Sponsored Content
Top Forums UNIX for Dummies Questions & Answers Large file data handling issue Post 302731553 by Corona688 on Thursday 15th of November 2012 10:09:24 AM
Old 11-15-2012
You can cheat by telling awk that | is the record separator. It won't try to process all 600K as one line.

Note this reads the file twice, so that doublethink isn't necessary to figure out what the last 'line' is.

Code:
awk -v RS="|" 'NR==FNR { LAST=NR; next } FNR!=LAST { printf("%s%s", P, $0); P="|" } END { printf("\n"); }' inputfile inputfile


Last edited by Corona688; 11-15-2012 at 12:11 PM..
 

10 More Discussions You Might Find Interesting

1. HP-UX

Need to split a large data file using a Unix script

Greetings all: I am still new to Unix environment and I need help with the following requirement. I have a large sequential file sorted on a field (say store#) that is being split into several smaller files, one for each store. That means if there are 500 stores, there will be 500 files. This... (1 Reply)
Discussion started by: SAIK
1 Replies

2. Shell Programming and Scripting

Performance issue in UNIX while generating .dat file from large text file

Hello Gurus, We are facing some performance issue in UNIX. If someone had faced such kind of issue in past please provide your suggestions on this . Problem Definition: /Few of load processes of our Finance Application are facing issue in UNIX when they uses a shell script having below... (19 Replies)
Discussion started by: KRAMA
19 Replies

3. Shell Programming and Scripting

Extract data from large file 80+ million records

Hello, I have got one file with more than 120+ million records(35 GB in size). I have to extract some relevant data from file based on some parameter and generate other output file. What will be the besat and fastest way to extract the ne file. sample file format :--... (2 Replies)
Discussion started by: learner16s
2 Replies

4. Shell Programming and Scripting

UNIX File handling -Issue in reading a file

I have been doing automation of daily check activity for a server, i have been using sqls to retrive the data and while loop for reading the data from the file for several activities. BUT i got a show stopper the below one.. where the data is getting store in $temp_file, but not being read by while... (1 Reply)
Discussion started by: KuldeepSinghTCS
1 Replies

5. Shell Programming and Scripting

Severe performance issue while 'grep'ing on large volume of data

Background ------------- The Unix flavor can be any amongst Solaris, AIX, HP-UX and Linux. I have below 2 flat files. File-1 ------ Contains 50,000 rows with 2 fields in each row, separated by pipe. Row structure is like Object_Id|Object_Name, as following: 111|XXX 222|YYY 333|ZZZ ... (6 Replies)
Discussion started by: Souvik
6 Replies

6. Red Hat

Advice regarding filesystems handling large number of files

Hi All, I have a CentOS operating system installed. I work with really huge number of files which are not only huge in number but some of them really huge in size. Minimum number of files could be 1 million to 2 million in one directory itself. Some of the files are even several Gigabytes in... (2 Replies)
Discussion started by: shoaibjameel123
2 Replies

7. Shell Programming and Scripting

UNIX file handling issue

I have a huge file semicolon( ; ) separated records are Pipe(|) delimited. e.g abc;def;ghi|jkl;mno;pqr|123;456;789 I need to replace the 50th field(semicolon separated) of each record with 9006. The 50th field can have no value e.g. ;; Can someone help me with the appropriate command. (3 Replies)
Discussion started by: Gurkamal83
3 Replies

8. UNIX for Dummies Questions & Answers

File handling issue

Hi All, I am running into an issue. I have a very big file. Wants to split it in smaller chunks. This file has multiple header/ trailers. Also, between each header/trailer there are records. Number of records in each header trailer combination can vary. Also, headers can start with... (3 Replies)
Discussion started by: Gurkamal83
3 Replies

9. Shell Programming and Scripting

Output large volume of data to CSV file

I have a program that output the ownership and permission on each directory and file on the server to a csv file. I am getting error message when I run the program. The program is not outputting to the csv file. Error: the file access permissions do not allow the specified action cannot... (2 Replies)
Discussion started by: dellanicholson
2 Replies

10. Shell Programming and Scripting

Large File masking incorrectly happening Ç delimeter issue

The OS version is Red Hat Enterprise Linux Server release 6.10 I have a script to mask some columns with **** in a data file which is delimeted with Ç , I am using awk for the masking , when I try to mask a small file the awk works fine and masks the required column , but when the file is... (6 Replies)
Discussion started by: LinuxUser8092
6 Replies
Padre::Task::File(3pm)					User Contributed Perl Documentation				    Padre::Task::File(3pm)

NAME
Padre::Task::File - File operations in the background SYNOPSIS
# Recursively delete Padre::Task::File->new( remove => 'C:fooaraz', )->schedule; DESCRIPTION
The File::Remove CPAN module is a specialised package for deleting files or recursively deleting directories. As well as providing the basic support for recursive deletion, it adds several other important features such as removing readonly limits on the fly, taking ownership of files if permitted, and moving the current working directory out of the deletion path so that directory cursors won't block the deletion (a particular problem on Windows). The task takes the name of a single file or directory to delete (for now), and proceeds to attempt a recursive deletion of the file or directory via the File::Remove "remove" method. In the future, this module will also support more types of file operations and support the execution of a list of operations. METHODS
new my $task = Padre::Task::File->new( remove => '/foo/bar/baz', ); Creates a new deletion task. Takes a single parameter "remove" which must be an absolute path to the file to delete (as the "current directory" may change between the time the removal task is created and when it is executed). remove The "remove" accessor returns the absolute path of the file or directory the task will try to delete (or tried to delete in the case of completed tasks). SEE ALSO
Padre, Padre::Task, File::Remove COPYRIGHT
Copyright 2008-2012 The Padre development team as listed in Padre.pm. This program is free software; you can redistribute it and/or modify it under the same terms as Perl 5 itself. The full text of the license can be found in the LICENSE file included with this module. perl v5.14.2 2012-06-27 Padre::Task::File(3pm)
All times are GMT -4. The time now is 08:31 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy