Merge pull request #22 from leancloud/cluster

Add server-cluster.js

server-cluster.js

@@ -0,0 +1,17 @@
+var cluster = require('cluster');
+
+// 取决于你的实例的可用 CPU 数量
+var workers = 2;
+
+if (cluster.isMaster) {
+  for (var i = 0; i < workers; i++) {
+    cluster.fork();
+  }
+
+  cluster.on('exit', (worker, code, signal) => {
+    console.log('worker %s died, restarting...', worker.process.pid);
+    cluster.fork();
+  });
+} else {
+  require('./server.js')
+}