如何从Django视图启动长时间运行的进程？

I need to run a process that might take hours to complete from a Django view. I don't need to know the state or communicate with it but I need that view to redirect away right after starting the process.

我需要运行一个可能需要几个小时才能从Django视图完成的过程。我不需要知道状态或与之通信，但我需要该视图在启动过程后立即重定向。

I've tried using subprocess.Popen, using it within a new threading.Thread, multiprocessing.Process. However, the parent process keeps hanging until child terminates. The only way that almost gets it done is using a fork. Obviously that isn't good as it leaves a zombie process behind until parent terminates.

我尝试过使用subprocess.Popen，在新的threading.Thread，multiprocessing.Process中使用它。但是，父进程一直挂起，直到子进程终止。几乎完成它的唯一方法是使用fork。显然，这是不好的，因为它留下了一个僵尸进程，直到父终止。

That's what I'm trying to do when using fork:

这就是我在使用fork时要做的事情：

if os.fork() == 0:
    subprocess.Popen(["/usr/bin/python", script_path, "-v"])
else:
    return HttpResponseRedirect(reverse('view_to_redirect'))

So, is there a way to run a completely independent process from a Django view with minimal casualties? Or am I doing something wrong?

那么，有没有办法从Django视图运行完全独立的进程，伤亡最小？或者我做错了什么？

4 个解决方案

#1

I don't know if this will be suitable for your case, nevertheless here is what I do: I use a task queue (via a django model); when the view is called, it enters a new record in the tasks and redirects happily. Tasks in turn are executed by cron on a regular basis independently from django.

我不知道这是否适合你的情况，不过这是我的工作：我使用任务队列（通过django模型）;调用视图时，它会在任务中输入新记录并快乐地重定向。反过来的任务由cron定期执行，独立于django。

Edit: cron calls the relevant (and custom) django command to execute the task.

编辑：cron调用相关（和自定义）django命令来执行任务。

#2

First of all - try to using cron for you task, as early say shanyu.

首先 - 尝试使用cron为你完成任务，如早期说shanyu。

If it doesn't suit you - then try to use CeleryProject, for task Queue for Django. For working it uses RabbitMQ. And here is a little overview for simple using of basing futures

如果它不适合你 - 那么尝试使用CeleryProject，用于Django的任务队列。为了工作，它使用RabbitMQ。这里有一个简单使用基础期货的概述

#3

http://code.google.com/p/django-command-extensions/wiki/JobsScheduling

Is a nice library that that you can use to accomplish this task.

是一个很好的库，可以用来完成这个任务。

#4

Take a look at the code in kronos.py to see one solution to this problem.

看看kronos.py中的代码，看看这个问题的一个解决方案。

http://www.razorvine.net/download/kronos.py

#1