[hinkley]

I used to say the same about the Eve Online dev blog, but at some point I stopped reading because they were creating an ad hoc, informally-specified, bug-ridden, slow implementation of half of Erlang.

Concurrency is hard. Blizzard added progressively more and more concurrency over time to rescue orphaned resources assigned to a single shard that was undersubscribed while another shard in the same AZ was seeing flash mobs. But the way they documented it was more of a tea leaves situation. Only enough data to guess what they had done if you were familiar with the space.