Node.js Server Architecture in practice (IBM, Microsoft, Yahoo!, Walmart, Groupon, SAP, LinkedIn, Rakuten, PayPal, Voxer and GoDaddy)

Node.js is used by IBM, Microsoft, Yahoo!, Walmart, Groupon, SAP, LinkedIn, Rakuten, PayPal, Voxer, and GoDaddy.

Node.js is an open-source, cross-platform runtime environment for developing highly scalable server-side web applications, especially web servers written in JavaScript. It allows you to create applications that use asynchronous event-driven entry-exit system. It is open source application.Node.js applications are written in JavaScript and can be run within the Node.js runtime on OS X, Microsoft Windows, Linux, FreeBSD, NonStop, IBM AIX, IBM System z and IBM i. Its work is hosted and supported by the Node.js Foundation, a collaborative project at Linux Foundation.

Node.js provides an event-driven architecture and a non-blocking I/O API designed to optimize an application’s throughput and scalability for real-time web applications. It uses Google V8 JavaScript engine to execute code, and a large percentage of the basic modules are written in JavaScript. Node.js contains a built-in library to allow applications to act as a stand-alone web server. (source wikipedia)

 

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Node.js is a platform that uses JavaScript as its control language. Writing the HTTP server and application together enables us to easily complete some tasks that are difficult on platforms with separate HTTP and application components.

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Node.js handles network requests in another way than most other web server platforms. Most
HTTP servers maintain a pool of processes or threads that are kept ready to service
incoming requests. Node.js, in contrast to another technonlegies, only has one event queue that processes each incoming request as it happens, and even splits up the processing of parts of an
incoming request into separate events in the main event queue. That means that Node.js doesn’t wait  for a long event to finish before processing other events. For example, if a particular database query is taking a long time, Node.js start processing other events. When the query does finish, an event is placed in the queue so that the controlling routine may use the results.

 

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November 30th, 2015

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