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  1. HBase
  2. HBASE-21185

WALPrettyPrinter: Additional useful info to be printed by wal printer tool, for debugability purposes

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    • Hadoop Flags:
      Reviewed
    • Release Note:
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      This adds two extra features to WALPrettyPrinter tool:

      1) Output for each cell combined size of cell descriptors, plus the cell value itself, in a given WAL edit. This is printed on the results as "cell total size sum:" info by default;

      2) An optional -g/--goto argument, that allows to seek straight to that specific WAL file position, then sequentially reading the WAL from that point towards its end;
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      This adds two extra features to WALPrettyPrinter tool: 1) Output for each cell combined size of cell descriptors, plus the cell value itself, in a given WAL edit. This is printed on the results as "cell total size sum:" info by default; 2) An optional -g/--goto argument, that allows to seek straight to that specific WAL file position, then sequentially reading the WAL from that point towards its end;

      Description

      WALPrettyPrinter is very useful for troubleshooting wal issues, such as faulty replication sinks. An useful information one might want to track is the size of a single WAL entry edit, as well as size for each edit cell. Am proposing a patch that adds calculations for these two, as well an option to seek straight to a given position on the WAL file being analysed.

        Attachments

        1. HBASE-21185.master.001.patch
          3 kB
          Wellington Chevreuil
        2. HBASE-21185.master.002.patch
          3 kB
          Wellington Chevreuil
        3. HBASE-21185.master.003.patch
          3 kB
          Wellington Chevreuil
        4. HBASE-21185.branch-1.4.001.patch
          3 kB
          Wellington Chevreuil

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            • Assignee:
              wchevreuil Wellington Chevreuil
              Reporter:
              wchevreuil Wellington Chevreuil
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              • Created:
                Updated:
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