From: Robert Klemme <shortcutter@...>
Date: 2009-08-27T17:19:47+09:00
Subject: Re: Global Mutex?

2009/8/26 Brian Candler <b.candler@pobox.com>:
> Aryk Grosz wrote:
>> Is there any thing in ruby that acts as a global mutex?
>
> Between multiple processes on the same machine: I'd suggest using
> File#flock on a local file (this probably won't work over NFS) with
> File::LOCK_EX. You can include File::LOCK_NB if you want to test the
> lock but not block if someone else has it.
>
> Between multiple processes on multiple machines: probably run a DRb
> server one one machine which has a local mutex and yields back to the
> caller.

Aryk, just keep in mind that you are also potentially creating a
global bottleneck at the same time... ;-)

Kind regards

robert

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