What about Heroku made Erlang clustering difficult? It's had the same DNS cluste... | Hacker News

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nightpool on July 11, 2025 | parent | context | favorite | on: Postgres LISTEN/NOTIFY does not scale

What about Heroku made Erlang clustering difficult? It's had the same DNS clustering feature that Fly has, and they've had it since 2017: https://devcenter.heroku.com/articles/dyno-dns-service-disco....

sorentwo on July 11, 2025 [–]

The problem was with restrictive connections, not DNS based discovery for clustering. It wasn't possible (as far as I'm aware) to connect directly from one dyno to another through tcp/udp.

nightpool on July 11, 2025 | [–]

That is not an issue when using Private Spaces, which have been available since 2015

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