October 14, 2011
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Hosting data in the cloud has many advantages, but it usually has the distinct disadvantage of being beholden to a single vendor. Outages do happen, even with S3 (see July 2008). Until now, it was a huge pain–and a significant cost–to establish any kind of mirroring between S3 and any another major cloud storage vendor. This is because you need to compare the file lists at both locations, and then copy whatever files are needed, which means that you need to have a server that is at least partly dedicated to this mirroring task.
However, as I have intimated, mirroring between Amazon S3 and Rackspace Cloud Files (“CF”) is now much easier, and very cheap. Read on for the gory details.
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