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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.
 

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LEARN ABOUT OSX

zipsplit

zipnote(1)						      General Commands Manual							zipnote(1)

NAME

       zipsplit - split a zipfile into smaller zipfiles

SYNOPSIS

       zipsplit [-t] [-i] [-p] [-s] [-n size] [-r room] [-b path] [-h] [-v] [-L] zipfile

ARGUMENTS

       zipfile	Zipfile to split.

OPTIONS

       -t     Report how many files it will take, but don't make them.

       -i     Make index (zipsplit.idx) and count its size against first zip file.

       -n size
	      Make zip files no larger than "size" (default = 36000).

       -r room
	      Leave room for "room" bytes on the first disk (default = 0).

       -b path
	      Use path for the output zip files.

       -p     Pause between output zip files.

       -s     Do a sequential split even if it takes more zip files.

       -h     Show a short help.

       -v     Show version information.

       -L     Show software license.

DESCRIPTION

       zipsplit reads a zipfile and splits it into smaller zipfiles.

EXAMPLES

       To be filled in.

BUGS

       Does not yet support large (> 2 GB) or split archives.

SEE ALSO

       zip(1), unzip(1)

AUTHOR

       Info-ZIP

								v3.0 of 8 May 2008							zipnote(1)
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