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DOCS-9801 advise backing up FTDC data before resync #4973

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Feb 22, 2021
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DOCS-9801 advise backing up FTDC data before resync #4973

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12 changes: 9 additions & 3 deletions source/tutorial/resync-replica-set-member.txt
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Expand Up @@ -79,10 +79,16 @@ perform an initial sync by restarting the instance without the contents of the
method from the :binary:`~bin.mongo` shell or on Linux systems, the
:option:`mongod --shutdown` option.

2. Delete all data and sub-directories from the member's
:setting:`~storage.dbPath` directory. Consider making a backup first.
2. (Optional) Make a backup of all data and sub-directories from the
member's :setting:`~storage.dbPath` directory. If a full backup is
not required, consider backing up just the ``diagnostic.data``
directory to preserve potentially-useful troubleshooting data in the
event of an issue. See :ref:`ftdc-stub` for more information.

3. :doc:`Start the mongod process </tutorial/manage-mongodb-processes>`,
3. Delete all data and sub-directories from the member's
:setting:`~storage.dbPath` directory.

4. :doc:`Start the mongod process </tutorial/manage-mongodb-processes>`,
specifying :ref:`cli-mongod-replica-set` as appropriate.

At this point, the :binary:`~bin.mongod` performs an initial sync. The length of
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