Why Tarsnap won’t use DynamoDB

[shared via Google Reader from Daemonic Dispatches]

When I heard last Wednesday that Amazon was launching DynamoDB I was immediately excited. The “hard” server-side work for my Tarsnap online backup service consists mostly of two really big key-value maps, and I’ve spent most of the past two years trying to make those faster and more scalable. Having a key-value datastore service would make my life much simpler, I thought. Unfortunately, upon reading into the details, I’ve decided that DynamoDB — at least in its present form — isn’t something I want to use for Tarsnap.