From a09e210b8eb339382452c4c124fdc0798b17ed96 Mon Sep 17 00:00:00 2001 From: Zack Brown Date: Wed, 14 Aug 2013 16:43:55 -0400 Subject: [PATCH] DOCS-1783: Backup documentation should cover need for journal files --- source/core/backups.txt | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/source/core/backups.txt b/source/core/backups.txt index 942a71a3b31..c60e49b6457 100644 --- a/source/core/backups.txt +++ b/source/core/backups.txt @@ -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