DOCS-10928: --nojournal option warning for manual v3.4

Author: steveren

source/includes/extracts-manage-journaling.yaml

@@ -47,6 +47,8 @@ content: |
      :term:`replica set` member or backup, as described in :doc:`repair
      </tutorial/recover-data-following-unexpected-shutdown>`.
 
+     .. include:: /includes/warning-disable-journaling.rst
+
   To disable journaling, start :program:`mongod` with the
   :option:`--nojournal <mongod --nojournal>` command line option.
 ---

source/includes/options-mongod.yaml

@@ -606,8 +606,15 @@ name: nojournal
 args: null
 directive: option
 description: |
-  Disables the durability journaling. The {{program}} instance
-  enables journaling by default in 64-bit versions after v2.0.
+  Disables :doc:`/core/journaling`. :program:`mongod` enables
+  journaling by default.
+
+  Not available for mongod instances that use the
+  :doc:`in-memory storage engine </core/inmemory>`.
+
+  .. warning::
+
+     .. include:: /includes/warning-disable-journaling.rst
 post: |
   .. include:: /includes/not-available-for-inmemory-storage-engine.rst
 optional: true

source/includes/warning-disable-journaling.rst

@@ -0,0 +1,6 @@
+When running :program:`mongod` on a
+:doc:`replica set </core/replica-set-members>` with the
+WiredTiger :doc:`storage engine </core/storage-engines>`, if you
+turn off journaling with the :option:`--nojournal` option, you
+should also set the replica set configuration option
+:rsconf:`writeConcernMajorityJournalDefault` to ``false``.