Sponsored Content
Full Discussion: Huge File Comparison
Top Forums Shell Programming and Scripting Huge File Comparison Post 302396157 by naveenn08 on Wednesday 17th of February 2010 11:52:46 PM
Old 02-18-2010
Bug Huge File Comparison

Hi i need to compare two fixed length files and produce the differences if any to a seperate file. I have to capture each and every differneces line by line. Ideally my files should not have any differences but if there are any then it should be captured without any miss. Also my files sizes are very huge say more than 2 GB.

Please help me with a code in either awk or shell script which does this huge file comparison with increase in some performance.

Regards,
Naveen
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

spliting up a huge file

I have a file {filename} which contains 65000 records I need to split into 6 smaller files roughly 11000 records each. Can someone advise me of the Unix command to do so ? Many thanks (2 Replies)
Discussion started by: grinder182533
2 Replies

2. Solaris

compare huge file

Hi, I have files with records of 40,00,000& 39,00,000 and i want to find out the content 1.which is existing in file1 and not in file2. 2.Which is exisitng in file2 and not in file1. The format of the file will be like 404ABCDEFGHIJK|CDEFGHIJK|1234567890|1 If its a smaller one i... (1 Reply)
Discussion started by: salaathi
1 Replies

3. Shell Programming and Scripting

sorting huge file

Hi All I am sorting a huge file -rw-r--r-- 1 rama users 448156978 May 13 18:48 102384.temp $ sort -k 1,40n 102384.temp > 102384.temp1 msgcnt 1468 vxfs: mesg 001: vx_nospace - /dev/vg00/var file system full (1 block extent) sort: A write error occurred while sorting. I thought... (3 Replies)
Discussion started by: dhanamurthy
3 Replies

4. Shell Programming and Scripting

insert a header in a huge data file without using an intermediate file

I have a file with data extracted, and need to insert a header with a constant string, say: H|PayerDataExtract if i use sed, i have to redirect the output to a seperate file like sed ' sed commands' ExtractDataFile.dat > ExtractDataFileWithHeader.dat the same is true for awk and... (10 Replies)
Discussion started by: deepaktanna
10 Replies

5. Shell Programming and Scripting

Help on splitting this huge file

Hi , i have files coming in my system which are very huge in MB and GBs, all these files are in a single line, there is no newline character. I need to get only last 700 bytes of these files, of this i am splitting the files by "split -b 700 filename" but this gives all the splitted... (2 Replies)
Discussion started by: Prateek007
2 Replies

6. Shell Programming and Scripting

Three Difference File Huge Data Comparison Problem.

I got three different file: Part of File 1 ARTPHDFGAA . . Part of File 2 ARTGHHYESA . . Part of File 3 ARTPOLYWEA . . (4 Replies)
Discussion started by: patrick87
4 Replies

7. Shell Programming and Scripting

Optimised way for search & replace a value on one line in a very huge file (File Size is 24 GB).

Hi Experts, I had to edit (a particular value) in header line of a very huge file so for that i wanted to search & replace a particular value on a file which was of 24 GB in Size. I managed to do it but it took long time to complete. Can anyone please tell me how can we do it in a optimised... (7 Replies)
Discussion started by: manishkomar007
7 Replies

8. UNIX for Dummies Questions & Answers

File comparison of huge files

Hi all, I hope you are well. I am very happy to see your contribution. I am eager to become part of it. I have the following question. I have two huge files to compare (almost 3GB each). The files are simulation outputs. The format of the files are as below For clear picture, please see... (9 Replies)
Discussion started by: kaaliakahn
9 Replies

9. UNIX for Dummies Questions & Answers

My file system is 100%, can't find the huge file

Please help. My file system is 100%, I can't seem to find what is taking so much space. The total hard drive space is 150Gig free but I got nothing now. I did to this to find the big file but it's taking so much time. Is there any other way? du -ah / | more find ./ -size +200M... (3 Replies)
Discussion started by: samnyc
3 Replies

10. Solaris

Split huge File System

Gents I have huge NAS File System as /sys with size 10 TB and I want to Split each 1TB in spirit File System to be mounted in the server. How to can I do that without changing anything in the source. Please your support. (1 Reply)
Discussion started by: AbuAliiiiiiiiii
1 Replies
DIFF(1) 						      General Commands Manual							   DIFF(1)

NAME
diff - print differences between two files SYNOPSIS
diff [-c | -e | -C n] [-br]file1 file2 OPTIONS
-C n Produce output that contains n lines of context -b Ignore white space when comparing -c Produce output that contains three lines of context -e Produce an ed-script to convert file1 into file2 -r Apply diff recursively to files and directories of EXAMPLES
diff file1 file2 # Print differences between 2 files diff -C 0 file1 file2 # Same as above diff -C 3 file1 file2 # Output three lines of context with every diff -c file1 file2 # Same diff /etc /dev # Compares recursively the directories /etc and /dev diff passwd /etc # Compares ./passwd to /etc/passwd DESCRIPTION
the same name, when file1 and file2 are both directories" difference encountered" Diff compares two files and generates a list of lines telling how the two files differ. Lines may not be longer than 128 characters. If the two arguments on the command line are both directories, diff recursively steps through all subdirectories comparing files of the same name. If a file name is found only in one directory, a diagnostic message is written to stdout. A file that is of either block special, character special or FIFO special type, cannot be compared to any other file. On the other hand, if there is one directory and one file given on the command line, diff tries to compare the file with the same name as file in the directory directory. SEE ALSO
cdiff(1), cmp(1), comm(1), patch(1). DIFF(1)
All times are GMT -4. The time now is 02:14 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy