比如数据保存在一个全局变量 var message里 这样多个woker和 master都同时读写这个数据会不会出错呢？ app.js
var cluster = require('cluster');
var io = require('socket.io')();
var numCPUs = require('os').cpus().length;
console.log(' numCPUs is ',numCPUs);
var connections=0;
if (cluster.isMaster) {
console.log("master start...");
// Fork workers.
for (var i = 0; i < numCPUs; i++) {
cluster.fork();
}
cluster.on('listening',function(worker,address){
console.log('[Master ]listening: worker ' + worker.process.pid +', Address: '+address.address+":"+address.port);
});
cluster.on('exit', function(worker, code, signal) {
console.log('[Master] worker exit ' + worker.process.pid + ' died');
});
} else if (cluster.isWorker) {
io.on('connection', function(socket) {
console.log('this is process',process.pid);
connections++;
console.log("client ++",connections);
socket.on('disconnect', function() {
connections--;
console.log("client --",connections);
});
socket.on('message',function (msg) {
console.log(msg);
});
});
io.listen(9000);
}
test.html
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>
</title>
<script src="/js/socket.io.js"></script>
</head>
<body>
<script type="text/javascript">
var socket = io.connect('ws://localhost:9000',{'reconnection':true});
socket.on('message', function(msg){
console.log(msg);
});
socket.emit('message',{foo:11,bar:22});
</script>
</body>
</html>
这样启动app.js ，用第一个浏览器刷页面，能看到 控制台显示 client ++ 但是第二个浏览器刷页面，没有反应