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  1. Jackrabbit Oak
  2. OAK-1158 MVCC old revision cleanup
  3. OAK-1341

DocumentNodeStore: Implement revision garbage collection

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Details

    • Sub-task
    • Status: Closed
    • Minor
    • Resolution: Fixed
    • None
    • 0.20
    • mongomk
    • None

    Description

      For the MongoMK (as well as for other storage engines that are based on it), garbage collection is most easily implemented by iterating over all documents and removing unused entries (either whole documents, or data within the document).

      Iteration can be done in parallel (for example one process per shard), and it can be done in any order.

      The most efficient order is probably the id order; however, it might be better to iterate only over documents that were not changed recently, by using the index on the "_modified" property. That way we don't need to iterate over the whole repository over and over again, but just over those documents that were actually changed.

      Attachments

        Issue Links

          blocks

          Improvement - An improvement or enhancement to an existing feature or task. OAK-1560 Expose RevisionGCMBean for supported NodeStores

          • Major - Major loss of function.
          • Closed
          breaks

          Improvement - An improvement or enhancement to an existing feature or task. OAK-4372 VersionGarbageCollector uses more temporary memory than needed

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

          New Feature - A new feature of the product, which has yet to be developed. OAK-1160 Generic interfaces for operation tasks

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

          New Feature - A new feature of the product, which has yet to be developed. OAK-1158 MVCC old revision cleanup

          • Major - Major loss of function.
          • Resolved
          requires

          Bug - A problem which impairs or prevents the functions of the product. OAK-1586 Implement checkpoint support in DocumentNodeStore

          • Major - Major loss of function.
          • Closed

          Activity

            People

              chetanm Chetan Mehrotra
              thomasm Thomas Mueller
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              Dates

                Created:
                Updated:
                Resolved: