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    • Type: Sub-task
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: docs
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      Description

      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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              • Assignee:
                Unassigned
                Reporter:
                billie Billie Rinaldi
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                • Created:
                  Updated: