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It's HighScalability Time:
- @5h15h: Walmart took 40years to get their data warehouse at 400 terabytes. Facebook probably generates that every 4 days
- Should your database failover automatically or wait for the guiding hands of a helpful human? Jeremy Zawodny in Handling Database Failover at Craigslist says Craigslist and Yahoo! handle failovers manually. Knowing when a failure has happened is so error prone it's better to put in a human breaker in the loop. Others think this could be a SLA buster as write requests can't be processed while the decision is being made. Main issue is knowing anything is true in a distributed system is hard.
- Review of a paper about scalable things, MPI, and granularity. If you like to read informed critiques that begin with phrases like "this is simply not true" or "utter garbage" then you might find this post by Sébastien Boisvert to be entertaining.
- The Big Switch: How We Rebuilt Wanelo from Scratch and Lived to Tell About It. Complete rewrites can work...sometimes. In two months they switched to RoR, PostgreSQL, and TDD away from Java/XML, MySQL, and cowboy. Good description of the hand off process. Sounds like a huge shot of redesign helped fix previous mistakes, which is the holy grail of rewrites. It's a story of hope...but don't all stories of temptation begin with hope too?
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