tail packing don't works with tails

tail packing don't works with tails

[Eriberto]

Hello all,

I have a Debian Etch and a partition formated with ReiserFS 3.6. When I
put a file less than 4 KB in this partition, the df command don't show a
variation. Example:

# df /dev/hda7
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/hda7              9477976     32840   9445136   1% /mnt

# dd if=/dev/zero of=/mnt/3k count=1 bs=3k

# df /dev/hda7
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/hda7              9477976     32840   9445136   1% /mnt

Well, the used space didn't modified. Then the new file was stored in
the BTree. But when I make a file with 5 KB, two blocks (8 KB) are
occupied. Example:

# df /dev/hda7
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/hda7              9477976     32840   9445136   1% /mnt

# dd if=/dev/zero of=/mnt/5k count=1 bs=5k

# df /dev/hda7
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/hda7              9477976     32848   9445136   1% /mnt

I think a file with 5 KB must occupy one block only (4 KB) and 3 KB must
be put in the BTree. I would like to know if I am right.

Thanks,

Eriberto - Brazil

Re: tail packing don't works with tails

[Eriberto]

A mistake in:

Eriberto escreveu:
> I think a file with 5 KB must occupy one block only (4 KB) and 3 KB must
> be put in the BTree. I would like to know if I am right.

The correct is:

I think a file with 5 KB must occupy one block only (4 KB) and 1 KB must
be put in the BTree. I would like to know if I am right.

Thanks