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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-10641) Introduce Coordination Engine interface
Date Mon, 25 Aug 2014 10:28:02 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-10641?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14108993#comment-14108993
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Steve Loughran commented on HADOOP-10641:
-----------------------------------------

oh, one more thing.. could you add the .tla file to the patch too. maybe we could start having
{{src/tla}} as the home for these files

> Introduce Coordination Engine interface
> ---------------------------------------
>
>                 Key: HADOOP-10641
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10641
>             Project: Hadoop Common
>          Issue Type: New Feature
>    Affects Versions: 3.0.0
>            Reporter: Konstantin Shvachko
>            Assignee: Plamen Jeliazkov
>         Attachments: HADOOP-10641.patch, HADOOP-10641.patch, HADOOP-10641.patch, HADOOP-10641.patch,
HADOOP-10641.patch, NNThroughputBenchmark Results.pdf, ce-tla.zip, hadoop-coordination.patch,
zkCEBenchmark.pdf, zkbench.pdf
>
>
> Coordination Engine (CE) is a system, which allows to agree on a sequence of events in
a distributed system. In order to be reliable CE should be distributed by itself.
> Coordination Engine can be based on different algorithms (paxos, raft, 2PC, zab) and
have different implementations, depending on use cases, reliability, availability, and performance
requirements.
> CE should have a common API, so that it could serve as a pluggable component in different
projects. The immediate beneficiaries are HDFS (HDFS-6469) and HBase (HBASE-10909).
> First implementation is proposed to be based on ZooKeeper.



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