Here's a request, how did you migrate all that data. Are you going to be open-sourcing any of the tools that you built up? We'd be interesting in hearing about that process. A lot of folks using B2 right now are trying to do this exact thing (or making copies if not actual migrations). Cheers! ;-)
One of the ways tech companies wrong is by putting the tech first and the users second. I think Dropbox's early competitive advantage was putting the user experience first. Everybody else had weird, complex systems; you folks just had a magic folder that was always correct. User focus like that is easier to pull off when it's just a few people. But once you break the customer problem up into enough pieces that hundreds of engineers can get involved, sometimes the tail starts wagging the dog and technically-oriented decisions start harming the user experience.
How did you folks avoid that?
Will most likely start with the following: 1. Overall architecture and internals. 2. Verification and projection mechanisms, how we keep data safe. 3. How we manage a large amount of hardware (hundreds of thousands of disks) with a small team, how we automatically deal with alerts etc. 4. A deep-dive into the Diskotech architecture and how we changed our storage layer to support SMR disks.
Hopefully these will be of a sufficient level of detail. We certainly won't be getting into any details on cost but we're pretty open from a technical perspective.
(Lemme just take a moment to say how great Backblaze's tech blog posts are btw.)