Design and Implementation: Any time delaying a message to explain the principles of
It does not exist all the time wheel data, storing the data portion is about to be executed.
Other data stored in each queue, a queue such as every hour. A time round is a data-hour, or less. Balance wheel a good time and memory footprint consumption traversal time round.
In the data from the queue in a time round deleted, maintaining the data set has not become large.
In order to prevent power-down, to save the task of executing the offset can restore the rest.