Github user d2r commented on a diff in the pull request: https://github.com/apache/storm/pull/838#discussion_r45128439 --- Diff: docs/documentation/Pacemaker.md --- @@ -0,0 +1,89 @@ +# Pacemaker + +### Introduction +Pacemaker is a storm daemon designed to process heartbeats from workers. As Storm is scaled up, ZooKeeper begins to become a bottleneck due to high volumes of writes from workers doing heartbeats. Lots of writes to disk and traffic across the network is generated as ZooKeeper tries to maintain consistency. --- End diff -- `Lots of writes to disk and lots of traffic`...
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