pymongo + gevent:给我扔一个香蕉，然后给我monkey_patch? [英] pymongo + gevent: throw me a banana and just monkey_patch?

问题描述

在这里，需要比我现在在pymongo上需要更多领域专业知识的Quickie:

Quickie here that needs more domain expertise on pymongo than I have right now:

是否用python编写的pymongo驱动程序的正确"部分为我调用gevent monkey_patch()并成功更改了gevent异步" greenlets中pymongo在r/w上的阻塞行为?

Are the "right" parts of the pymongo driver written in python for me to call gevent monkey_patch() and successfully alter pymongo's blocking behavior on r/w within gevent "asynchronous" greenlets?

如果这需要在gevent和pymongo上做更多的工作-但是这是可行的-只要我能对irc有所了解，我将非常愿意花时间.

If this will require a little more leg work on gevent and pymongo -- but it is feasible -- I would be more than willing to put in the time as long as i can get a little guidance over irc.

谢谢！

注意:在小规模的mongo上写并不是一个大问题，因为我们只是在取消阻塞之前对写请求"进行排队.但是与fiorix谈论他扭曲的异步mongo驱动程序(https://github.com/fiorix/mongo-async-python-driver)，即使mongo的快速写入(请求)也可能在大规模异步应用程序中引起问题. (当然，非阻塞读取可能从一开始就引起问题！)

Note: At small scale mongo writes are not a big problem because we are just queuing a write "request" before unblocking. BUT talking to fiorix about his twisted async mongo driver (https://github.com/fiorix/mongo-async-python-driver), even mongo's quick write (requests) can cause problems in asyncronous applications at scale. (And of course, non-blocking reads could cause problems from the start!)

推荐答案

我在Gevent中使用了PyMongo，以下是需要注意的几件事:

I have used PyMongo with Gevent and here are a few things you need to watch out for:

1. 仅实例化一个pymongo.Connection对象，最好将其实例化为全局或模块级变量.这很重要，因为Connection自身内部有一个池！
2. 猴子打补丁所有东西，或者至少打补丁套接字和线程.由于在Connection中使用了线程局部变量，仅修补套接字是不够的.
3. 记住要调用end_request以将连接返回到池中.

1. Instantiate only one pymongo.Connection object, preferrably as a global or module-level variable. This is important because Connection has within itself a pool!
2. Monkey patch everything, or at least BOTH socket and threading. Due to the use of thread locals in Connection, patching socket alone is not enough.
3. Remember to call end_request to return the connection to the pool.

您的问题的答案是继续，PyMongo与Gevent配合得很好.

The answer to your question is go ahead, PyMongo works just fine with Gevent.

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