What would be the advantage(s) (if any) of using 2 Queues over a Pipe to communicate between processes?
I am planning on using the multiprocessing python module.
views:
249answers:
2
+6
A:
The big win is that queues are process- and thread- safe. Pipes are not: if two different processes try to read from or write to the same end of a pipe, bad things happen. Queues are also at a somewhat higher level of abstraction than pipes, which may or may not be an advantage in your specific case.
John Feminella
2010-02-16 20:07:00
Indeed; the multiprocessing queue is implemented as Pipes protected with Locks.
Jonathan Feinberg
2010-02-16 20:09:43
+1: excellent point.
jldupont
2010-02-16 20:12:40
+1 Jonathan, that's very cool. Learned something new.
John Feminella
2010-02-16 20:34:19
@John Feminella: Jonathan's comment is related to a previous question: http://stackoverflow.com/questions/2275108/python-multi-processing-queue-is-putting-independent-from-getting/
jldupont
2010-02-16 20:40:55
+3
A:
Queues hold the messages and retains them until the next time the queue is active and pushes it through...regardless if the pipe or connection is broken...with a pipe/connection, its goodbye to the message with an error...
Hope this helps, Best regards, Tom.
tommieb75
2010-02-16 20:41:02