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I'm a Windows Azure MVP, the principal developer for OakLeaf Systems and the author of 30+ books about Microsoft software. The books have more than 1.25 million English copies in print and have been translated into 20+ languages. Forbes Magazine ranked me seventh in their "Who Are The Top 20 Influencers in Big Data?" article of 2/3/2012. Roger has posted 37 posts at DZone. You can read more from them at their website. View Full User Profile

100% Uptime for May 2012 Azure Table Services Sample Project

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My live OakLeaf Systems Azure Table Services Sample Project demo runs two small Windows Azure Web role instances from Microsoft’s South Central US (San Antonio, TX) data center. This report now contains a full year of uptime data.

Here’s the usual Pingdom Monthly Report for April, which indicates service is back to normal after outage issues in April 2012.


Here’s the detailed uptime report from for May 2012:


This represents a considerable improvement in uptime over April 2012. My Flurry of Outages on 4/19/2012 for my Windows Azure Tables Demo in the South Central US Data Center post updated 4/30/2012 provides details about the outage on 4/19/2012 and its root cause analysis.

Following is detailed Pingdom response time data for the month of May 2012:


This is the twelfth uptime report for the two-Web role version of the sample project since it was upgraded to two instances. Reports will continue on a monthly basis.

Month Year Uptime Downtime Outages Response Time
May 2012 100.00% 00:00:00 0 775 ms
April 2012 99.28% 05:10:08 12 795 ms
March 2012 99.96% 00:20:00 1 767 ms
February 2012 99.92% 00:35:00 2 729 ms
January 2012 100.00% 00:00:00 0 773 ms
December 2011 100.00% 00:00:00 0 765 ms
November 2011 99.99% 00:05:00 1 708 ms
October 2011 99.99% 00:04:59 1 720 ms
September 2011 99.99% 00:05:00 1 743 ms
August 2011 99.98% 00:09:57 2 687 ms
July 2011 100.00% 00:00:00 0 643 ms
June 2011 100.00% 00:00:00 0 696 ms

The Azure Table Services Sample Project

See my Republished My Live Azure Table Storage Paging Demo App with Two Small Instances and Connect, RDP post of 5/9/2011 for more details of the Windows Azure test harness instance.


image_thumb7_thumbI believe this project is the oldest continuously running Windows Azure application. I first deployed it in November 2008 when I was writing Cloud Computing with the Windows Azure Platform for Wiley/WROX, which was the first book published about Windows Azure.

The application runs the default set of Windows Azure Diagnostics. About 5 GB of Event Counter data provides the source data for my Generating Big Data for Use with SQL Azure Federations and Apache Hadoop on Windows Azure Clusters post of 1/8/2012.

Published at DZone with permission of its author, Roger Jennings. (source)

(Note: Opinions expressed in this article and its replies are the opinions of their respective authors and not those of DZone, Inc.)


Fahmeed Nawaz replied on Tue, 2012/06/12 - 11:11am

You are correct, when using fsync with journaling on, the server will answer back to the driver after the journal entry is committed to disk (which may take up to 100ms) and doesnt care about data files.

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