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Posted to notifications@accumulo.apache.org by "Arshak Navruzyan (JIRA)" <ji...@apache.org> on 2014/01/18 01:18:21 UTC
[jira] [Created] (ACCUMULO-2222) add footnote to documentation
regarding rfile placement in HDFS in relation to tserver assignment
Arshak Navruzyan created ACCUMULO-2222:
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Summary: 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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