rackerlabs/blueflood — pull request #261 by fourk (2014-02-21 21:16:50+00:00)
Title: Stop rolling up slots for which shard ownership has changed

If shard ownership has changed, trust that the node that owns the shard will roll it up.

If there is a delay between scheduling of a slot and running rollups for that slow, there is a potential for multiple nodes to be duplicating work.