[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

Re: ext3 journal file size



On Apr 11, 2003  19:44 +0100, Stephen C. Tweedie wrote:
> On Fri, 2003-04-11 at 15:46, Senthil Kandasamy wrote:
> 
> > In my /var/  directory, I have a use file called ".journal" which
> > takes about 30 Megs of space which is 98% of the file size.
> 
> That looks like the journal file which gets created when you upgrade an
> ext2 filesystem to ext3 while it is still online --- it's normal.  I
> assume /var is a separate filesystem?
> 
> You can't get rid of it --- it's central to the way ext3 works.  (Well,
> you _could_ get rid of it by converting back to ext2!)  But you can hide
> the journal by unmounting the filesystem and running a recent version of
> e2fsck on it, which will convert the .journal file into a "hidden"
> inode.

Note however, that you _can_ make the journal smaller if you don't mind
a small performance hit.  Unmount the filesystem, then:

tune2fs -O ^has_journal /dev/X
e2fsck -f /dev/X
tune2fs -j -J size=4 /dev/X

This will create a hidden 4MB journal.  That is as small as it can be,
unless you have a 1kB block filesystem (see blocksize in dumpe2fs -h /dev/X
output).  If so, you can use "-J size=1" to create a 1MB journal.

Cheers, Andreas
--
Andreas Dilger
http://sourceforge.net/projects/ext2resize/
http://www-mddsp.enel.ucalgary.ca/People/adilger/





[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]