APRIL'S FOOL: Sorry that I have to admit it was just an April's Fool. The interesting fact btw is that when I first came up with the idea it sounded like totally implausible but while writing I realized "hey that should actually be possible". Maybe not yet for a map-reduce
Hazelcast is a distributed In-Memory-Datagrid written in Java. In addition to the internal features like EntryProcessors and queries you can write MapReduce tasks using the CastMapR projects which adds MapReduce capabilities on top of Hazelcast 3.x. To make it comparable to other MapReduce frameworks we will try to reimplement
A few days ago while porting our current system to Hazelcast 3 Snapshots I finally decided to start a MapReduce implementation for Hazelcast which I was missing for a long time. Whereas there always was a way to query IMaps in a distributed manner using Predicates I missed a solution