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https://issues.apache.org/jira/browse/ACCUMULO-884?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13704696#comment-13704696
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Ben Popp commented on ACCUMULO-884:
-----------------------------------
Fusion IO's HBaseCon presentation quantifies the impact of enabling
short-circuit reads for HBase when running on their drives:
http://www.slideshare.net/fusionio/hbase-on-flash
> 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.
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