On May 28, 5:48 ¨Βν¬ Άαςα®τ®θοχαςδΆ Όαςα®τ®θοχ®®®ΐηναιμ®γονΎ χςοτεΊ
> On May 28, 2008, at 4:35 PM, Mike Kasick wrote:
>
> > Cute trick.
>
> > However, I wouldn't recommend it's use in any distributed code. > > flocks
> > are intended to serve a purpose other than what's achieved as a side
> > effect here, and although it's generally safe, the behavior is unknown
> > at best if the script file resides in a remote file system like NFS.
>
> > For example, in Linux versions prior to 2.6.12 flocks are local > > only, so
> > this would have the intended effect.  ¨Βοχεφεςιξ Μιξυφεςσιοξσ ²®¶®±²
> > and newer, flocks are emulated by POSIX locks, which should result in
> > only a single instance running across a set of machines attempting to
> > run the same script located in an NFS share.
>
> you can use the same trick even on NFS
>
>  ¨Βερυιςε §ποσιψμογληειξσταμμποσιψμογλ
>
>  ¨ΒΑΤΑ®ποσιψμογλ¨ ΖιμεΊΊΜΟΓΛίΕΖιμεΊΊΜΟΓΛίΞ>
> and this will work for both NFS and local fs.  ¨Βγουςσε ωου§ξεεδ το δεηςαδτο ζμογιζποσιψμογλιξοιξσταμμεδ®®®>
> my lockfile gem is also NFS safe and can be used for this purpose. > actually it can make any program run one instance without modification
>
> rlock lockifle run_this_once.rb

Good to know, thanks Ara.

BTW, I don't see posixlock on the main codeforpeople file listing at
http://rubyforge.org/frs/?group_id=1024

I was able to find 0.0.1 via the RAA, though. Is that the latest
version? I ask because I want to build from source.

Thanks,

Dan