Trello的技术栈（The Trello Tech Stack ）

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Trello 服务器的原型版本实际上只是一个函数库, 它在单个 Node.js 进程的内存中对模型的数组进行操作，而客户端只是通过一个非常轻巧的包装在 WebSocket 调用这些函数。Trello 的服务器端是在node. js 中建立的。 Trello 服务器几乎不提供 HTML 服务。 Trello 客户端应用程序包括单个缩小和压缩的 JS 文件、1个 CSS 文件和内置图像，总共不到250k。

Source

此清单根据以下文章列出，该文章发布于2012年，距离今日已数年之久，期间新技术层出不穷，情况或已发生变化。故建议作为学习参考。
（This list is listed in the following article)：
Title：The Trello Tech Stack
Authors：By Brett Kiefer

The Client

Backbone.js (client-side MVC)
HTML5 pushState
Mustache (templating language)

The Server

node.js
HAProxy
Redis
MongoDB

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运行时

Node.js The server side of Trello is built in Node.js.

Node.js JavaScript 运行时。「Node.js JavaScript runtime.」

JavaScript

Trello的技术栈（The Trello Tech Stack ）

Node.js The server side of Trello is built in Node.js.

MongoDB MongoDB fills trello\'s more traditional database needs. In MongoDB, Trello give up relational DB features (e.g. arbitrary joins) for very fast writes, generally faster reads, and better denormalization support.

Redis Trello uses Redis for ephemeral data that needs to be shared between server processes but not persisted to disk.

Mustache templating language

HAProxy use HAProxy to load balance between webservers.

Express basic web tech like routes and cookies

Backbone.js client-side MVC

CoffeeScript Program language

Socket.IO We use a modified version of the Socket.io client and server libraries that allows us to keep many thousands of open WebSockets on each of our servers at very little cost in terms of CPU or memory usage.

Async used to keep their code under control.

MongoDB Node.JS Driver MongoDB Native NodeJS Driver

Mongoose a real DB and Schema

Connect basic web tech like routes and cookies

Cluster multiple server processes with zero-downtime restarts

Node Redis inter-process pubsub and structured data sharing via Redis