storm-user mailing list archives

In the article (http://www.michael-noll.com/blog/2013/01/18/implementing-real-time-trending-topics-in-storm/)
and I was wondering what the rationale was for the emit frequencies
and how they all relate to each other.

In the example the RollingCountBolt emits every 3 seconds,
IntermediateRankingBolt every 2 seconds and TotalRankingBolt every 2
seconds. Does this mean that the rolling counts for the last 9 events
are ranked and emitted every 2 seconds? 7 seconds? A little confused.

Thanks