Hive
  1. Hive
  2. HIVE-720

Improve ByteStream by removing all synchronized method calls

    Details

    • Type: Improvement Improvement
    • Status: Closed
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.4.0
    • Component/s: None
    • Labels:
      None
    • Hadoop Flags:
      Reviewed
    • Release Note:
      Hide
      HIVE-720. Improve ByteStream by removing all synchronized method calls. (Yongqiang He via zshao)
      Show
      HIVE-720 . Improve ByteStream by removing all synchronized method calls. (Yongqiang He via zshao)

      Description

      org.apache.hadoop.hive.serde2.ByteStream has 2 inner classes: Input and Output, which inherits from ByteArrayInputStream and ByteArrayOutputStream.
      Both these classes have a lot of sychronized methods, which make them really slow.

      We should let ByteStream.Input and ByteStream.Output directly inherit InputStream and OutputStream so we don't need to call synchronized methods at all. This will help LazySimpleSerDe, ColumnarSerDe as well as LazyBinarySerDe.

      1. HIVE-720.1.patch
        12 kB
        He Yongqiang
      2. HIVE-720.2.patch
        45 kB
        He Yongqiang

        Activity

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          People

          • Assignee:
            He Yongqiang
            Reporter:
            Zheng Shao
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            Dates

            • Created:
              Updated:
              Resolved:

              Development