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DOCSP-48515-Source-destination-balancing #678

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Mar 26, 2025
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DOCSP-48515-Source-destination-balancing #678

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11 changes: 11 additions & 0 deletions source/reference/mongosync/mongosync-behavior.txt
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Expand Up @@ -113,6 +113,17 @@ destination cluster.
Chunk Distribution
''''''''''''''''''

.. important::

Even if the source cluster is balanced, ``mongosync`` doesn't
ensure balance of the destination cluster. Because ``mongosync``
doesn't support the execution of sharding operations during
migration, you must wait until it is safe to accept writes
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can we add the link to Limitations from this comment

once that change is added I am good to approve, thank you!

to rebalance the destination cluster. See :ref:`sharding-balancing`
for guidance on how to rebalance the cluster and
:ref:`sharded cluster limitations <c2c-sharded-limitations>`
for information on sharded cluster limitations in ``mongosync``.

``mongosync`` does not preserve chunk distribution from the source to
the destination, even with multiple ``mongosync`` instances. It is not
possible to reproduce a particular pre-split of chunks from a source
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