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Full Discussion: Alternative for wc -l
Top Forums Shell Programming and Scripting Alternative for wc -l Post 302462832 by rajesh_2383 on Friday 15th of October 2010 06:54:43 AM
Old 10-15-2010
Data Alternative for wc -l

Hi techies ..

This is my first posting hr ..

Am facing a serious performance problem in counting the number of lines in the file. The input files i get will be in some 10 to 15 Gb of size or even sometimes more ..and I will load it to db

I have used wc -l to confirm whether the loader has loaded entire data ...the couting operaion alone consumes more than 45 to 50 mins ...could someone suggest me any other way to get the count of lines in files ..Smilie

pls note I cant use sed due to the coding standards followed here ..so pls excuse ..

Any other swifting workaround would be really helpfull ..and appreciatedSmilie
 

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GREP(1) 						      General Commands Manual							   GREP(1)

NAME
grep - search a file for lines containing a given pattern SYNOPSIS
grep [-elnsv] pattern [file] ... OPTIONS
-e -e pattern is the same as pattern -c Print a count of lines matched -i Ignore case -l Print file names, no lines -n Print line numbers -s Status only, no printed output -v Select lines that do not match EXAMPLES
grep mouse file # Find lines in file containing mouse grep [0-9] file # Print lines containing a digit DESCRIPTION
Grep searches one or more files (by default, stdin) and selects out all the lines that match the pattern. All the regular expressions accepted by ed and mined are allowed. In addition, + can be used instead of * to mean 1 or more occurrences, ? can be used to mean 0 or 1 occurrences, and | can be used between two regular expressions to mean either one of them. Parentheses can be used for grouping. If a match is found, exit status 0 is returned. If no match is found, exit status 1 is returned. If an error is detected, exit status 2 is returned. SEE ALSO
cgrep(1), fgrep(1), sed(1), awk(9). GREP(1)
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