I should note that the demonstration is a toy example, you don't actually want/need to store blob data in a paxos-like log directly. For an in-depth look into what it takes to build a strongly-consistent S3-like system (and more) you could check out the paper "Windows Azure Storage: A Highly Available Cloud Storage Service with Strong Consistency". A link to the paper, a talk and slides is on this page: https://blogs.msdn.microsoft.com/windowsazurestorage/2011/11...