Making a faster alternative to a slow awk command Post: 302666463

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Which is faster AWK or CUT

If I just wanted to get andred08 from the following ldap dn would I be best to use AWK or CUT? uid=andred08,ou=People,o=example,dc=com It doesn't make a difference if it's just one ldap search I am getting it from but when there's a couple of hundred people in the group that retruns all...

2. UNIX for Advanced & Expert Users

Making things run faster

I am processing some terabytes of information on a computer having 8 processors (each with 4 cores) with a 16GB RAM and 5TB hard drive implemented as a RAID. The processing doesn't seem to be blazingly fast perhaps because of the IO limitation. I am basically running a perl script to read some...

3. UNIX for Dummies Questions & Answers

Which command will be faster? y?

i)wc -c/etc/passwd|awk'{print $1}' ii)ls -al/etc/passwd|awk'{print $5}'

4. UNIX and Linux Applications

Alternative for slow SQL subquery

Hi -- I have the following SQL query in my UNIX shell script -- but the subquery in the second section is very slow. I know there must be a way to do this with a union or something which would be better. Can anyone offer an alternative to this query? Thanks. select count(*) from ...

5. Shell Programming and Scripting

Multi thread awk command for faster performance

Hi, I have a script below for extracting xml from a file. for i in *.txt do echo $i awk '/<.*/ , /.*<\/.*>/' "$i" | tr -d '\n' echo -ne '\n' done . I read about using multi threading to speed up the script. I do not know much about it but read it on this forum. Is it a...

6. Shell Programming and Scripting

Making script run faster

Can someone help me edit the below script to make it run faster? Shell: bash OS: Linux Red Hat The point of the script is to grab entire chunks of information that concerns the service "MEMORY_CHECK". For each chunk, the beginning starts with "service {", and ends with "}". I should...

7. Shell Programming and Scripting

Faster way to use this awk command

awk "/May 23, 2012 /,0" /var/tmp/datafile the above command pulls out information in the datafile. the information it pulls is from the date specified to the end of the file. now, how can i make this faster if the datafile is huge? even if it wasn't huge, i feel there's a better/faster way to...

8. Shell Programming and Scripting

How to make awk command faster?

I have the below command which is referring a large file and it is taking 3 hours to run. Can something be done to make this command faster. awk -F ',' '{OFS=","}{ if ($13 == "9999") print $1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11,$12 }' ${NLAP_TEMP}/hist1.out|sort -T ${NLAP_TEMP} |uniq>...

9. Shell Programming and Scripting

How to make awk command faster for large amount of data?

I have nginx web server logs with all requests that were made and I'm filtering them by date and time. Each line has the following structure: 127.0.0.1 - xyz.com GET 123.ts HTTP/1.1 (200) 0.000 s 3182 CoreMedia/1.0.0.15F79 (iPhone; U; CPU OS 11_4 like Mac OS X; pt_br) These text files are...

LEARN ABOUT DEBIAN

dpkg-awk

DPKG-AWK(1)						      General Commands Manual						       DPKG-AWK(1)

NAME

       dpkg-awk - Utility to read a dpkg style db file

SYNOPSIS

       dpkg-awk [(-f|--file) filename] [(-d|--debug) ##] [(-s|--sort) list] [(-rs|--rec_sep) ??] '<fieldname>:<regex>' ... -- <out_fieldname> ..

DESCRIPTION

       dpkg-awk  Parses  a  dpkg status file (or other similarly formatted file) and outputs the resulting records.  It can use regex on the field
       values to limit the returned records, it can also be told which fields to output, and it can sort the matched fields.

OPTIONS

       -f filename
       --file filename
	      The file to parse.  The default is /var/lib/dpkg/status.

       -d [#]
       --debug [#]
	      Each time this is specified, it increased the debug level.

       -s field(s)
       --sort field(s)
	      A space or comma separated list of fields to sort on.

       -n field(s)
       --numeric field(s)
	      A space or comma separated list of fields that should be interpreted as numeric in value.

       -rs ??
       --rec_sep ??
	      Output this string at the end of each output paragraph.

       -h
       --help Display some help.

       fieldname
	      The fields from the file, that are matched with the regex given.	The fieldnames are case insensitive.

       out_fieldname
	      The fields from the file, that are output for each record.  If the first field listed begins with ^, then the list  of  fields  that
	      follows will NOT be output.

BUGS

       Be  warned  that  the author has only a shallow understanding of the dpkg packaging system, so there are probably tons of bugs in this pro-
       gram.

       This program comes with no warranties.  If running this program causes fire and brimstone to rain down upon the earth, you will be on  your
       own.

       This program accesses the dpkg database directly in places, querying for data that cannot be gotten via dpkg.

AUTHOR

       Adam Heath <doogie@debian.org>

DEBIAN
								 Debian Utilities						       DPKG-AWK(1)