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https://issues.apache.org/jira/browse/BOOKKEEPER-612?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sijie Guo resolved BOOKKEEPER-612.
----------------------------------
    Resolution: Fixed

Issue resolved by merging pull request 56
            [https://github.com/apache/bookkeeper/pull/56]

            {noformat}
            commit bbd1eb8d8560b03834175fbd996b85237df09f5c
Author:     Robin Dhamankar <robin.dhaman...@gmail.com>
AuthorDate: Wed Oct 12 22:50:42 2016 -0700
Commit:     Sijie Guo <si...@apache.org>
CommitDate: Wed Oct 12 22:50:42 2016 -0700

    BOOKKEEPER-612: Region aware placement
    
    - Introduce the concept of a two level Network Topology with region as the 
first level and rack as the second level
    - NodeBase, Node and NetworkTopology manage this two level hierarchy and 
position of individual nodes in this hierarchy
    - An implementation of RegionawareEnsemblePlacementPolicy that distributes 
nodes across regions and within regions uses rack aware placement to place nodes
    
    This is a stacked diff (opening to start a review), we would still merge 
the dependent pull request first.
    
    Author: Robin Dhamankar <robindh@Robins-MacBook-Air.local>
    
    Reviewers: Sijie Guo <si...@apache.org>
    
    Closes #56 from robindh/RegionAwarePlacement

            {noformat}
            

> RegionAwarePlacement Policy
> ---------------------------
>
>                 Key: BOOKKEEPER-612
>                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-612
>             Project: Bookkeeper
>          Issue Type: Improvement
>          Components: bookkeeper-client
>            Reporter: Sijie Guo
>            Assignee: Robin Dhamankar
>             Fix For: 4.5.0
>
>
> after BOOKKEEPER-592, it would be better to let ack quorum cover at least of 
> two racks, so a rack failure would not make an entry unavailable.



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