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Slack Engineering·Mar 16, 2021·13 min read66

Migrating Millions of Concurrent Websockets to Envoy

Slack has a global customer base, with millions of simultaneously connected users at peak times. Most of the communication between users involves sending lots of tiny messages to each other. For much of Slack’s history, we’ve used HAProxy as a load balancer for all incoming traffic. Today, we’ll talk about problems we faced with HAProxy,…

System Design
Read original on slack.engineering

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