Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Divide large data files into smaller files
Top Forums Shell Programming and Scripting Divide large data files into smaller files Post 302438720 by rubin on Tuesday 20th of July 2010 01:39:48 PM
Old 07-20-2010
Quote:
Originally Posted by ad23
...
I need to split these huge files (~300-400Mb), into smaller files (around 30-40Mb each). Also, I don't want to divide the data (i.e. every record starting with '>' should have its corresponding information in one smaller file).
If I correctly understand your requirement and assuming the above format of the big files,
Code:
awk '/^>[0-9]+$/ && c >=int(n/s) { k++; c=1; close(f) }
     { print > (f=FILENAME"_"k+1); c++ }' s=10 n="$(wc -l < bigfile)" bigfile

For different smaller files' sizes adjust the value of the variable s.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

how to divide single large log file into multiple files.

Can you please help me with writing script for following purpose. I have to divide single large web access log file into multiple log files based on dates inside the log file. For example: if data is logged in the access file for jan-10-08 , jan-11-08 , Jan-12-08 then make small log file... (1 Reply)
Discussion started by: kamleshm
1 Replies

2. UNIX for Dummies Questions & Answers

splitting the large file into smaller files

hi all im new to this forum..excuse me if anythng wrong. I have a file containing 600 MB data in that. when i do parse the data in perl program im getting out of memory error. so iam planning to split the file into smaller files and process one by one. can any one tell me what is the code... (1 Reply)
Discussion started by: vsnreddy
1 Replies

3. UNIX for Dummies Questions & Answers

multiple smaller files from one large file

I have a file with a simple list of ids. 750,000 rows. I have to break it down into multiple 50,000 row files to submit in a batch process.. Is there an easy script I could write to accomplish this task? (2 Replies)
Discussion started by: rtroscianecki
2 Replies

4. Shell Programming and Scripting

Divide data into separate files

frnds: i want to divide data on the behalf of dotted line and redirectd into new files ) ------------------------- M-GET CONFIRMATION ( ------------------------- M-GET CONFIRMATION ( INVOKE IDENTIFIER final data shuld be into 3 files ...... (6 Replies)
Discussion started by: dodasajan
6 Replies

5. Shell Programming and Scripting

Divide data with specific column values into separate files

hello! i need a little help from you :) ... i need to split a file into separate files depending on two conditions using scripting. The file has no delimiters. The conditions are col 17 = "P" and col 81 = "*", this will go to one output file; col 17 = "R" and col 81 = " ". Here is an example. ... (3 Replies)
Discussion started by: chanclitas
3 Replies

6. Shell Programming and Scripting

Finding data in large no. of files

I need to find some data in a large no. of files. The data is in the following format : VALUE A VALUE B VALUE C VALUE D 10 4 65 1 12 4.5 65.5 2 10.75 5.1 ... (2 Replies)
Discussion started by: cooker97
2 Replies

7. Shell Programming and Scripting

Help needed - Split large file into smaller files based on pattern match

Help needed urgently please. I have a large file - a few hundred thousand lines. Sample CP START ACCOUNT 1234556 name 1 CP END ACCOUNT CP START ACCOUNT 2224444 name 1 CP END ACCOUNT CP START ACCOUNT 333344444 name 1 CP END ACCOUNT I need to split this file each time "CP START... (7 Replies)
Discussion started by: frustrated1
7 Replies

8. Shell Programming and Scripting

Divide an EBCDIC files into multiple files based on value at 45-46 bytes

Hi All, I do have an EBCDIC file sent from the z/os , this file has records with different record types in it, the type of record is identified by bytes 45-46 like value 12 has employee record value 14 has salaray record and etc.... we do now want to split the big ebcdic file into multiple... (3 Replies)
Discussion started by: okkadu
3 Replies

9. Shell Programming and Scripting

Sed: Splitting A large File into smaller files based on recursive Regular Expression match

I will simplify the explaination a bit, I need to parse through a 87m file - I have a single text file in the form of : <NAME>house........ SOMETEXT SOMETEXT SOMETEXT . . . . </script> MORETEXT MORETEXT . . . (6 Replies)
Discussion started by: sumguy
6 Replies

10. UNIX for Beginners Questions & Answers

Split large file into smaller files without disturbing the entry chunks

Dears, Need you help with the below file manipulation. I want to split the file into 8 smaller files but without cutting/disturbing the entries (meaning every small file should start with a entry and end with an empty line). It will be helpful if you can provide a one liner command for this... (12 Replies)
Discussion started by: Kamesh G
12 Replies

LEARN ABOUT DEBIAN

speedometer

speedometer(1)							   User Commands						    speedometer(1)

NAME

       speedometer - measure and display the rate of data across a network connection

SYNOPSIS

	  speedometer [options] tap [[-c] tap] ...

DESCRIPTION

       Monitor network traffic or speed/progress of a file transfer. At least one tap option (-f, -rx, -tx) must be entered. Option -c starts a
       new column, otherwise taps are piled vertically.

       Note: before you use the program, satrt generating traffic by transferring files in/out e.g. with scp(1) in the network you're measuring.

OPTIONS

       -b  Use old blocky display instead of smoothed display even when UTF-8 encoding is detected.

       -f filename [size]
	   Display download speed with progress bar. This option must be used if directly following another file tap without an expected size
	   specified.

       -i interval
	   Interval in seconds. Examples: 5 or 0.25". Default is 1.

       -p  Use plain-text display (one tap only).

       -rx iface
	   Display bytes received on network interface.

       -tx iface
	   Display bytes transmitted on network interface.

       -z  Report zero size on files that don't exist instead of waiting for them to be created

       EXAMPLES

       How long it will take for my 38MB transfer to finish?

	   speedometer favorite_episode.rm $(( 38 * 1024 * 1024 ))

       How quickly is another transfer going?

	   speedometer dl/big.avi

       How fast is this LAN?

	   host-a$ cat /dev/zero | nc -l -p 12345
	   host-b$ nc host-a 12345 > /dev/null
	   host-b$ speedometer -rx eth0

       How fast is the upstream on this ADSL line?

	   speedometer -tx ppp0

       How fast can I write data to my filesystem? (with at least 1GB free)

	   dd bs=1000000 count=1000 if=/dev/zero of=bigfile &
	   speedometer bigfile

ENVIRONMENT

       None.

FILES

       None.

SEE ALSO

       htop(1) iotop(1) scp(1) top(1) vmstat(1)

AUTHORS

       Program was written by Ian Ward <ian.ward@excess.org>

       This manual page was written by Jari Aalto <jari.aalto@cante.net>.  Released under license GNU GPL version 2 or (at your option) any later
       version. For more information about license, visit <http://www.gnu.org/copyleft/gpl.html>.

speedometer							    2011-12-10							    speedometer(1)
All times are GMT -4. The time now is 09:31 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy