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  1. Hadoop HDFS
  2. HDFS-744

Support hsync in HDFS

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    Details

    • Type: New Feature
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 2.0.2-alpha
    • Component/s: datanode, hdfs-client
    • Labels:
      None
    • Hadoop Flags:
      Reviewed

      Description

      HDFS-731 implements hsync by default as hflush. As descriibed in HADOOP-6313, the real expected semantics should be "flushes out to all replicas and all replicas have done posix fsync equivalent - ie the OS has flushed it to the disk device (but the disk may have it in its cache)." This jira aims to implement the expected behaviour.

        Attachments

        1. hdfs-744.txt
          16 kB
          Lars Hofhansl
        2. HDFS-744-2.0-v1.patch
          26 kB
          Lars Hofhansl
        3. HDFS-744-2.0-v2.patch
          34 kB
          Lars Hofhansl
        4. HDFS-744-trunk.patch
          18 kB
          Lars Hofhansl
        5. HDFS-744-trunk-v2.patch
          19 kB
          Lars Hofhansl
        6. HDFS-744-trunk-v3.patch
          20 kB
          Lars Hofhansl
        7. HDFS-744-trunk-v4.patch
          21 kB
          Lars Hofhansl
        8. HDFS-744-trunk-v5.patch
          25 kB
          Lars Hofhansl
        9. HDFS-744-trunk-v6.patch
          34 kB
          Lars Hofhansl
        10. HDFS-744-trunk-v7.patch
          34 kB
          Lars Hofhansl
        11. HDFS-744-trunk-v8.patch
          34 kB
          Lars Hofhansl
        12. hdfs-744-v2.txt
          18 kB
          Lars Hofhansl
        13. hdfs-744-v3.txt
          28 kB
          Lars Hofhansl

          Issue Links

          breaks

          Bug - A problem which impairs or prevents the functions of the product. HDFS-3721 hsync support broke wire compatibility

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed
          is related to

          New Feature - A new feature of the product, which has yet to be developed. HADOOP-6313 Expose flush APIs to application users

          • Major - Major loss of function.
          • Closed

          New Feature - A new feature of the product, which has yet to be developed. HDFS-731 Support new Syncable interface in HDFS

          • Major - Major loss of function.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. HDFS-3979 Fix hsync semantics

          • Major - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. HBASE-5954 Allow proper fsync support for HBase

          • Critical - Crashes, loss of data, severe memory leak.
          • Resolved

          Improvement - An improvement or enhancement to an existing feature or task. HDFS-265 Revisit append

          • Major - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. HDFS-1783 Ability for HDFS client to write replicas in parallel

          • Major - Major loss of function.
          • Patch Available

            Activity

              People

              • Assignee:
                lhofhansl Lars Hofhansl
                Reporter:
                hairong Hairong Kuang
              • Votes:
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                Watchers:
                37 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: