Re: where is the journal kept?

[Pat Double <pat@patdouble.com>]

Stupid, question. I thought that reiser4 had no journal, it is transactional. 
If that's the case, why this option in debug.reiser4 :

Usage: /sbin/debugfs.reiser4 [ options ] FILE
Print options:
   -j, --print-journal           prints journal.


On Monday 15 August 2005 07:58 am, Vladimir V. Saveliev wrote:
> Hello
>
> Payal Rathod wrote:
> > On Mon, Aug 15, 2005 at 04:25:37PM +0400, Vladimir V. Saveliev wrote:
> >>Each journaling filesystem keeps its journal by its own way.
> >>In reiserfs by default journal is kept in statically pre-allocated on
> >> mkfs time 8192 blocks (4096 bytes each) starting from 18-th block.
> >
> > Is it kept in some sort of file?
>
> No. That area of filesystem does not belong to any files stored on that
> filesystem. You can read it from device directly: dd if=/dev/hda1 bs=4096
> count=8192. I am not sure that it can be of any interest, because you will
> see just binary data.
>
> I mean can I see the file contents
>
> > using normal UNIX tools? If yes how do I do it?
>
> You can use
> debugreiserfs -j /dev/hda1 /dev/hda1
> to see journal content. This will decode binary data into human readable
> form.
>
> > With warm regards,
> > -Payal

-- 
Pat Double, pat@patdouble.com
"In the beginning God created the heaven and the earth."