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  2. RPG400-L
  3. June 2005

Re: accessing PF from freebsd machine with perl

On Tue, 14 Jun 2005, Scott Klement wrote:




The freebsd box (I hope, I run linux, not freebsd) can mount some share on
the AS/400. By share, I mean a shared directory in the IFS using netserver
stuff, AKA Windows sharing, AKA CIFS, AKA NetBIOS et al. After doing the
mount, the share will look to the freebsd box like local storage.
That's true, you could do that. However, I'd recommend using NFS in preference to SMB/CIFS. It just fits the paradigm better.
This method also doesn't work well when you need real-time response, since it requires a program to poll for a file or record to exist. Program-to-program communications are more efficient if you need real-time response.
There's also a huge risk of timing problems. You need to be very careful that you don't have two things writing to the same file, and that the CGI programs don't ever add to files that have already been processed. So this will take careful planning.
I think Scott is right here. As pointed out, there could be multiple processes all serving web requests and therefore wanting to write to the file. So you need something to handle that. As Scott suggested, a server program (using sockets) is probably the right way to go. Write a daemon that the apache processes connect to when they want to write. Send the data to the daemon and then let the daemon be responsible for writing it to disk. You would probably want to tell the apache processes when the write has completed (or an error message if it doesn't). 

James Rich

It's not the software that's free; it's you.
        - billyskank on Groklaw

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