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What is node.js?
Usages of Node.js - What obstacles is it aiming to provide a ramp for?
What is the correct scenario to use server side javascript? like node.js What kind of problems it solves?
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6 solid reasons to use node.jsRaynos– Raynos2011-12-22 12:24:42 +00:00Commented Dec 22, 2011 at 12:24
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My question was not specific to node.js, but server side script in general. Thanks.Tony– Tony2011-12-22 12:58:48 +00:00Commented Dec 22, 2011 at 12:58
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1 Answer
- Node.js solves the problem of serving many concurrent users from I/O based servers.
- By I/O I mean that little to none computation is done in the request response cycle from the server part.
- By concurrent I meany that thousands of users can keep a connection open with the server.
- Having a persistent connection allows real time communication, the server can push over the opened connection, in a sense this way the server can be thought of as initiating the communication (comet, server push).
All this allows having a large user-base with little server resources and real-time communication (chat etc).
4 Comments
ZolaKt
I don't quite understand your point. Is this something like long polling?
Sergio Tulentsev
@ZolaKt: yes, node.js works well for long polling
ZolaKt
@SergeiTulentsev: is it used just for long polling, or are there any other significant advantages? If it is only for long polling why not use a COMET approach, why resort to javascript?
Sergio Tulentsev
It is used for all sorts of things. Some people serve HTML with it. Use what you're familiar with, not what some guy on the internet tells you to. :-)