From: Francis Cianfrocca <garbagecat10@...>
Date: 2007-10-10T21:51:15+09:00
Subject: Re: Inter-Process Messaging

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On 10/10/07, Daniel DeLorme <dan-ml@dan42.com> wrote:
>
> What are the possibilities in ruby for passing information from one
> process to another? Specifically, I'm thinking of messaging between a
> parent process and its forked child.
>
> Right now I can think of some messaging primitives:
> - TCPServer/TCPSocket
> - UNIXServer/UNIXSocket (unstable?)
> - IO.pipe (doesn't need port#)
> - Process.kill (impossible to send data)
>
> And some messaging libraries:
> - DRb (standard)
> - eventmachine (efficient?)
>
> ...what else? And, if anyone has the experience, what are the
> advantages/disadvantages of each in terms of speed, reliability, system
> resources?



Intramachine messaging with any of the technologies you mentioned will be
pretty lightweight. The usual thing one tries to do with related processes
is to open a pipe or a socketpair in the parent. Then after the fork, just
send data over the sockets.

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