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How well did it work for restoring?

For me, the ability to mount a backup and look at a particular file proved to be important. Also, I restored from my backups four times; two of them was moving between machines, pretty quickly.

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The problem with using glacier for backups is it's hard to run restore exercises, and without restore exercises, a backup is pretty dangerous
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You can exercise it against regular, non-Glacier S3. Same flow; the only difference is that you skip one attribute on upload and one request/wait step on download.
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