At 15:43 -0800 01/21/2004, Sean Ahern wrote:
>Dave Taflin wrote:
>> For grins, have you tried shell commands?
>>
>> cat unsorted.txt | sort > sorted.txt
>
>Unneeded "cat". That should probably be:
>
> sort +0.0 +0.10 +0.20 unsorted.txt > sorted.txt
>
>to sort by columns 0, 10, and 20.
>
>However, I don't think you'd want to pull all 2G of text data into memory
>for the sort. I would very much doubt if UNIX sort does out-of-core
>processing, which is what you really want for this sort (heh) of thing.
Actually it does a "radix" sort using files in the /tmp directory. You are limited by disk space not RAM. It won't kill you by thrashing the VM. Go for the sort command. But make sure you have at least 4 GB of free disk space to sort a 2GB file.
>You'd kill your computer with swapping.
Nope. Read the man page for "sort" there are a LOT of options.
-Scott
--
Dr. Scott Hannahs, Head of User Research Instrumentation
http://sthmac.magnet.fsu.edu
National High Magnetic Field Laboratory, Florida State University
1800 E. Paul Dirac Dr., Tallahassee FL 32310, (850)644-0216/FAX 644-0534
"Claiming that the Macintosh is inferior to Windows because most people use Windows, is like saying that all other restaurants serve food that is inferior to McDonalds."
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