You are viewing a plain text version of this content. The canonical link for it is here.
Posted to notifications@accumulo.apache.org by "Eric Newton (JIRA)" <ji...@apache.org> on 2013/04/22 18:33:16 UTC
[jira] [Updated] (ACCUMULO-884) Take advantage of short circuit
read for local files
[ https://issues.apache.org/jira/browse/ACCUMULO-884?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Eric Newton updated ACCUMULO-884:
---------------------------------
Fix Version/s: (was: 1.5.0)
> Take advantage of short circuit read for local files
> ----------------------------------------------------
>
> Key: ACCUMULO-884
> URL: https://issues.apache.org/jira/browse/ACCUMULO-884
> Project: Accumulo
> Issue Type: Improvement
> Components: docs
> Reporter: Billie Rinaldi
> Assignee: Keith Turner
>
> This is a new feature in hadoop 1.0.x and some versions of 0.22 and 0.23. It allows a client to read directly from disk instead of through a DataNode when the data is stored locally. Enabling it involves setting two configuration parameters, the first in hdfs-site.xml and the second in accumulo-site.xml. We should make sure this works with Accumulo and recommend it in the documentation.
> - dfs.block.local-path-access.user is the key in datanode configuration to specify the user allowed to do short circuit read.
> - dfs.client.read.shortcircuit is the key to enable short circuit read at the client side configuration.
> See HDFS-2246 and http://hbase.apache.org/book/perf.hdfs.configs.html for more information.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira