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Full Discussion: Honey, I broke awk! (duplicate line removal in 30M line 3.7GB csv file)
Top Forums Shell Programming and Scripting Honey, I broke awk! (duplicate line removal in 30M line 3.7GB csv file) Post 302894691 by Michael Stora on Wednesday 26th of March 2014 06:20:47 PM
Old 03-26-2014
Thanks for all the suggestions. My workaround so far has been to skip the duplicate line removal and add it to the querries I run against the database instead. This has allowed me to procede with my analysis.

I will go back and fix the database at some point however when the current deadline passes.

I will have to check closely which fields alone can indicate a duplicate record. Since the addition of a column (and therefore the length of $0) is what broke it, taking something out may help. I'm not sure as I am already taking the important columns from two types of database files and the "housekeeping columns" are not included.

Is there a way to do a checksum or fairly robust hash in awk? That might be the best way to shorten the array names which appears to what is killing awk.

Mike

PS. I would love to be using real Linux instead of Cygwin (as I do at home). Unfortunately that is a boundary condition.
Last edited by Michael Stora; 03-26-2014 at 08:03 PM..
 

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LEARN ABOUT DEBIAN

rancid-cvs

rancid-cvs(1)						      General Commands Manual						     rancid-cvs(1)

NAME

       rancid-cvs - initialize CVS or Subversion and rancid group files and directories

SYNOPSIS

       rancid-cvs [-V] [group [group ...]]

DESCRIPTION

       rancid-cvs  creates the directories and router.db(5) for each rancid group and handles the revision control system (CVS or Subversion) set-
       up.  It must be run after installation and whenever a rancid group is added.

       rancid-cvs reads rancid.conf(5) to configure itself, then proceeds with the initialization.  First of the CVS or Subversion repository,	if
       necessary,  and	then for each of the rancid groups listed on the command-line or those in the variable LIST_OF_GROUPS from rancid.conf(5),
       if the argument is omitted.

       Running rancid-cvs for groups which already exist will not cause problems.  If the group's directory already exists, the  import  into  the
       revision control system will be skipped, and if it's router.db(5) already exists, it will not be altered.

       The command-line options are as follows:

       -V     Prints package name and version strings.

       The  best  method  for  adding  groups  is  add	the group name to LIST_OF_GROUPS in rancid.conf(5), then run rancid-cvs. Do not create the
       directories manually, allow rancid-cvs to do it.

SEE ALSO

       cvs(1), rancid.conf(5), router.db(5), svn(1)

								  5 October 2006						     rancid-cvs(1)
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