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DOCSP-48609-add-mongosync-notes #691

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Mar 27, 2025
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DOCSP-48609-add-mongosync-notes #691

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DOCSP-48609-add-mongosync-notes
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3 changes: 3 additions & 0 deletions source/reference/limitations.txt
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Expand Up @@ -150,6 +150,9 @@ Sharded Clusters
returns an error and stops, which requires you to start the migration
from scratch.

- ``mongosync`` doesn't support running the command :dbcommand:`transitionFromDedicatedConfigServer`
during ``mongosync`` execution.

- You must not run the :dbcommand:`moveChunk` and
:dbcommand:`moveRange` commands on the source or destination clusters.
- The shard key cannot be :ref:`refined <shard-key-refine>` while
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11 changes: 11 additions & 0 deletions source/reference/mongosync/mongosync-behavior.txt
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Expand Up @@ -179,6 +179,17 @@ primary shard to each database by means of a round-robin.
restart the migration from the start. For more information, see
:ref:`c2c-sharded-limitations`.

Embedded Config Server Shards
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@FGasper FGasper Mar 25, 2025

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Is this a new term? I thought the term was just “config shard”.

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@gmiller-mdb gmiller-mdb Mar 25, 2025

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@FGasper that was the language that the ticket used, I'll ask the person who created it before I publish!

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@FGasper FGasper Mar 25, 2025

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@gmiller-mdb Example: https://www.mongodb.com/docs/manual/core/config-shard/

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@mvankeulen94 mvankeulen94 Mar 25, 2025 •
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thank you, Felipe! I'm fine to change the language to Config Shard cluster and link to that page

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@gmiller-mdb gmiller-mdb Mar 25, 2025

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@mvankeulen94 just made the changes! would you mind taking a last look? thanks!

'''''''''''''''''''''''''''''

Starting in 8.0, MongoDB introduces support for embedded config server shards.

``mongosync`` supports sync from dedicated config server sharded clusters to
embedded config server sharded clusters and vice versa. Additionally, ``mongosync``
supports sync from replica sets to embedded config sharded clusters.

For more information, see :ref:`config-shard-concept`.

Multiple Clusters
~~~~~~~~~~~~~~~~~

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