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Using Erlang hot code updates

(underjord.io)
268 points lawik | 1 comments | 19 Nov 24 20:29 UTC | HN request time: 0.208s | source
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Thaxll ◴[19 Nov 24 23:00 UTC] No.42188989[source]▶
Hot code update is one of those thing I don't understand, just use a rolling deployment, problem solved. You have a new version of the code without loosing any connection.

It's one of those thing that sound nice on paper but a actually couple your runtime with ci/cd, if you have anything else beside Erlang what do you do? You now need a second solution to deploy code.

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1. rozap ◴[19 Nov 24 23:29 UTC] No.42189195[source]▶
But what if you have long lived stateful connections? And you don't want a deploy to take forever?

Ofc you can say "don't do that" but sometimes it's just the way it is...

But I agree, 99% of the time a rolling update is easier and works fine.