...
This sample demonstrates how to write streaming services capable of efficiently processing very large input messages typically encountered in batch style applications.
Timers
The timer sample demonstrates use of timer components to fire events at a specified interval. Two timers are deployed: a highly-available clustered singleton and a stateless timer that is deployed to all participants in a zone (cluster). The sample can be run on the single VM server or the distributed domain.
...
For more on timers, see Timer Components.
...