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Full Discussion: Splitting a text file into smaller files with awk, how to create a different name for each new file
Top Forums Shell Programming and Scripting Splitting a text file into smaller files with awk, how to create a different name for each new file Post 303027071 by jim mcnamara on Saturday 8th of December 2018 12:10:28 AM
Old 12-08-2018
Note: the csplit syntax is incorrect Ignore the example. See Don Cragun's post below
Have you looked at the csplit command? It works by context (context split), and the split is based on a string or a pattern, not length of records or block sizes. You make it it use fix number of records per output small file as well. Your requirement is for a pattern I think.
Code:
csplit /pattern/ filename

e.g.,
Code:
   csplit /$$$$/ inputfilename

You get to specify the output filenames, so a quick read of the man page is in order, but they are generally something like xx01, xx02 by default.
Change the prefix and if there are literally thousands of possible output files, then declare 4 or 5 digits for the numeration operator.

FWIW sounds like you need a sqlite db or something similar, maintaining thousands of files are a nightmare waiting to happen.
Last edited by jim mcnamara; 12-10-2018 at 02:49 PM.. Reason: Error.
These 2 Users Gave Thanks to jim mcnamara For This Post:
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LEARN ABOUT LINUX

csplit

CSPLIT(1)							   User Commands							 CSPLIT(1)

NAME

       csplit - split a file into sections determined by context lines

SYNOPSIS

       csplit [OPTION]... FILE PATTERN...

DESCRIPTION

       Output pieces of FILE separated by PATTERN(s) to files `xx00', `xx01', ..., and output byte counts of each piece to standard output.

       Mandatory arguments to long options are mandatory for short options too.

       -b, --suffix-format=FORMAT
	      use sprintf FORMAT instead of %02d

       -f, --prefix=PREFIX
	      use PREFIX instead of `xx'

       -k, --keep-files
	      do not remove output files on errors

       -n, --digits=DIGITS
	      use specified number of digits instead of 2

       -s, --quiet, --silent
	      do not print counts of output file sizes

       -z, --elide-empty-files
	      remove empty output files

       --help display this help and exit

       --version
	      output version information and exit

       Read standard input if FILE is -.  Each PATTERN may be:

       INTEGER
	      copy up to but not including specified line number

       /REGEXP/[OFFSET]
	      copy up to but not including a matching line

       %REGEXP%[OFFSET]
	      skip to, but not including a matching line

       {INTEGER}
	      repeat the previous pattern specified number of times

       {*}    repeat the previous pattern as many times as possible

       A line OFFSET is a required `+' or `-' followed by a positive integer.

AUTHOR

       Written by Stuart Kemp and David MacKenzie.

REPORTING BUGS

       Report csplit bugs to bug-coreutils@gnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>
       Report csplit translation bugs to <http://translationproject.org/team/>

COPYRIGHT

       Copyright (C) 2010 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       The  full documentation for csplit is maintained as a Texinfo manual.  If the info and csplit programs are properly installed at your site,
       the command

	      info coreutils 'csplit invocation'

       should give you access to the complete manual.

GNU coreutils 8.5						   February 2011							 CSPLIT(1)
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