create file with possible combinations of numbers from 3 files 1

[mpramods]

Suppose I have 2 numbers each in 3 files

file1 contains
100
200

file2 contains
333
444

file3 contains
505
606

How can I create a new file which will have all possible combinations of numbers from the 3 files, pasted side by side?

The new file will contain the following:
100-333-505
100-333-606
100-444-505
100-444-606
200-333-505
200-333-606
200-444-505
200-444-606

Currently, I have more than 8000 numbers in each file. So when I create a new file with the possible combinations from these 3 big files, this process needs to be fast. And because 8000 numbers from 3 files would produce billions of combinations, I need to limit the new file to 10 million numbers.

How can I achieve this?

Thanks,
Pramod

 

[sbrews]

not sure how fast this would be - dont have 8000 numbers in 3 files to fully test (and too lazy to create), but... this worked with the following limited files:

file1:
100
200
300

file2:
333
444
555

file3:
505
606
707

COUNT=0
#LIMIT=10000000
LIMIT=3      #just for testing purposes
while read -r NUM1
do
  while read -r NUM2
  do
    while read -r NUM3
    do
      echo "${NUM1}-${NUM2}-${NUM3}"
      ((COUNT = COUNT + 1))
      if (( COUNT >= $LIMIT))
      then
       exit
      fi
    done < file3
  done < file2
done < file1

 

[mpramods]

sbrews,

You rock!! You get a star for the solution.

Your script is working perfect. It took appro 17 minutes to generate the file with 10,000,000 numbers.

Cheers,
Pramod