DOCSP-28521 Sharded Backup Note (#2695)

* DOCSP-28521 Adds note for backing up sharded clusters

* Fixes formatting

* Fixes per Dave

Author: kennethdyer

source/includes/fact-backup-shard.rst

@@ -0,0 +1,18 @@
+
+.. note::
+
+   Disabling the balancer is only necessary when **manually** taking backups,
+   either by calling :program:`mongodump` or scheduling a task that calls
+   ``mongodump`` at a specific time.
+
+   You do **not** have to disable the balancer when using coordinated backup
+   and restore processes:
+
+   - `MongoDB Atlas <https://www.mongodb.com/cloud/atlas?tck=docs_server>`_
+
+   - `MongoDB Cloud Manager
+     <https://www.mongodb.com/cloud/cloud-manager?tck=docs_server>`_
+   
+   - `MongoDB Ops Manager
+     <https://www.mongodb.com/products/ops-manager?tck=docs_server>`_
+ 

source/tutorial/manage-sharded-cluster-balancer.txt

@@ -196,6 +196,8 @@ re-enable it:
 Disable Balancing During Backups
 --------------------------------
 
+.. include:: /includes/fact-backup-shard
+
 If MongoDB migrates a :term:`chunk` during a :doc:`backup
 </core/backups>`, you can end with an inconsistent snapshot
 of your :term:`sharded cluster`. Never run a backup while the balancer is

source/tutorial/schedule-backup-window-for-sharded-clusters.txt

@@ -22,7 +22,11 @@ distributing sharded data around the cluster, so that each
 However, when creating backups from a sharded cluster it is important
 that you disable the balancer while taking backups to ensure that no
 chunk migrations affect the content of the backup captured by the
-backup procedure. Using the procedure outlined in the section
+backup procedure. 
+
+.. include:: /includes/fact-backup-shard
+
+Using the procedure outlined in the section
 :ref:`sharding-balancing-disable-temporarily` you can manually stop the
 balancer process temporarily. As an alternative, you can
 use the following procedure to define a balancing window so that the