bash oom problem

[Mikkel]

Patrick O'Callaghan wrote:
> On Sun, 2009-10-04 at 13:54 +0100, psmith wrote:
>> do you have any suggestions what/where i should be looking to get my 
>> required output?
> 
> As Sam says, your initial attempt is trying to produce all 1.5TB at
> once, which is why it blows up, but that's going to happen anyway even
> if you program the same thing in C. IOW it's not an issue with the Shell
> per se, but with the approach to the problem.
> 
> Assuming you actually want all 1.5TB of data (really?) you'd be better
> consuming it as it's produced, perhaps via a pipe. Of course that
> depends on what you're doing with it, which you haven't said.
> 
> poc
> 
One way to do it would be to break it down into nested loops. I am
not sure you could do it in bash - I am not sure how bash handles
loops. You can try something like: (Not tested)

for a in {A..Z}; \
do for b in {A..Z}; \
do for c in {A..Z}; \
do for d in {A..Z}; \
do for e in {A..Z}; \
do for f in {A..Z}; \
echo $a$b$c$d$e$f ; \
done ; done ; done ; done ; done ; done ; done ; done

Mikkel
-- 

  Do not meddle in the affairs of dragons,
for thou art crunchy and taste good with Ketchup!

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