Solaris

I have never seen a Unix system that supports ALLO other than successfully ignoring it. If you are having trouble creating a 1,000 byte file, or even a 10,000 byte file, the target filesystem must be full or maybe there is a permission problem. Why do you think that you need to use ALLO?

Edit: just saw your last response...

Sorry, you're not going to be able to do that unless you write your own ftpd.

well, if there are multiple 'puts' from X number of clients going to the same server, then i need to make sure that while the files are being transfered, that space does not run out. These will be large files (MB).

So is ALLO not supported by UNIX?
Is there a another way i can do this?

tnks,
Zaff

Well, you can have a lot of disk space. Then you can have tools or/and people who monitor the system for various problems, including free disk space. This is what we do. And it's how everyone else solves the problem.

I would certainly second these comments made by Perderabo. What is usually indicated in these situations is sufficient space to perform the task with some amount of reserve, monitoring, and proper housekeeping.