scalability
Where does Redis store the data
Redis is a (sort of) in-memory noSQL database; but I found that my copy (running on linux) dumps to /var/lib/redis/dump.rdb
Extreme Sharding: One SQLite Database Per User
The place where this will fail is if you have to do what’s called “shard walking” – which is finding out all the data across a bunch of different users. That particular kind of “query” will have to be done programmatically, asking each of the SQLite databases in turn – and will very likely be … Read more
socket: Too many open files (24) Apache bench lighttpd
ulimit -n 10000 That might not work depending on you system configuration Consult this to configure your system.
Websockets and scalability
1) Single server instance and single client ==> How many websockets will be created and how many connections to websockets? If your client creates one webSocket connection, then that’s what there will be one webSocket connection on the client and one on the server. It’s the client that creates webSocket connections to the server so … Read more
Does Scala scale better than other JVM languages?
Scala is “scalable” in the sense that the language can be improved upon by libraries in a way that makes the extensions look like they are part of the language. That’s why actors looks like part of the language, or why BigInt looks like part of the language. This also applies to most other JVM … Read more
How am I supposed to interpret the results from Apache’s ab benchmarking tool?
Frustrating, isn’t it? I am trying to do the same thing, see how my newly provisioned and configured dedicated server compares to others. What I am ending up doing is comparing my current production server (Dual core 4GB RAM) to the new server (Quad core 8GB RAM). I need to ‘play nice’ with my side … Read more
How many concurrent users can a web app built in Meteor.js handle? [closed]
UPDATE ClassCraft reports one Meteor server handling 6400 concurrent users. Read more in the Scalability section of my Why Meteor article. See also the forum post How Many Simultaneous Users Does the Biggest Current Meteor App Support? Here’s a benchmark not exactly about concurrent users, but rather about setting up subscriptions (arguably a more stressful … Read more