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https://issues.apache.org/jira/browse/HADOOP-10641?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Plamen Jeliazkov reassigned HADOOP-10641:
-----------------------------------------

    Assignee: Plamen Jeliazkov

> Introduce Coordination Engine
> -----------------------------
>
>                 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
>
> 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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