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https://issues.apache.org/jira/browse/STORM-885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15018787#comment-15018787
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ASF GitHub Bot commented on STORM-885:
--------------------------------------
Github user d2r commented on a diff in the pull request:
https://github.com/apache/storm/pull/838#discussion_r45518313
--- Diff: storm-core/test/clj/org/apache/storm/pacemaker_test.clj ---
@@ -0,0 +1,242 @@
+;; Licensed to the Apache Software Foundation (ASF) under one
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+;; to you under the Apache License, Version 2.0 (the
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+(ns org.apache.storm.pacemaker-test
+ (:require [clojure.test :refer :all]
+ [org.apache.storm.pacemaker [pacemaker :as pacemaker]]
+ [conjure.core :as conjure])
+ (:import [backtype.storm.generated
+ HBExecutionException HBNodes HBRecords
--- End diff --
These three unused?
> Heartbeat Server (Pacemaker)
> ----------------------------
>
> Key: STORM-885
> URL: https://issues.apache.org/jira/browse/STORM-885
> Project: Apache Storm
> Issue Type: Improvement
> Components: storm-core
> Reporter: Robert Joseph Evans
> Assignee: Kyle Nusbaum
>
> Large highly connected topologies and large clusters write a lot of data into
> ZooKeeper. The heartbeats, that make up the majority of this data, do not
> need to be persisted to disk. Pacemaker is intended to be a secure
> replacement for storing the heartbeats without changing anything within the
> heartbeats. In the future as more metrics are added in, we may want to look
> into switching it over to look more like Heron, where a metrics server is
> running for each node/topology. And can be used to aggregate/per-aggregate
> them in a more scalable manor.
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