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From "Amithsha (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-14546) Document block placement policies
Date Tue, 09 Jul 2019 04:51:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-14546?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16880930#comment-16880930
] 

Amithsha commented on HDFS-14546:
---------------------------------

[~elgoiri] Yes we should provide a subpage with details of all placement policies with architecture
and configurations to deploy.

But on this page, HdfsDesign.html providing high-level design and types about placement policies
will be better. Because while reading the arch of Hadoop and it's internal, placement types
will help users to consider their environment.

> Document block placement policies
> ---------------------------------
>
>                 Key: HDFS-14546
>                 URL: https://issues.apache.org/jira/browse/HDFS-14546
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Íñigo Goiri
>            Assignee: Amithsha
>            Priority: Major
>              Labels: documentation
>         Attachments: HDFS-14546-01.patch, HDFS-14546-02.patch, HDFS-14546-03.patch, HDFS-14546-04.patch,
HdfsDesign.patch
>
>
> Currently, all the documentation refers to the default block placement policy.
> However, over time there have been new policies:
> * BlockPlacementPolicyRackFaultTolerant (HDFS-7891)
> * BlockPlacementPolicyWithNodeGroup (HDFS-3601)
> * BlockPlacementPolicyWithUpgradeDomain (HDFS-9006)
> We should update the documentation to refer to them explaining their particularities
and probably how to setup each one of them.



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