Buildy: 1k HN users placed 250k objects in our HTML5 sandbox

http://blog.playbuildy.com/2012/11/14/hn-postmortem/

by RoboTeddy • 14 years ago

25 4 14 years ago

blog.playbuildy.com

jfaucett• 14 years ago

great follow up. I was on the site and remember being pleasantly surprised by the good performance, so As for the ideas for technical posts mentioned at the end, I'd be most interested in the realtime event publishing with firebase and tornado and rendering and optimization engine stuff :)

alexschleber• 14 years ago

Very interested in the MongoDB and MySql issue, and trade-offs you've perceived with each.

mrjoes• 14 years ago

As far as I understood from previous post, you're using sockjs-tornado and firebase for realtime portion.

Two questions:

1. As sockjs-tornado maintainer I'm very interested in project performance: what is average server load, how memory consumption looks like, etc;

2. Why do you use both Tornado and Firebase and not just one of them?

RoboTeddy• 14 years ago

Thank you for maintaining sockjs-tornado! Performance has been shockingly good.

Setup: sockjs-tornado behind haproxy (on the same ec2 m1.large machine)

Over the 6-hour period the post was at the top of HN, there were about 480 concurrent users. At that time, the python process was using a grand 33 megabytes of memory and the overall system load was at 6%. Go sockjs-tornado :)

In the past couple days we've pushed 12+ gigabytes of real-time data through the server without restarting it. Memory usage has grown to a measly 60mb.

2. We've been using sockjs-tornado to push around ephemeral world update events, and Firebase for more persistent state-sync things like chat and presence. That's a pretty vague answer, I'll write it up better in a blog post!

Please feel free to reach out if you have any more questions -- my address is in my profile

Buildy: 1k HN users placed 250k objects in our HTML5 sandbox

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