Hadoop HDFS
  1. Hadoop HDFS
  2. HDFS-2699

Store data and checksums together in block file

    Details

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

      The current implementation of HDFS stores the data in one block file and the metadata(checksum) in another block file. This means that every read from HDFS actually consumes two disk iops, one to the datafile and one to the checksum file. This is a major problem for scaling HBase, because HBase is usually bottlenecked on the number of random disk iops that the storage-hardware offers.

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            • Assignee:
              dhruba borthakur
              Reporter:
              dhruba borthakur
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              • Created:
                Updated:

                Development