Move files from one directory to another in chunks Post: 303002302

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Top Forums Shell Programming and Scripting Move files from one directory to another in chunks Post 303002302 by hburnswell on Monday 21st of August 2017 11:46:49 PM

08-22-2017

Registered User

Move files from one directory to another in chunks

All,

I have an application that is not working properly and the company is 'in the process' of fixing it. In the meantime, I want to write a bash script work-around. However, what I thought was going to be simple is seemingly not.

Need:

- Move files from one directory to another in chunks.

If I move all the files at once the system resources are heavily consumed and the application suffers. The source directory ($dir1) will contain any number of files (100's or 1000's) at any given time. So, I'd like to do something like:

Code:

if [ "$(ls -A $dir1) ]; then

	find $dir1 -maxdepth 1 -type f > output.txt

	<loop through output.txt moving x amount of files at a time until directory empty>

	mv `head -100 output.txt` $dir2

else

	echo "no files to move.."

fi

I know I can accomplish what I need with a brute force creation of many files to read from but there must be a more sophisticated way to do it.

Is there way to drop the list of files into an array and do something like:

Code:

mv $files[1-100] $dir2
mv $files[101-200] $dir2

I need to find a usable number of files to move at a time (could be 100, 5000, 10000) while not knowing how many files could be in $dir1 at any given time.

Any guidance is greatly appreciated.

TIA,

Herb

Last edited by rbatte1; 08-22-2017 at 06:26 AM.. Reason: Added CODE tags

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nfanon

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NAME

       nfanon - netflow anonymisation

SYNOPSIS

       nfanon [options]

DESCRIPTION

       nfanon  is used to anonymise all IP addresses ( src, dst, next hop, router IP etc. ) in the netflow records using the CryptoPAn (Cryptogra-
       phy-based  Prefix-preserving Anonymization) module. The key -K is used to initialize the Rijndael cipher.  The key is either a 32 character
       string, or a 64 hex digit string starting with 0x.

	  See http://www.cc.gatech.edu/computing/Telecomm/cryptopan/ for more information about CryptoPAn.

       nfanon has several modes of operation.

       o  nfanon reads a sequence of input files, specified by -r, -R and -M and anonymises the flows in the given files. The input file arguments
       have the same syntax and meaning as nfdump(1).

       o nfanon reads a sequence of input files, specified by -r, -R and -M.  All anonymised flows are written to a single file specified by -w.

       o nfanon works as filter and reads flows from stding and writes the anonymised flows to stdout.

OPTIONS

       -r inputfile
	  Read input data from inputfile. Default is read from stdin.

       -R expr
	  Read input from a sequence of files in the same directory. expr may be one of:
	   /any/dir	     Read recursively all files in directory dir.
	   /dir/file	     Read all files beginning with file.
	   /dir/file1:file2  Read all files from file1 to file2.

	   Note: files are read in alphabetical sequence.

       -M expr
	  Read input from multiple directories. expr looks like: /any/path/to/dir1:dir2:dir3  etc.  and  will  be  expanded  to  the  directories:
	  /any/path/to/dir1, /any/path/to/dir2 and /any/path/to/dir3 Any number of colon separated directories may be given. The files to read are
	  specified by -r or -R and are expected to exist in all the given directories.  The options -r and -R must not contain any directory part
	  when used in conjunction with -M.

       -w outputfile
	  If specified writes anonymised netflow records to outputfile.

       -K key
	  The key is used to initialize the Rijndael cipher. key is either a 32 character string, or a 64 hex digit string starting with 0x.

RETURN VALUE

       Returns
	   0   No error.
	   255 Initialization failed.
	   250 Internal error.

NOTES

       None.

SEE ALSO

       nfdump(1)

BUGS

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