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Jan 15, 2013
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Update source/administration/sharding.txt #560

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8 changes: 8 additions & 0 deletions source/administration/sharding.txt
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Expand Up @@ -595,6 +595,14 @@ insert operation, and can only migrate a single chunk at a time. Chunk
migrations are resource intensive and further complicated by large
write volume to the migrating chunk.

.. warning::

Pre-splitting can only be performed on an empty collection.
When you enable sharding for a collection containing data the
collection will be automatically split for you. Subsequent
attempts to pre-split as below may lead to strange and
unpredictable chunk ranges and sizes.

To create and migrate chunks manually, use the following procedure:

#. Split empty chunks in your collection by manually performing
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