I setup MongoDB on my Amazon EC2 instance knowing full well that it would have to be backed up at some point. I also knew that by using XFS, I could take advantage of filesystem freezing in a similar fashion to LVM snapshots. I had remembered reading about backups on XFS with MySQL being done with ec2-consistent-snapshot. As with any piece of open source software, it just took a little tweaking to make it do what I wanted it to do.
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