Name: js-handler/node_modules/daemon/examples/cluster.js 
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var cluster = require('cluster');
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var numCPUs = require('os').cpus().length;
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if (cluster.isMaster) {
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    // Fork workers.
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    for (var i = 0; i < numCPUs; ++i) {
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        cluster.fork();
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    }
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    cluster.on('exit', function(worker, code, signal) {
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        console.log('worker ' + worker.process.pid + ' died');
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        cluster.fork();
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    });
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    // daemonize after setting up cluster
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    return require('../')();
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}
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var http = require('http');
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http.createServer(function(req, res) {
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    res.writeHead(200);
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    res.end('process: ' + process.pid);
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    // just a demo to cycle workers
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    // DO NOT DO THIS IN PRODUCTION
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    process.exit();
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}).listen(8000);