1. High Availability: A Contrarian View
Tech Ed North America 2010
12/3/2018 5:04 PM
Required Slide
SESSION CODE: ARC308
High Availability: A Contrarian View
Udi Dahan – The Software Simplist
Enterprise Development Expert & SOA Specialist
© 2010 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

2. High Availability – The Common View

3. Watching Out For Single-Points-Of-Failure

4. Disaster Recovery Planning – The Wrong Way

5. Agenda
Today
Problems
Solutions

6. Today: Current Solutions

7. Disaster Recovery Planning

8. Common Solutions and Technologies
Single Site
Multi Site
Failover
Data Loss
Cost
DB Clustering
Yes No
Automatic
None
High
Disk Mirroring
Mid
SAN Snapshots
Manual
Some
Log Shipping
Low
Replication
Minimal *
* No TX consistency

9. Software developers largely not involved

10. Except in deciding what to show the user…

11. Problems: What’s Missing?

12. Critical Windows Patch
Reliability
[HTTP] $$ Order DB
App Tx
Call 1 of 3
Call 2 of 3
Critical Windows Patch
Rollback
Where’s the order!?

13. When Deadlocks Happen Where’s the order!? DB App Tx [HTTP] $$ Order
Call 1 of 3
Call 2 of 3
Exception A B
Write to log
Where’s the order!?
Deadlock

14. Stop The World Upgrades

15. Solutions: Always-On Systems

16. Reliability … but what should we do if deserialization fails? Tx Q App
Rollback Tx
$$ Order Q
Receive
Rollback
App DB
Call 1 of 3
Call 2 of 3
The order is back in the queue

17. Reasons Why Deserialization Fails - Upgrades
V1 Message
V1 Client
V2 Server
There is valuable data in that message!

18. Error Queues & Poison Messages
Admin reverts to
previous version
manually returns msg Tx
$$ Order Q
Receive
App
Deserialization exception
V N-1
Move to error queue

19. Upgrading Servers V1 V2 DB V1 V1 V2 Q V2 V1 V2 V1 V2

20. Backwards Compatibility – The Crux Of It All

21. In Closing

22. What about the cloud?

23. High Availability Leads To High Agility

24. Thank you Udi Dahan – The Software Simplist
Tech Ed North America 2010
12/3/2018 5:04 PM
Required Slide
SESSION CODE: ARC308
Thank you
Udi Dahan – The Software Simplist
Enterprise Development Expert & SOA Specialist
© 2010 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

25. Resources Learning Required Slide www.microsoft.com/teched
Tech Ed North America 2010
12/3/2018 5:04 PM
Required Slide
Resources
Learning
Sessions On-Demand & Community
Microsoft Certification & Training Resources
Resources for IT Professionals
Resources for Developers
© 2010 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

26. Complete an evaluation on CommNet and enter to win!
Tech Ed North America 2010
12/3/2018 5:04 PM
Required Slide
Complete an evaluation on CommNet and enter to win!
© 2010 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

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28. Tech Ed North America 2010 12/3/2018 5:04 PM
© 2010 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.
© 2010 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

29. Required Slide Tech Ed North America 2010 12/3/2018 5:04 PM
© 2010 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.