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  1. Core Server
  2. SERVER-50027

Freeze migrations on original sharded collection while the resharding operation is in progress

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Details

    • Fully Compatible
    • Sharding 2020-09-21, Sharding 2020-10-05, Sharding 2020-10-19, Sharding 2020-11-02, Sharding 2020-11-16

    Description

      • disable the balancer
      • prohibit external users from causing migrations via moveChunk

      Add an optional isFrozen field  for each collection in config.collections.
      isFrozen = true overrules the noBalance field for the collection if specified (even if noBalance = false, isFrozen = true disallows the balancer from running)

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          causes

          Bug - A problem which impairs or prevents the functions of the product. SERVER-76004 Remove incorrect sharding tassert in getOwnershipFilter function

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

          Task - A task that needs to be done. SERVER-51891 Make ShardCollectionType not use strict parsing

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

          Bug - A problem which impairs or prevents the functions of the product. SERVER-53140 Ensure that allowMigrations setting gets copied over from the enqueued to the persisted sharding metadata when combining CollAndChangedChunks structs

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

          New Feature - A new feature of the product, which has yet to be developed. SERVER-56226 [v4.4] Introduce 'permitMigrations' field on config.collections entry to prevent chunk migrations from committing

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

          New Feature - A new feature of the product, which has yet to be developed. SERVER-56227 Add user-facing command to set allowMigrations to false for a sharded collection

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

          Task - A task that needs to be done. SERVER-58082 Fail resharding operation if allowMigrations has already been set to false

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

          Activity

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              kaloian.manassiev@mongodb.com Kaloian Manassiev
              blake.oler@mongodb.com Blake Oler
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              Dates

                Created:
                Updated:
                Resolved: