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DOCS-1783: Backup documentation should cover need for journal files #1184

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DOCS-1783: Backup documentation should cover need for journal files #1184

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8 changes: 8 additions & 0 deletions source/core/backups.txt
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Expand Up @@ -49,6 +49,14 @@ the following factors:
by including only crucial data in the most frequent backups and
backing up less crucial data less frequently.

.. warning::

In order to use filesystem snapshots for backups, your mongod
instance must have :setting:`journal` enabled, which is the default
for 64 bit versions of MongoDB since 2.0. If the journal sits on a
different filesystem than your data files then you must also disable
writes during the snapshot.

.. _backup-approaches:

Approaches to Backing Up MongoDB Systems
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