本文介绍了集群时防止多个控制台日志输出的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在将集群模块用于 nodejs 。
这是我的设置方式:
var cluster = require('cluster'); if (cluster.isMaster) { var numCPUs = require('os').cpus().length; for (var i = 0; i < numCPUs; i++) { cluster.fork(); } }else{ console.log("Turkey Test"); }现在,我在PC上分配了6个线程(6个内核)。因此,在调试我的应用程序并从控制台读取数据时,将显示以下内容:
Now, I am forking 6 threads (6 cores) on my PC. So, when debugging my app and reading data from the console, this will appear:
无论有多少个集群,是否都只能输出一次 console.log
Is there anyway to make console.log output only once regardless of how many clusters are running?
推荐答案您可以利用可以与工作人员进行交流的事实,并发送一条消息,告诉每个工作人员是否它应该记录与否。您将其发送为仅一个工作人员(例如第一个工作人员)应该记录:
You could use the fact that you can communicate with the workers, and send a message that tells each worker if it should log or not. You'd send it so that only one worker (The first one for example) should log:
var cluster = require('cluster'); if (cluster.isMaster) { var numCPUs = require('os').cpus().length; for (var i = 0; i < numCPUs; i++) { cluster.fork().send({doLog: i == 0}); } }else{ process.on('message', function(msg) { if(msg.doLog) { console.log('Turkey Test'); } }); }更多推荐
集群时防止多个控制台日志输出
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