage
Cluster
Policy
Other useful namespaces
esxcli vsan maintenancemode
esxcli vsan trace
cmmds-tool
vdq
Ruby vSphere Console
Manoeuvring around RVC
Command-line options with RVC
Enabling and disabling VSAN
Disk-related commands
Viewing the virtual machine layout
Viewing the physical disk layout
cmmds_find
resync.dashboard
VSAN Observer
Monitoring live statistics
Offline diagnosis
Interpreting VSOB data and key metrics
Summary
9. What's New in VSAN 6.0?
VSAN architecture types
Hybrid VSAN
All-flash VSAN
Disk group creation for an all-flash setup
Tagging flash capacity devices through ESXCLI
Tagging flash capacity devices through Ruby vSphere Client
Validation
Points to remember with all-flash VSAN
The new on-disk format
Snapshot enhancements
The fault domain
JBOD support
Serviceability improvements
LED locators
A what-if scenario
The rebalance operation
Scalability
Summary
Index
Getting Started with VMware Virtual SAN
Copyright © 2015 Packt Publishing
All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.
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