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Microsoft Hyper-V Cluster Design

You're reading from   Microsoft Hyper-V Cluster Design To achieve a Windows Server system that virtually takes care of itself, you need to master Hyper-V cluster design. This book is the perfect tutorial on the subject, providing clear instruction on expanding into the virtualized environment.

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Product type Paperback
Published in Oct 2013
Publisher
ISBN-13 9781782177685
Length 462 pages
Edition 1st Edition
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Author (1):
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Eric Siron Eric Siron
Author Profile Icon Eric Siron
Eric Siron
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Toc

Table of Contents (14) Chapters Close

Preface 1. Hyper-V Cluster Orientation FREE CHAPTER 2. Cluster Design and Planning 3. Constructing a Hyper-V Server Cluster 4. Storage Design 5. Network Design 6. Network Traffic Shaping and Performance Enhancements 7. Memory Planning and Management 8. Performance Testing and Load Balancing 9. Special Cases 10. Maintaining and Monitoring a Hyper-V Server Cluster 11. High Availability 12. Backup and Disaster Recovery Index

Quorum

A major concern in an automated failover system is the split-brain scenario. This occurs when two or more resource controllers believe they are in control of the only running instance of that resource. This is also known as a partitioned cluster. In the case of clustered Hyper-V Servers, such a situation would look like the following figure:

Quorum

In the figure, the hosts cannot see each other, so each assumes that the other is down and starts the highly available virtual machine. Clients connect and begin making updates to two separate database copies, resulting in modifications that may be irreconcilable. Fortunately, this situation is practically impossible for most virtual machines. Even if multiple nodes try to bring the same virtual machines online, only one will be able to use its files, most importantly its VHDs, which exist on shared storage. For the virtual machines that use pass-through disks, the outcome isn't as clear. Some multisite clusters use replication technologies...

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