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Microsoft Windows Azure Development Cookbook

You're reading from   Microsoft Windows Azure Development Cookbook Realize the full potential of Windows Azure with this superb Cookbook that has over 80 recipes for building advanced, scalable cloud-based services. Simply pick the solutions you need to answer your requirements immediately.

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Product type Paperback
Published in Aug 2011
Publisher Packt
ISBN-13 9781849682220
Length 392 pages
Edition 1st Edition
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Author (1):
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Neil Mackenzie Neil Mackenzie
Author Profile Icon Neil Mackenzie
Neil Mackenzie
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Table of Contents (16) Chapters Close

Microsoft Windows Azure Development Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
1. Controlling Access in the Windows Azure Platform FREE CHAPTER 2. Handling Blobs in Windows Azure 3. Going NoSQL with Windows Azure Tables 4. Disconnecting with Windows Azure Queues 5. Developing Hosted Services for Windows Azure 6. Digging into Windows Azure Diagnostics 7. Managing Hosted Services with the Service Management API 8. Using SQL Azure 9. Looking at the Windows Azure AppFabric Index

Managing upgrades and changes to a hosted service


Windows Azure instances and the Guest OS they reside in have to be upgraded occasionally. The hosted service may need a new software deployment or a configuration change. The Guest OS may need a patch or an upgrade to a new version. To ensure that a hosted service can remain online 24*7, Windows Azure provides an upgrade capability that allows upgrades to be performed without stopping the hosted service completely, as long as each role in the service has two or more instances.

Windows Azure supports two types of upgrade: in-place upgrade and Virtual IP (VIP) swap. An in-place upgrade applies changes to the configuration and code of existing virtual machines (VM) hosting instances of the hosted service. A VIP swap modifies the load-balancer configuration, so that the VIP address of the production deployment is pointed at the instances currently in the staging slot and the VIP address of the staging deployment is pointed at the instances currently...

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