Node Js
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Node Js

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Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and ...

Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices.

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Node Js Node Js Presentation Transcript

  • Microsoft, digging node
  • Node, GAINING A LOT OF INTEREST
  • NEW JOBS are exploding
  • SERIOUS adopters
  • Source: https://github.com/joyent/node/wiki/Projects,-Applications,-and-CompaniesUsing-Node
  • AND NPM IS OUTTA CONTROL 2011... ~1800 projects 730 active package authors 26 npm contributors version 1.0 released
  • AND NPM IS OUTTA CONTROL 2012... 72 npm contributors version 1.1.35 released
  • WHY???
  • Source: http://venturebeat.com/2011/08/16/linkedin-mobile-app/
  • LINKEDIN: Node drives the mobile stack “On the server side, our entire mobile software stack is completely built in Node,” KIRAN PRISAD
  • Source: http://www.slideshare.net/phegaro/linkedin-mobile-how-do-we-do-it
  • SCALE “One reason was scale.” KIRAN PRISAD
  • Great for io/bound cals “The second is, if you look at Node, the thing it’s best at doing is talking to other services.” KIRAN PRISAD
  • Great for io/bound cals “The mobile app has to talk to our platform API and database. We’re not doing massive data analytics.” KIRAN PRISAD
  • Huge perf gains “Node showed us huge performance gains compared to what we were using before, which was Ruby on Rails.” KIRAN PRISAD
  • Source: http://www.ebaytechblog.com/2011/11/30/announcing-ql-io//
  • QL.io (EBAY): HTTP gateway a declarative, evented, dataretrieval and aggregation gateway for HTTP APIs SUBBU ALLAMARAJU
  • Source: http://www.slideshare.net/phegaro/linkedin-mobile-how-do-we-do-it
  • What was important • Performance and scale for i/o bound workloads • Operability • Low per-connection memory overhead SUBBU ALLAMARAJU • Dynamic language support
  • Fast interations “Javascript and node.js allowed us to iterate very rapidly.” SUBBU ALLAMARAJU
  • rich ecosystem “Though we were initially concerned about finding the right tools and libraries, the node.js ecosystem proved sufficient for us to build as complex a system as ql.io.” SUBBU ALLAMARAJU
  • SuperB scale “We were able to tune a regular developer-quality Ubuntu workstation to handle more than 120,000 active connections per node.js process, with each connection consuming about 2k memory.”SUBBU ALLAMARAJU
  • Non BLOCKING / simplified programming model “Node’s evented I/O model freed us from worrying about locking and concurrency issues that are common with multithreaded async I/O.” SUBBU ALLAMARAJU
  • Source: http://venturebeat.com/2012/01/24/why-walmart-is-using-node-js/
  • Walmart: mobile strategy In a nutshell, Walmart is able to serve some very sophisticated features to mobile users on the client side using Node. DION ALMAER BEN GALBRAITH
  • Walmart: BETter expErIENCe “It’s saving mobile shoppers a ton of time by customizing content based on device type and browser capabilities.” DION ALMAER BEN GALBRAITH
  • Javascript everywhere progressive enhancement “We’ve been fascinated for a long time by end-to-end JavaScript,” …“a website that would be rich and dynamic… on devices that weren’t too powerful.” DION ALMAER BEN GALBRAITH
  • Javascript everywhere progressive enhancement “Now, on Walmart’s re-engineered Nodepowered mobile app, all the front-end code gets executed on the back end.” DION ALMAER BEN GALBRAITH
  • Scale and flexibility “We rely on services all over the world…We do not control all of those services.” DION ALMAER BEN GALBRAITH
  • Scale and flexibility “Node allows us to front all these services… and scale up very nicely. It’s perfect for what we’re doing in mobile.” DION ALMAER BEN GALBRAITH
  • Turner: Disruptive Thinking “At Turner, Node.js represents a disruption to the mainstream thinking around how you build applications.” DON BROWNING
  • Turner: Disruptive Thinking “We found developers were overengineering their code; writing code for the sake of writing code. We needed to shake things up.” DON BROWNING
  • Turner: Startup Mentality “We’re also starting to behave more like a startup, rather than an enterprise shop. Quick turn around, no ceremony, and finding the Minimum Viable Product.” DON BROWNING
  • Turner: Startup Mentality “We’ve found that being a part of the open-source community really facilitates this mindset.” DON BROWNING
  • The node toolbox
  • What’s in npm? API clients: 118 Boilerplates: 10 Build and deployment: 50 Chat: 1 Class systems: 11 Compression: 16 Content Management Systems: 14 Continuous Integration Tools: 3 Control flow / Async goodies: 78 CSS Engines: 12 Database: 137 DDD, CQRS, EventSourcing: 10 Debugging / console utilities: 75 Desktop application related: 2 File system: 13 Graphics: 39 IL18n and L10n modules: 17 JavaScript threads: 1 Message Queues: 15 Module Loader: 11 Monitoring and Alerting: 3 OpenSSL / Crypto / Hashing: 31 Other: 35 Package Management Systems: 7 Parsers: 135 Payment Gateways: 7 RPC: 19 SMTP: 11 Sound: 2 TCP / IP: 54 Templating: 65 Testing / Spec Frameworks: 75 Web frameworks: 213 Web Sockets & Ajax: 32 Wrappers: 8
  • Contact info gblock@microsoft.com @gblock 再见