The Windows Azure Team started the new year right with no outages for a month’s operation of the test harness!
Following is the Pingdom monthly report for a single instance of the OakLeaf Systems Windows Azure Table Test Harness running in Microsoft’s South Central US (San Antonio) data center:
Following are monthly uptime results for Windows Azure since it began commercial operation on January 4, 2010:
|2010||Jan||99.75%||1h 50m 02s||13||735ms|
|2010||Feb||99.99%||0h 04m 19s||1||734ms|
|2010||Mar||99.98%||0h 10m 00s||2||737ms|
|2010||Apr||99.71%||2h 05m 01s||6||782ms|
|2010||May||99.65%||2h 29m 59s||8||669ms|
|2010||Jun||99.65%||2h 29m 59s||8||660ms|
|2010||Jul||99.70%||2h 15m 01s||11||526ms|
|2010||Aug||99.96%||0h 19m 58s||3||521ms|
|2010||Sep||99.94%||0h 19m 57s||5||521ms|
|2010||Oct||99.91%||0h 40m 01s||2||535ms|
|2010||Dec||99.90%||0h 44m 59s||3||670ms|
|2011||Jan||100.00%||0h 0m 0s||0||703ms|
Note: Data for November 2010 is missing because the test harness became inoperable for a few days due to lack of support for the original Microsoft.Samples.ServiceHosting.StorageClient library, which was replaced by Microsoft.WindowsAzure.StorageClient.dll from the Windows Azure SDK v1.3. See my Updated Source Code for OakLeaf Systems’ Azure Table Services Sample Project Available to Download post of 11/17/2010 for more details and downloadable source code.
Note: The OakLeaf test harness is not subject to Microsoft’s 99.9% availability Service Level Agreement (SLA), which requires two running instances. The project runs in a single Small compute instance.
Lack of system upgrades during February and March would explain the higher uptime percentage.