英文:
Does workerpool declared in multiple routes can still maintain its cpu usage without caring about threshold
问题
我希望能够使用workerpool来处理CPU密集型任务的Node.js系统，但在多个路由中有一些关于CPU使用情况让我感到困惑。一个场景如下：
route1.js：
const workerpool = require('workerpool');
const pool = workerpool.pool(__dirname + '/job1.js');
pool.exec.......
route2.js：
const workerpool = require('workerpool');
const pool = workerpool.pool(__dirname + '/job2.js');
pool.exec.......
route3.js：
const workerpool = require('workerpool');
const pool = workerpool.pool(__dirname + '/job3.js');
pool.exec.......
当Node.js使用这三个文件时，它们将创建自己的workerpool，由于worker线程的数量和控制由Node.js内部管理，这是否可能会导致阈值问题？以及如何正确使用workerpool，非常感谢。
英文:
I hope to figure out a node.js system with workerpool to handle cpu intensive tasks, but
there is something confused me about the cpu usage in multiple routes.
A scenario is like this:
route1.js:
const workerpool = require('workerpool');
const pool = workerpool.pool(__dirname + '/job1.js');
pool.exec.......
route2.js:
const workerpool = require('workerpool');
const pool = workerpool.pool(__dirname + '/job2.js');
pool.exec.......
route3.js:
const workerpool = require('workerpool');
const pool = workerpool.pool(__dirname + '/job3.js');
pool.exec.......
When the node.js use these three files, they will create their own workerpool, and
since worker_thread number and its control is via node.js internals, is this possible to
create threshold problem? And how to use workerpool in a correct way, thanks a lot.
答案1
得分: 1
我会只使用一个工作池。工作者可以公开多个函数，因此您的工作者可以毫无问题地公开job1、job2和job3。如果您为每个函数创建一个池，您需要考虑这些池可能会相互影响...
考虑一下，如果您的池子占用了100%的CPU，这意味着如果所有3个池都满了，您最多可以需要300%。
如果您将它们分配为每个池子33%，这意味着您最多可以需要100%，这是不错的，但如果只有job1在某个时间点需要大量资源，它将只能使用可用资源的33%。
通过使用单一池，您可以达到最多100%，而无需超过100%的可用资源。
英文:
What I'd do is only have one pool of worker. Workers can expose multiple functions so your worker could expose job1, job2 and job3 without problem. If you create a pool for each, you'll need to consider that pools may work against each other...
Consider your pools getting 100% of your CPUs, that means you can require up to 300% what you have available if all 3 pools are full.
If you allocated them 33% each, that means you can require up to 100% which is good, but if only job1 is heavily required at one time it will only be able to use 33% of available resources.
By using a single pool, you can reach up to 100% without requiring more than 100% available.
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