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9 changes: 5 additions & 4 deletions source/reference/command/movePrimary.txt
Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,10 @@ movePrimary

In a :term:`shard cluster`, this command reassigns the database's
primary shard. The primary shard for a database holds all
un-sharded collections in the database.
un-sharded collections in the database. :dbcommand:`movePrimary`
is an administrative command that is only available for
:program:`mongos` instances and is intended to be used when
removing a shard from a shard cluster.

:dbcommand:`movePrimary` changes the primary shard for this
database in the cluster metadata, and migrates all un-sharded
Expand Down Expand Up @@ -36,6 +39,4 @@ movePrimary
:dbcommand:`movePrimary` your shard cluster may have orphaned
and unreachable data.

:dbcommand:`movePrimary` is an administrative command that is
only available for :program:`mongos` instances.

.. seealso:: :doc:`/tutorial/remove-shards-from-cluster`