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  1. HBase
  2. HBASE-6055 Offline Snapshots in HBase 0.96
  3. HBASE-7365

Safer table creation and deletion using .tmp dir

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    Details

    • Type: Sub-task
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.95.0
    • Component/s: master
    • Labels:
      None
    • Hadoop Flags:
      Reviewed

      Description

      Currently tables are created in the root directory, and the removal works on the root directory.
      Change the code to use a /hbase/.tmp directory to make the creation and removal a bit safer

      Table Creation steps

      • Create the table descriptor (table folder, in /hbase/.tmp/)
      • Create the table regions (always in temp)
      • Move the table from temp to the root folder
      • Add the regions to meta
      • Trigger assignment
      • Set enable flag in ZooKeeper

      Table Deletion steps

      • Wait for regions in transition
      • Remove regions from meta (use bulk delete)
      • Move the table in /hbase/.tmp
      • Remove the table from the descriptor cache
      • Remove table from zookeeper
      • Archive the table

      The main changes in the current code are:

      • Writing to /hbase/.tmp and then rename
      • using bulk delete in DeletionTableHandler

        Attachments

        1. 7365-v4.patch
          23 kB
          Ted Yu
        2. HBASE-7365-v0.patch
          21 kB
          Matteo Bertozzi
        3. HBASE-7365-v1.patch
          24 kB
          Matteo Bertozzi
        4. HBASE-7365-v2.patch
          24 kB
          Matteo Bertozzi
        5. HBASE-7365-v3.patch
          24 kB
          Matteo Bertozzi

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              • Assignee:
                mbertozzi Matteo Bertozzi
                Reporter:
                mbertozzi Matteo Bertozzi
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                Dates

                • Created:
                  Updated:
                  Resolved: