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https://issues.apache.org/jira/browse/STORM-885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15018561#comment-15018561
]
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_r45505380
--- Diff:
storm-core/src/clj/backtype/storm/cluster_state/zookeeper_state_factory.clj ---
@@ -0,0 +1,157 @@
+;; Licensed to the Apache Software Foundation (ASF) under one
+;; or more contributor license agreements. See the NOTICE file
+;; distributed with this work for additional information
+;; regarding copyright ownership. The ASF licenses this file
+;; to you under the Apache License, Version 2.0 (the
+;; "License"); you may not use this file except in compliance
+;; with the License. You may obtain a copy of the License at
+;;
+;; http://www.apache.org/licenses/LICENSE-2.0
+;;
+;; Unless required by applicable law or agreed to in writing, software
+;; distributed under the License is distributed on an "AS IS" BASIS,
+;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+;; See the License for the specific language governing permissions and
+;; limitations under the License.
+
+(ns backtype.storm.cluster-state.zookeeper-state-factory
+ (:import [org.apache.curator.framework.state ConnectionStateListener])
+ (:import [org.apache.zookeeper KeeperException
KeeperException$NoNodeException ZooDefs ZooDefs$Ids ZooDefs$Perms]
+ [backtype.storm.cluster ClusterState ClusterStateContext
DaemonType])
+ (:use [backtype.storm cluster config log util])
+ (:require [backtype.storm [zookeeper :as zk]])
+ (:gen-class
+ :implements [backtype.storm.cluster.ClusterStateFactory]))
--- End diff --
Unused imports?
* `KeeperException`
* `ZooDefs`
* `ZooDefs$Ids`
* `ZooDefs$Perms`
* `ClusterStateContext`
> 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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