delete and redirection

[Fabien Carmagnac]

Hello,

I have a problem when I remove a file which is a redirection of the std output 
of a process:

I launch a process and redirect output to file:
address@hidden ./myprocess &> mylog.log

Then (after a few days/weeks), I remove the mylog.log file, hoping the system 
will create a new fresh one.
address@hidden rm -f mylog.log

But the system never created again the file.

After a few days, df gives 100% disk used but kdirstat (a gui tool to watch 
size of each folder recursivly), says 20%used.

Then, if I reboot, df says 20%used also.

So my question is : is there a way to rotate/remove/resize logs without:
  - reboot computer
  - stop process flishing in it 

The computer is used as a very critical node in our organisation (quick trading 
24/24).

Thanks,

Regards,
Fabien CARMAGNAC
R&D Manager, Portfolio Manager
TINBERGEN-AM 
35, rue de Chateaudun
75009 Paris - France
Paris :   +33 175 000 322
Mobile :  +33 664 778 699
Fax :     +33 177 725 773
AMF agrément GP-07000030
ISIN: FR0010505115