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POHandling 10,000 concurrent requests at once with node.js
 

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  1. POHandling 10,000 concurrent requests at once with node.js
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    <p>I'm working on a node.js application that has to provide real-time server push to around 10,000 users. My goal is to minimize the time difference between the first receiver and the last receiver. Right now, I am developing locally on my machine. </p> <p>I use a loop to generate requests and then hold back server response until it hits 10,0000 requests. I want the server to broadcast to all requests at once and measure the difference.</p> <p>request.js</p> <pre><code>var http = require('http') , a = http.getAgent('127.0.0.1', 9202); var util = require('util'); var connections = []; var NUM_CONCURR = 1000; // Max and Min Array.prototype.max = function(){ var max = this[0]; var len = this.length; for(var i=0; i&lt;len;i++) if(this[i]&gt;max) max = this[i]; return max; }; Array.prototype.min = function(){ var min = this[0]; var len = this.length; for(var i=0; i&lt;len; i++) if(this[i]&lt;min) min = this[i]; return min; }; // Number of socket tested a.maxSockets = Infinity; for(var i =0; i&lt;NUM_CONCURR; i++){ http.get({ agent: a, path: '/', port: 9202, host: '127.0.0.1' },function(res){ connections.push(microtime(true)); }); util.log("Connected Clients: "+i); } util.log("Server running at port 9202"); setInterval(function(){ util.log("Total Diff Time = "+(connections.max()-connections.min())); connections =[]; }, 1000*10); // Time function function microtime(get_as_float) { var now = new Date().getTime() / 1000; var s = parseInt(now); return (get_as_float) ? now : (Math.round((now - s) * 1000) / 1000) + ' ' + s; } </code></pre> <p>server.js</p> <pre><code>var http = require('http'), HOST = 'localhost', PORT = '9202'; var connections = [], i; var server = http.createServer(function(req, res){ connections[connections.length] = {req:req, res:res}; console.log('established connections: '+ ++i); }); // Send msg to stored connections function message(){ var i = connections.length, connection; while(i--){ connection = connections[i]; connection.res.writeHead(200); connection.res.write('weeeee'); } }; //Broadcast after 40 sec setTimeout(function(){ message(); }, 1000*40); server.listen(PORT); console.log('listening on 9202'); </code></pre> <p>This for some reason didn't work for me. Is there a better approach? Can anyone share his idea? What's the time difference for you? Thanks.</p>
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