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Full Discussion: Split large file based on last digit from a column
Top Forums Shell Programming and Scripting Split large file based on last digit from a column Post 302421753 by alain.kazan on Sunday 16th of May 2010 02:15:10 AM
Old 05-16-2010
Split large file based on last digit from a column
Hello,
What's the best way to split a large into multiple files based on the last digit in the first column.
input file:
f
2738483300000x0y03772748378831x1y13478378358383x2y23743878383802x3y33787828282820x4y43748838383881x5y5

Desired Output:
f0
3738483300000x0y03787828282820x4y4

f1
3772748378831x14y143748838383881x53y51

f2
3743878383802x28y73

f3
3478378358383x56y66


the file is about 60Million records, and im using grep to do the splitting but i guess there must be a faster way. grep ^3.........."$i" ( where value of i is from 0 to 9 )

Appreciate your ideas .

Alain
 

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LEARN ABOUT DEBIAN

nwdiag

NWDIAG(1)						      General Commands Manual							 NWDIAG(1)

NAME

       nwdiag - generate network-diagram image file from spec-text file.

SYNOPSIS

       nwdiag [options] files

DESCRIPTION

       This manual page documents briefly the nwdiag commands.

       nwdiag is generate sequence-diagram image file from spec-text file.

OPTIONS

       These  programs	follow	the  usual  GNU  command  line	syntax, with long options starting with two dashes (`-').  A summary of options is
       included below.	For a complete description, see the Info files.

       -h, --help
	      show this help message and exit.

       --version
	      show program's version number and exit.

       -a, --antialias
	      Pass diagram image to anti-alias filter.

       -c FILE, --config=FILE
	      read configurations from FILE.

       -o FILE
	      write diagram to FILE.

       -f FONT, --font=FONT
	      use FONT to draw diagram.

       -T TYPE
	      Output diagram as TYPE format.

SEE ALSO

       The programs are documented fully by
       http://blockdiag.com/en/nwdiag/

AUTHOR

       nwdiag was written by Takeshi Komiya <i.tkomiya@gmail.com>

       This manual page was written by Kouhei Maeda <mkouhei@palmtb.net>, for the Debian project (and may be used by others).

								   June 11, 2011							 NWDIAG(1)
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