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Posted to notifications@accumulo.apache.org by "Dave Marion (JIRA)" <ji...@apache.org> on 2016/10/28 16:56:58 UTC
[jira] [Commented] (ACCUMULO-2222) add footnote to documentation
regarding rfile placement in HDFS in relation to tserver assignment
[ 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:
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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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