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  1. HBase
  2. HBASE-1730

Near-instantaneous online schema and table state updates

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Details

    • Improvement
    • Status: Closed
    • Critical
    • Resolution: Fixed
    • None
    • 0.92.0
    • None
    • None

    Description

      We should not need to take a table offline to update HCD or HTD.

      One option for that is putting HTDs and HCDs up into ZK, with mirror on disk catalog tables to be used only for cold init scenarios, as discussed on IRC. In this scheme, regionservers hosting regions of a table would watch permanent nodes in ZK associated with that table for schema updates and take appropriate actions out of the watcher. In effect, schema updates become another item in the ToDo list.

      /hbase/tables/<table-name>/schema

      Must be associated with a write locking scheme also handled with ZK primitives to avoid situations where one concurrent update clobbers another.

      Attachments

        1. 1730.patch
          30 kB
          Michael Stack
        2. 1730-v2.patch
          42 kB
          Michael Stack
        3. 1730-v3.patch
          191 kB
          Michael Stack
        4. HBASE-1730.patch
          37 kB
          Nileema Shingte
        5. HBASE-1730-2.patch
          35 kB
          Nicolas Spiegelberg

        Issue Links

          blocks

          Bug - A problem which impairs or prevents the functions of the product. HBASE-1636 disable and drop of table is flakey still

          • Major - Major loss of function.
          • Closed
          breaks

          Bug - A problem which impairs or prevents the functions of the product. HBASE-5359 Alter in the shell can be too quick and return before the table is altered

          • Major - Major loss of function.
          • Closed
          is part of

          Task - A task that needs to be done. HBASE-1816 Master rewrite

          • Blocker - Blocks development and/or testing work, production could not run
          • Closed
          is related to

          Improvement - An improvement or enhancement to an existing feature or task. HBASE-4213 Support for fault tolerant, instant schema updates with out master's intervention (i.e with out enable/disable and bulk assign/unassign) through ZK.

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

          Sub-task - The sub-task of the issue HBASE-1728 Column family scoping and cluster identification

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. HBASE-4729 Clash between region unassign and splitting kills the master

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

          Activity

            People

              nspiegelberg Nicolas Spiegelberg
              apurtell Andrew Kyle Purtell
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              Dates

                Created:
                Updated:
                Resolved: