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DOCS-4682 - add mentions of config file invocation of wiredTiger #2115

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DOCS-4682 - add mentions of config file invocation of wiredTiger #2115

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3 changes: 2 additions & 1 deletion source/includes/options-mongod.yaml
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Expand Up @@ -1542,7 +1542,8 @@ directive: option
description: |
.. versionadded:: 2.8.0

Specifies the storage engine for the {{program}} database.
Specifies the storage engine for the {{program}} database. Valid
options include ``mmapv1`` and ``wiredTiger``.
post: |
If you attempt to start a {{program}} with a
:option:`storage.dbPath` that contains data files produced by a
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10 changes: 9 additions & 1 deletion source/release-notes/2.8.txt
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Expand Up @@ -48,9 +48,17 @@ To enable WiredTiger, start MongoDB with the following option:

mongod --storageEngine wiredTiger

or by specifying the following value in the configuration file:

.. code-block:: yaml

storage:
engine: wiredTiger

If you attempt to start a :program:`mongod` with a
:setting:`storage.dbPath` that contains data files produced by a
storage engine other than the one specified by ``--storageEngine``,
storage engine other than the one specified by ``--storageEngine``
or the ``storage.engine`` configuration file option,
:program:`mongod` will refuse to start.

The behavior and properties of the ``wiredTiger`` storage engine are
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