Comment by kentonv

workerd stand-alone is designed to work well at small-medium scale.

If we open sourced Cloudflare's production scheduler, nobody would be able to use it because it is explicitly designed for HUGE, globe-spanning scale. Well, nobody except our direct competitors.

But the goal with workerd is actually that it should be pretty easy to run, about as easy as Node. Stateless workloads should scale trivially (just add more instances and load balance). For Durable Objects (statefull), currently it doesn't scale well at all, but I'm working on changes[0] so that it scales nicely across a cluster. I intentionally chose a design here that is operationally easy to set up. (Basically: just connect all the nodes to NFSv4.)

[0] https://github.com/cloudflare/workerd/pull/6780