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Moving 100K file to another folder using 1 command


 
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# 1  
Old 12-04-2009
Moving 100K file to another folder using 1 command

Hi,

I need to move 1000s of files from one folder to another.
Actually there are 100K+ files.
Source dir : source1
Target dir : target1

Now if try cp or mv commands I am getting an error message : Argument List too long.

I tried to do it by the time the files are created in the source folder.

Code:
-rw-r--r-- 1 prod usr1 104 Dec 3 08:01 200912_011.txt

For example the above file we can see that files can be seggregated based on the timings - 08:01 > 1000 file
08:02 > 1000 file.
I can select the time from the ls -lrt command using awk '{print $8}'.

But not able to move files writing a command line. This is how I tried, any solution is welcome.

Thanks in advance.

Last edited by zaxxon; 12-04-2009 at 09:39 AM.. Reason: code tags
# 2  
Old 12-04-2009
Use acombination with find like for example
Code:
find . -type f -name "*" -exec cp {} /targetdir \;

or
Code:
find . | cpio -dumpv /targetdir

# 3  
Old 12-04-2009
Moving 100K file to another folder using 1 command

Hello unx100

Good ol' tar is marvellous to copy files from one directory to another:


Code:
cd sourcedir
tar -cf - ./ | ( cd targetdir ; tar -xf - )[/FONT]

When writing backup, tar can send data to stdout when you use a single - (hyphen), instead of setting filename for backup file.

On the other hand, when reading, tar can do the same way.

The parentheses ensure the shell enable to shift working directory before writing to working dir.



Have a good time!

Last edited by zaxxon; 12-04-2009 at 10:25 AM.. Reason: added code tags
# 4  
Old 12-04-2009
Bit heavy handed perhaps but I was at a bit of a loose end...

Code:
#!/usr/bin/perl
use POSIX;
use File::Copy;

$srcdir = '/source1';
$dstdir = '/target1';

opendir(DIR, "$srcdir");
@FILES= readdir(DIR);
foreach $file (@FILES) {
        chomp $file;

        print "current file is: **$file** \n";
        next unless -f $file;
        copy($srcdir . "/" . $file, $dstdir . "/" . $file) or die "File cannot be copied.";
        }

Specifically looking only to copy files...

The one command would be ./script.pl Smilie

Last edited by zaxxon; 12-04-2009 at 10:25 AM.. Reason: Because I had something to add.| zaxxon: added code tags
# 5  
Old 12-04-2009
Hi.

Unless the files are being transferred to a different filesystem, I would recommend mv so that you are not touching the data inside the files, but rather only manipulating directory entries, a far less intensive activity. If different filesystems are involved, mv will arrange a copy, if I recall correctly.

The command
Code:
xargs - build and execute command lines from standard input

was invented to deal with the issue of long argument lists. See man xargs, search the forums, and experiment to see how it will address your problem.

Best wishes ... cheers, drl
# 6  
Old 12-04-2009
You could use rsync which is very versatile and adapted for a huge amount of data.
# 7  
Old 12-05-2009
Thank you all for your suggestions.

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