DOCS-15126-conflict-resolution-during-sharding (#47)

* DOCS-15126-conflict-resolution-during-sharding

* Review feedback

* Review feedback

Author: Dave Cuthbert

source/reference/mongosync.txt

@@ -161,6 +161,19 @@ source database is dropped at a later time. The ``<db>.system.profile``
 collection will not change the accuracy of user data on the
 destination.
 
+Sharded Clusters
+~~~~~~~~~~~~~~~~
+
+{+c2c-product-name+} supports replication between sharded clusters.
+Individual shards are replicated in parallel from the source cluster to
+the destination cluster, however a :ref:`chunk migration
+<sharding-chunk-migration>` or similar source update could move
+documents to a new source shard during replication.
+
+Even if documents move between source shards during replication,
+{+c2c-product-name+} maintains the :term:`eventual consistency`
+guarantee on the destination cluster.
+
 Views
 ~~~~~