mirror of https://github.com/nodejs/node.git
24 lines
711 B
Markdown
24 lines
711 B
Markdown
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## Cluster
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A single instance of Node runs in a single thread. To take advantage of
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multi-core systems the user will sometimes want to launch a cluster of Node
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processes to handle the load.
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By starting node with the `cluster` argument, Node will detect the number of
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CPUs on the machine and start that many processes. For example suppose we
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had a simple HTTP server in server.js:
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require('http').createServer(function(req, res) {
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res.writeHead(200);
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res.end('hello world\n');
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}).listen(8000);
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If we start it like this
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% node cluster server.js
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Detected 2 cpus
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Worker 2438 online
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Worker 2437 online
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Node will automatically share port 8000 between the multiple instances.
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