SUMMARY: Unreal filesize

From: sarama <sarama_at_yandex.ru>
Date: Thu Jun 05 2003 - 23:10:57 EDT
>How can be database filesize more then filesystem?
>What command gives real size in such situation?

It was new for me to know about sparse files
http://www.gnu.org/manual/tar/html_node/tar_121.html

Simple commands to get real information:
du
ls -ls
only GNU-command(cp tar) can deal with such files correctly

But I want to convert sparse file to normal
But it seems to me that I only can rm it

Simple way to create sparse file:
dd if=/dev/zero of=/srv/ftp/1tbfile bs=1k count=1 seek=$((1024*1024*1024))

#ls -l bad
-rw-------   1 notes    notes    1092980282390 Jun  4 17:41 bad
#ls -ls bad
1668864 -rw-------   1 notes    notes    1092980282390 Jun  4 17:41 bad
13840 -rw-------   1 notes    notes    7077888 Jun  5 14:48 good
#du bad good
1668864 bad
13840   good
#du -k bad
834432
#bc -l
1668864*512
854458368
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Received on Thu Jun 5 23:14:12 2003

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