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Strange difference in file size when copying LARGE file..

 
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Old 06-03-2006
Strange difference in file size when copying LARGE file..
Hi, Im trying to take a database backup. one of the files is 26 GB. I am using cp -pr to create a backup copy of the database. after the copying is complete, if i do du -hrs on the folders i saw a difference of 2GB.

The weird fact is that the BACKUP folder was 2 GB more than the original one!

when i did du -hrs * inside each of the 2 folders and compared the output, i found the culprit. it was a file temp.dbf which was 26 GB on the source(original) folder and 28 GB in the BACKUP folder. I tried the copy procedure twice and I am getting the same result.

does anyone have any explanation for this. please let me know. I want to make sure everything is right here in the copy.

PS:- Solaris SPARC 23 BIT.

Thanks
 
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LEARN ABOUT DEBIAN

rdiff-backup-fs

RDIFF-BACKUP-FS(1)					      General Commands Manual						RDIFF-BACKUP-FS(1)

NAME

       rdiff-backup-fs - Filesystem for accessing rdiff-backup archives.

SYNOPSIS

       rdiff-backup-fs <mount_point> <repository> [repositories ...] [-option ...]

DESCRIPTION

       rdiff-backup-fs is a filesystem in userspace that reads rdiff-backup archives and provides convenient access.

OPTIONS

       --debug <0-4>
	      Run rdiff-backup-fs in foreground with given verbosity of debug messages.

       -f, --full
	      Store information about all revisions in memory. CAUTION: this may take a lot of memory if your archive contains many revisions.

       -l, --last
	      Displays	files from the most recent increment as directories, each holding every version of the file. CAUTION: this stores informa-
	      tion about all revisions in memory and therefore may take a lot of memory if archive contains many revisions.

       -c <n>, --caching <n>
	      How many files retrieved from the rdiff-backup archive may be cached by filesystem. By default rdiff-backup-fs will cache up  to	10
	      files. If this switch is set to 0, no caching will be done.

       -r <n>, --revisions <n>
	      How many revisions should be stored in memory for on demand revision retrieval. By default rdiff-backup-fs will store up to 10 revi-
	      sions in memory.

       -d, --directory <path>
	      Set directory for directory with temporary files. By default rdiff-backup-fs uses /tmp.

       -v, --version
	      Print version of rdiff-backup-fs and exit.

SEE ALSO

       rdiff-backup(1)

COPYRIGHT

       rdiff-backup-fs is Copyright (c) 2007-2011 Filip Gruszczyski.

       rdiff-backup-fs is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License  as  published
       by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

       This  program  is  distributed  in  the	hope  that  it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MER-
       CHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with this program.  If not, see <http://www.gnu.org/licenses/>.

AUTHORS

       Filip Gruszczyski <gruszczy@gmail.com>

																RDIFF-BACKUP-FS(1)