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One Billion Cells – Another Multiplayer Demo with Clojure
- andersmurphy 1y agoOh, fun. I wasn't expecting this on here so soon. It's very MVP and currently running on a 5$ VPS. Happy to answer any questions.
- spintin 1y ago[dead]
- andersmurphy 1y agoAnd we're back on a 10$ VPS.
- konsalexee 1y agoWhat is the full stack you are using? What parts also require scaling up? DB, bandwidth orrr?
- andersmurphy 1y agoSo the stack is datastar + clojure + sqlite + caddy on a hetzner VPS 2 core 2G. The scaling was preemptive as it was hitting 150% CPU (out of 200%). Needed to power down to rescale. Now it's hovering at around 200% (out of 400%). About 80kb/s and 10 disk iops. Everything goes via a sqlite db.
- daymanstep 1y agoHow are you doing the throttling? I imagine one malicious player might do like 10000 iops to your DB.
- andersmurphy 1y agoSo there's no rate limiting. But because it's sqlite it's a single writer. Everything gets batched as one transaction every 100ms. The operations on a single chunk gets squashed into a single write. Even without the squashing sqlite can handle 10000-20000+ updates/s because of the transaction batching. With the chunk based squashing all edits to a chunk in that 100ms window become one update, so it can scale quite well.
- matsemann 1y agoBut the question wasn't really if you can handle it, but more if someone could control the whole board themselves, I think?
- andersmurphy 1y agoOh, I mean they could try. It's a very big board. Probably possible though if someone is sufficiently motivated.
- matsemann 1y agoI see a snake eating the 0,0 part now at least, heh. Btw, if I add a ' to the string, it's impossible to override by othrs. At least in the UI on Firefox, the snake still ate it.
- ac50hz 1y agoAnders’ blog is a joy to read.
- andersmurphy 1y agoThank you for the kind words. I'm planning on doing a write up on th se billion-foo style games at some point. It's been a fantastic learning experience.
- ac50hz 1y agoI’m looking forward to it.
- Theofrastus 1y agoHas someone already animated Bad Apple on there? Or played Doom, for that matter.
- fambalamboni 1y ago[dead]
- andersmurphy 1y agoI'm just heading off on holiday so if someone does... Please make a gif so I can watch it on my return. There's a bad apple demo on the datastar site. Datastar's[1] streaming hypermedia is what makes this possible, that and good old Clojure and sqlite. - [1] https://github.com/starfederation/datastar https://github.com/starfederation/datastar
- aquariusDue 1y agoDatastar is amazing, I can't wait for the next big release. Once everything clicks it becomes a force multiplier and a joy to work with, something that helped me in that regard is throwing a "data-json-signals" on an element so its easier to keep an eye on things.
- fambalamboni 1y ago[dead]
- freilanzer 1y agoWhat the hell am I even looking at?
- amadeuspagel 1y agoOn mobile, when I click on one of the cells, my keyboard opens.
- andersmurphy 1y agoSo that you can type in the field. It does shift the layout which is annoying. I put this together in a day and wasn't planning on it being on HN. So there's definitely some jank/UX polish. For example the typing experience is nicer on chrome as the field sizes to the text.