nginx_nhpm_client.js

var http = require('http'),
    host = 'aws01',
    creation_delay = 5,
    reporting_delay = 3000,
    clients = [],
    limit = process.argv[2] || 500,
    headers = {
        'Host' : host
    };

var create_http_client = function () {
    var client = http.createClient(80, host);
    client.on('connect', function(){
        clients.push(this);
        if (clients.length < limit) {
            setTimeout(create_http_client, creation_delay);
        }
    });
    var request = client.request('GET', '/feed/subscribe', headers);
    request.end();
};

setInterval(function () {
    console.log('limit: '+limit+'  connected: '+clients.length);
}, reporting_delay);

create_http_client();