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  1. Hadoop HDFS
  2. HDFS-14313

Get hdfs used space from FsDatasetImpl#volumeMap#ReplicaInfo in memory instead of df/du

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Details

    • Improvement
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • 2.6.0, 2.7.0, 2.8.0, 2.9.0, 3.0.0, 3.1.0
    • 2.10.0, 3.0.4, 3.3.0, 3.1.4, 3.2.2
    • datanode, performance
    • None
    • Reviewed

    Description

      There are two ways of DU/DF getting used space that are insufficient.

      1.  Running DU across lots of disks is very expensive and running all of the processes at the same time creates a noticeable IO spike.
      2.  Running DF is inaccurate when the disk sharing by multiple datanode or other servers.

       Getting hdfs used space from  FsDatasetImpl#volumeMap#ReplicaInfos in memory is very small and accurate. 

      Attachments

        1. HDFS-14313-branch-2.v2.patch
          27 kB
          Lisheng Sun
        2. HDFS-14313-branch-2.v1.patch
          27 kB
          Lisheng Sun
        3. HDFS-14313.branch-3.v1.patch
          27 kB
          Lisheng Sun
        4. HDFS-14313.branch-3.2.patch
          25 kB
          Wei-Chiu Chuang
        5. HDFS-14313.branch-3.1.patch
          26 kB
          Wei-Chiu Chuang
        6. HDFS-14313.branch-3.0.v2.patch
          27 kB
          Lisheng Sun
        7. HDFS-14313.branch-3.0.v1.patch
          54 kB
          Lisheng Sun
        8. HDFS-14313.014.patch
          26 kB
          Lisheng Sun
        9. HDFS-14313.013.patch
          23 kB
          Lisheng Sun
        10. HDFS-14313.012.patch
          23 kB
          Lisheng Sun
        11. HDFS-14313.011.patch
          22 kB
          Lisheng Sun
        12. HDFS-14313.010.patch
          22 kB
          Lisheng Sun
        13. HDFS-14313.009.patch
          20 kB
          Lisheng Sun
        14. HDFS-14313.008.patch
          20 kB
          Lisheng Sun
        15. HDFS-14313.007.patch
          26 kB
          Lisheng Sun
        16. HDFS-14313.006.patch
          25 kB
          Lisheng Sun
        17. HDFS-14313.005.patch
          24 kB
          Lisheng Sun
        18. HDFS-14313.004.patch
          24 kB
          Lisheng Sun
        19. HDFS-14313.003.patch
          23 kB
          Lisheng Sun
        20. HDFS-14313.002.patch
          23 kB
          Lisheng Sun
        21. HDFS-14313.001.patch
          23 kB
          Lisheng Sun
        22. HDFS-14313.000.patch
          32 kB
          Lisheng Sun

        Issue Links

          causes

          Bug - A problem which impairs or prevents the functions of the product. HDFS-14986 ReplicaCachingGetSpaceUsed throws ConcurrentModificationException

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

          Improvement - An improvement or enhancement to an existing feature or task. HDFS-15174 Optimize ReplicaCachingGetSpaceUsed by reducing unnecessary io operations

          • Major - Major loss of function.
          • Resolved

          Improvement - An improvement or enhancement to an existing feature or task. HDFS-15039 Cache meta file length of FinalizedReplica to reduce call File.length()

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Resolved
          relates to

          Sub-task - The sub-task of the issue HADOOP-12973 make DU pluggable

          • Major - Major loss of function.
          • Resolved

          Sub-task - The sub-task of the issue HADOOP-12974 Create a CachingGetSpaceUsed implementation that uses df

          • Major - Major loss of function.
          • Resolved

          Improvement - An improvement or enhancement to an existing feature or task. HADOOP-9884 Hadoop calling du -sk is expensive

          • Major - Major loss of function.
          • Resolved
          links to

          Web Link GitHub Pull Request #1011

          Activity

            People

              leosun08 Lisheng Sun
              leosun08 Lisheng Sun
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              Dates

                Created:
                Updated:
                Resolved: