Showing posts with label Daylight Savings Time. Show all posts
Showing posts with label Daylight Savings Time. Show all posts

Monday, December 17, 2012

Orchestrator 2012 - Daylight Savings Time Scheduling Issue

I'm running a little behind on this post as Daylight Savings Time here in the US was back on Sunday, November 4.  For ease of example, all dates/times will reference the schedule for Daylight Savings in the United States.

There is an issue with scheduling Runbooks that start with the Monitor Date/Time activity during DST.

Daylight Saving Time (United States) 2012 began at 2:00 AM on Sunday, March 11.  At this time, 
the clocks would be moved ahead one hour to 3:00 AM.
  • This means any Runbooks scheduled to run between the hours of  2:00 AM - 3:00 AM would be skipped entirely.


Daylight Saving Time (United States) 2012 ended at 2:00 AM on Sunday, November 4.  At this time, 
the clocks would be moved back one hour to 1:00 AM.
  • This means any Runbooks schedule to run between the hours of 1:00 AM - 2:00 AM would run twice.

Depending on what the runbooks are executing, this could cause major issues and/or unscheduled downtime. It would also suggest Runbooks that are not set on an hourly interval (i.e. once daily) be scheduled outside of the hours of 1:00 AM - 3:00 AM to avoid any interruptions.  Unless you throw an exception into the schedule to work around the timing that the clocks are changed.