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POHow do I use Node.js clusters with my simple Express app?
 

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  1. POHow do I use Node.js clusters with my simple Express app?
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    <p>— I built a simple app that pulls in data (50 items) from a Redis DB and throws it up at localhost. I did an ApacheBench (c = 100, n = 50000) and I'm getting a semi-decent 150 requests/sec on a dual-core T2080 @ 1.73GHz (my 6 y.o laptop), but the proc usage is very disappointing as shown: <img src="https://i.stack.imgur.com/zuaIJ.png" alt="enter image description here"></p> <p>Only one core is used, which is as per design in Node, but I think I can nearly double my requests/sec to ~300, maybe even more, if I can use Node.js clusters. I fiddled around quite a bit but I haven't been able to figure out how to put the <a href="http://nodejs.org/docs/latest/api/cluster.html" rel="nofollow noreferrer">code given here</a> for use with my app which is listed below:</p> <pre><code>var express = require( 'express' ), app = express.createServer(), redis = require( 'redis' ).createClient(); app.configure( function() { app.set( 'view options', { layout: false } ); app.set( 'view engine', 'jade' ); app.set( 'views', __dirname + '/views' ); app.use( express.bodyParser() ); } ); function log( what ) { console.log( what ); } app.get( '/', function( req, res ) { redis.lrange( 'items', 0, 50, function( err, items ) { if( err ) { log( err ); } else { res.render( 'index', { items: items } ); } }); }); app.listen( 8080 ); </code></pre> <p>I also want to emphasize that the app is I/O intensive (not CPU-intensive, which would've made something like <a href="http://github.com/xk/node-threads-a-gogo" rel="nofollow noreferrer">threads-a-gogo</a> a better choice than clusters).</p> <p>Would love some help in figuring this out.</p>
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