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(DOCS-13786): Report the shard name of owning shard for split and mer… #5714

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Aug 19, 2021
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(DOCS-13786): Report the shard name of owning shard for split and mer… #5714

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2 changes: 1 addition & 1 deletion source/reference/command/mergeChunks.txt
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Expand Up @@ -110,7 +110,7 @@ satisfied.
Return Messages
---------------

On success, :dbcommand:`mergeChunks` returns to following document:
On success, :dbcommand:`mergeChunks` returns this document:

.. code-block:: javascript

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3 changes: 2 additions & 1 deletion source/reference/config-database.txt
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Expand Up @@ -136,7 +136,8 @@ to support sharding:
},
"lastmod" : Timestamp(1000, 2),
"lastmodEpoch" : ObjectId("<...>")
}
},
"owningShard" : "<value>"
}
}

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16 changes: 15 additions & 1 deletion source/release-notes/5.0.txt
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Expand Up @@ -501,6 +501,20 @@ Starting in MongoDB 5.0, when using the :dbcommand:`movePrimary` command
to remove a shard from a :ref:`sharded cluster <sharded-cluster>`,
writes to the original shard will generate an error message.

Split and Merge Chunk Changelogs Show Owning Shard
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Starting in MongoDB 5.0, documents in the :data:`config.changelog`
collection for
:manual:`split </tutorial/split-chunks-in-sharded-cluster/>` and
:manual:`merge </tutorial/merge-chunks-in-sharded-cluster/>` operations
contain an ``owningShard`` field. The ``owningShard`` field shows the
``shardId`` of the shard that owns the chunks that were split or
merged.

The ``owningShard`` field helps identify shards where split or merge
operations frequently occur.

.. _5.0-rel-notes-shell:

Shell Changes
Expand Down Expand Up @@ -674,7 +688,7 @@ memory usage for the :dbcommand:`validate` command.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Starting in MongoDB 5.0, you can use the
:parameter:`findChunksOnConfigTimeoutMS` parameter to change the timout
:parameter:`findChunksOnConfigTimeoutMS` parameter to change the timeout
for find operations on :data:`~config.chunks`.

Database Profiler ``filter`` Option
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4 changes: 3 additions & 1 deletion source/tutorial/split-chunks-in-sharded-cluster.txt
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Expand Up @@ -75,7 +75,9 @@ document as the lower bound in the new chunk:

sh.splitAt( "records.people", { "zipcode": "63109" } )

.. note:: :method:`~sh.splitAt()` does not necessarily split the chunk
.. note::

:method:`~sh.splitAt()` does not necessarily split the chunk
into two equally sized chunks. The split occurs at the location of
the document matching the query, regardless of where that document is
in the chunk.
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