“Evented I/O for V8 Javascript” – http://nodejs.org Application engine for “scalable network applications” Really freaking fast: One process, zero* threads (Almost) no blocking High concurrency with low overhead No thread swapping or context switching Applications must be designed from the ground up to not block on I/O, CPU-intensive work, etc.
A full-stack web framework (a la Ruby on Rails) But! you can get there: ExpressJS: (http://expressjs.com/ ) (Web framework with MongoDB support built in - similar to Sinatra) http://github.com/senchalabs/connect (Rack-like middleware for Node and Express) haml.js: http://github.com/visionmedia/haml.js (Pure js implementation of HAML) Great at sending large static files concurrently. (use nginx.) Buffer implementation in recent versions improves this dramatically: http://nodejs.org/jsconf2010.pdf Completely non-blocking. CPU-intensive stuff will still block you (do it in a worker process). Some system calls (executed in a thread pool)
Great together! Both: speak Javascript understand JSON documents are freaking fast. So, what should you build? You can build: Standard n-tier web applications Great way to learn mongoDB and Node Go build a blog engine! (Everyone does.) Lots of libraries to help you get started: ExpressJS, Connect, etc. You should build: Applications requiring high throughput and concurrency Applications with real-time needs Applications with long-polling connections Real-time multiuser chat Web or log analytics (e.g. Hummingbird)
如果你觉得很完美那继续阅读：http://www.slideshare.net/ggoodale/getting-started-with-mongodb-and-nodejs
