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by Jemaclus 2181 days ago
The app is called "Hey". It's not the HEY Stack in the same sense as the MEAN stack or the LAMP stack. It's the stack for the app called HEY.
3 comments

They are probably using it as dumb key value storage in a way, and probably found it easier to shard + existing experience.

I'm not sure PostgreSQL sharding ist there yet

Also, uh, it's a pun on haystack... as DHH pointed out somewhere in the thread.
i expect that on their bug tracker, issues have been renamed "needles" so that each issue they work on, is a "needle in the hey stack"