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Author: mayaraman19

source/includes/fact-mongosync-balancer.rst

@@ -6,19 +6,10 @@
    the cluster level and for collections outside the namespace filter. 
    You must also stop the destination cluster's balancer.
 
-   If you enable the source cluster's balancer but do not use a
-   namespace filter, or if you disable the balancer for all
-   collections within the namespace filter, ``mongosync`` fails.
-
    During migration, do not run the :dbcommand:`moveChunk` or 
    :dbcommand:`moveRange` commands. If you have enabled the source cluster's
    balancer, but disabled it for collections within the namespace
    filter, do not run :dbcommand:`shardCollection` on collections
-   within the namespace filter.
-
-   To stop the balancer, run the :dbcommand:`balancerStop` command 
-   and wait for the command to complete.
-     
-   After stopping the balancer, wait fifteen minutes before
-   starting ``mongosync``. This gives the cluster time to
-   finish any in progress chunk migrations.
+   within the namespace filter. If you run :dbcommand:`shardCollection` on 
+   collections within the namespace filter during the migration, ``mongosync``
+   returns an error and stops.

source/reference/mongosync/mongosync-behavior.txt

@@ -125,6 +125,17 @@ namespace filter by running the :dbcommand:`setAllowMigrations` command:
 Run the preceding command for every collection within the
 namespace filter.
 
+Then, run the :dbcommand:`balancerStop` command to stop
+the balancer on the destination cluster and wait for the command to complete.
+
+After stopping the balancer, wait fifteen minutes before
+starting ``mongosync``. This gives the cluster time to
+finish any in progress chunk migrations.
+
+If you enable the source cluster's balancer but do not use a
+namespace filter, or if you disable the balancer for all
+collections within the namespace filter, ``mongosync`` fails.
+
 Pre-Split Chunks
 ''''''''''''''''