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  1. Core Server
  2. SERVER-42022

Attempt to remove initial sync missing document fetching

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Details

    • Task
    • Status: Closed
    • Major - P3
    • Resolution: Fixed
    • None
    • 4.3.1
    • Replication
    • None
    • Fully Compatible
    • Repl 2019-07-15, Repl 2019-08-26

    Description

      We currently think this was only necessary for mmapv1 when updates could cause a collection scan to miss a document. If we could remove this step, it could significantly speed up initial sync in certain workloads and simplify initial sync.

      This would require the storage engine API to prohibit updates from causing collection scans to miss a document.

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          is depended on by

          Bug - A problem which impairs or prevents the functions of the product. SERVER-26780 SyncTail::getMissingDoc() should retry on SocketExceptions

          • Major - P3 - Major loss of function.
          • Closed
          is documented by

          Task - A task that needs to be done. DOCS-12975 Investigate changes in SERVER-42022: Attempt to remove initial sync missing document fetching

          • Major - P3 - Major loss of function.
          • Closed
          is related to

          Bug - A problem which impairs or prevents the functions of the product. SERVER-21057 Collection scan during concurrent move-update can return invalid results, trip fatal assertion (mmapv1 only)

          • Critical - P2 - Crashes, loss of data, severe memory leak.
          • Closed
          related to

          Improvement - An improvement or enhancement to an existing feature or task. SERVER-15410 Batch fetch missing documents during initial sync, with retries

          • Major - P3 - Major loss of function.
          • Closed

          Activity

            People

              jesse@mongodb.com A. Jesse Jiryu Davis
              judah.schvimer@mongodb.com Judah Schvimer
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              Dates

                Created:
                Updated:
                Resolved: