akka/akka — pull request #550 by patriknw (2012-06-19 10:35:12+00:00)
Title: Improve phi in AccrualFailureDetector, see #2066

* Implementation of phi according to the paper
* Config properties and documentation, min-std-deviation,
* acceptable-lost-heartbeats
* Restructure code, HeartbeatHistory is responsible for
stats from historical heartbeats
* Correct and efficient calculation of mean and standard
deviation
* More tests