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From "Dave Marion (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-2222) add footnote to documentation regarding rfile placement in HDFS in relation to tserver assignment
Date Fri, 28 Oct 2016 16:56:58 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-2222?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15615945#comment-15615945
] 

Dave Marion commented on ACCUMULO-2222:
---------------------------------------

This may not be true depending on the configuration. https://issues.apache.org/jira/browse/HDFS-3702


> add footnote to documentation regarding rfile placement in HDFS in relation to tserver
assignment
> -------------------------------------------------------------------------------------------------
>
>                 Key: ACCUMULO-2222
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-2222
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: docs
>            Reporter: Arshak Navruzyan
>
> suggest adding a footnote to "2.3.1. Tablet Server."  Perhaps something like this:
> HDFS's block placement policy determines which data nodes will hold a replica of the
Accumulo RFile.  The default HDFS placement policy is to put one replica on one node in the
local rack, another on a node in a different (remote) rack, and the last on a different node
in the same remote rack.  (http://hadoop.apache.org/docs/stable1/hdfs_design.html) 
> This generally ensures that the server assigned to a particular tablet will be a HDFS
replication location for the tablet's underlying RFile. 



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