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  1. Hadoop Common
  2. HADOOP-2656

Support for upgrading existing cluster to facilitate appends to HDFS files

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 0.18.0
    • None
    • None
    • Incompatible change, Reviewed
    • Associated a generation stamp with each block. On data nodes, the generation stamp is stored as part of the file name of the block's meta-data file.

    Description

      HADOOP-1700 describes the design for supporting appends to HDFS files. This design requires a distributed-upgrade to existing cluster installations. The design specifies that the DataNode persist the 8-byte BlockGenerationStamp in the block metadata file. The upgrade code will introduce this new field in the block metadata file and initialize this value to 0.

      Attachments

        1. upgradeGenStamp4.patch
          98 kB
          Dhruba Borthakur
        2. upgradeGenStamp5.patch
          109 kB
          Dhruba Borthakur
        3. upgradeGenStamp.patch
          44 kB
          Dhruba Borthakur
        4. upgradeGenStamp6.patch
          109 kB
          Dhruba Borthakur
        5. upgradeGenStamp7.patch
          110 kB
          Dhruba Borthakur
        6. upgradeGenStamp8.patch
          110 kB
          Dhruba Borthakur
        7. upgradeGenStamp9.patch
          110 kB
          Dhruba Borthakur
        8. upgradeGenStamp9.patch
          111 kB
          Dhruba Borthakur
        9. upgradeGenStamp10.patch
          108 kB
          Dhruba Borthakur
        10. upgradeGenStamp11.patch
          108 kB
          Dhruba Borthakur
        11. upgradeGenStamp12.patch
          107 kB
          Dhruba Borthakur

        Issue Links

          blocks

          New Feature - A new feature of the product, which has yet to be developed. HADOOP-1700 Append to files in HDFS

          • Major - Major loss of function.
          • Closed
          is blocked by

          Bug - A problem which impairs or prevents the functions of the product. HADOOP-2992 Sequential distributed upgrades.

          • Major - Major loss of function.
          • Closed
          is related to

          Bug - A problem which impairs or prevents the functions of the product. HADOOP-3388 TestDatanodeBlockScanner failed while trying to corrupt replicas

          • Major - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. HDFS-512 Set block id as the key to Block

          • Major - Major loss of function.
          • Closed

          Activity

            People

              dhruba Dhruba Borthakur
              dhruba Dhruba Borthakur
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              Dates

                Created:
                Updated:
                Resolved: