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awk changes to make it faster

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Top Forums Shell Programming and Scripting awk changes to make it faster
# 1  
Old 05-16-2013
awk changes to make it faster
I have script like below, who is picking number from one file and and searching in another file, and printing output.

Bu is is very slow to be run on huge file.can we modify it with awk

Code:
#! /bin/ksh
while read line1
do
echo "$line1"
a=`echo $line1`
if [ $a -ge 0 ]
then
echo "$num"
cat file1|nawk -v "c=$line1" '$1 ~ c' >> message.log
fi
done < file2

.

file2 has below data
Code:
cat file2
1234
5678
9100
1324

file 1 has string which contain this data in that.
# 2  
Old 05-16-2013
Can you post some of file 1 and example on how you like the output to be.
# 3  
Old 05-16-2013
first four line should be printed, last two should be ignored
Code:
1234,0130020036210801,61400900240,144.135.15.1,50501,8,9550,106A,177200093,144.135.15.212,telstra.internet,mnc001.mcc505.gprs,33,10.237.103.20,0,1,0,0,0,2413,36436,20121002232313,115914,
5678,0124300042019104,61432228629,149.135.133.97,50501,8,6550,2120,80847635,144.135.14.68,telstra.internet,mnc001.mcc505.gprs,33,10.195.135.22,0,1,0,0,0,1962,19782,20121002234954,116855,
9100,0131760091070905,61427989363,149.135.131.65,50501,8,3950,4557,83767434,144.135.14.67,telstra.internet,mnc001.mcc505.gprs,33,100.82.223.99,0,1,0,0,0,235,3324,20121002233018,117271,0,
1324,3524240501157114,61427252411,149.135.133.97,50501,8,A050,0D9E,178201226,144.135.15.212,telstra.internet,mnc001.mcc505.gprs,33,10.239.140.179,0,1,0,0,0,2288,48700,20121002231512,1171
2222,0131760091070905,61427989363,149.135.131.65,50501,8,3950,4557,83767434,144.135.14.67,telstra.internet,mnc001.mcc505.gprs,33,100.82.223.99,0,1,0,0,0,235,3324,20121002233018,117271,0,
2154,3524240501157114,61427252411,149.135.133.97,50501,8,A050,0D9E,178201226,144.135.15.212,telstra.internet,mnc001.mcc505.gprs,33,10.239.140.179,0,1,0,0,0,2288,48700,20121002231512,1171

# 4  
Old 05-16-2013
Try this
Code:
awk -F, 'NR==FNR{a[$0];next} $1 in a' file2 file1

Code:
1234,0130020036210801,61400900240,144.135.15.1,50501,8,9550,106A,177200093,144.135.15.212,telstra.internet,mnc001.mcc505.gprs,33,10.237.103.20,0,1,0,0,0,2413,36436,20121002232313,115914,
5678,0124300042019104,61432228629,149.135.133.97,50501,8,6550,2120,80847635,144.135.14.68,telstra.internet,mnc001.mcc505.gprs,33,10.195.135.22,0,1,0,0,0,1962,19782,20121002234954,116855,
9100,0131760091070905,61427989363,149.135.131.65,50501,8,3950,4557,83767434,144.135.14.67,telstra.internet,mnc001.mcc505.gprs,33,100.82.223.99,0,1,0,0,0,235,3324,20121002233018,117271,0,
1324,3524240501157114,61427252411,149.135.133.97,50501,8,A050,0D9E,178201226,144.135.15.212,telstra.internet,mnc001.mcc505.gprs,33,10.239.140.179,0,1,0,0,0,2288,48700,20121002231512,1171

# 5  
Old 05-16-2013
Jotne assumes the keys are first in file1, separated by comma.
nawk wants ($1 in a).
# 6  
Old 05-16-2013
So you say that it should be?
Code:
awk -F, 'NR==FNR{a[$0];next} ($1 in a)' file2 file1

Gives same result.

I do understand it like this:
Print lines from file1 if its staring with one of the numbers listed in file2
This User Gave Thanks to Jotne For This Post:
mirwasim
# 7  
Old 05-16-2013
Thank you so much, its working great
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