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  1. Hadoop HDFS
  2. HDFS-1034

Enhance datanode to read data and checksum file in parallel

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    Details

    • Type: Improvement
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: None
    • Labels:
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      Description

      In the current HDFS implementation, a read of a block issued to the datanode results in a disk access to the checksum file followed by a disk access to the checksum file. It would be nice to be able to do these two IOs in parallel to reduce read latency.

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          is related to

          Improvement - An improvement or enhancement to an existing feature or task. HDFS-918 Use single Selector and small thread pool to replace many instances of BlockSender for reads

          • Major - Major loss of function.
          • Open

          Improvement - An improvement or enhancement to an existing feature or task. HDFS-1599 Umbrella Jira for Improving HBASE support in HDFS

          • Major - Major loss of function.
          • Open

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              • Assignee:
                dhruba Dhruba Borthakur
                Reporter:
                dhruba Dhruba Borthakur
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                Dates

                • Created:
                  Updated: