Ext3 users - Oct 2002 - To compare Linux journalised filesystem, part II.

Back,

After to get all informations i received, i put them in table as follow:

  see attachment file.

Specialists can they tell me if they agree with my conclusions ?

Thank's for your good job.

Fabien.

-- 

Fabien COMBERNOUS - IT Engineer
eProcess - Parc Club du Millénaire Batiment n° 6
1025 rue Henri Becquerel - 34000 Montpellier FRANCE
http://www.eprocess.fr - +33 (0)4 67 13 84 50

Fabien Combernous writes:
 > Back,
 > 
 > After to get all informations i received, i put them in table as follow:
 > 
 >   see attachment file.
 > 
 > Specialists can they tell me if they agree with my conclusions ?
 > 
 > Thank's for your good job.
 > 
 > Fabien.
 > 
 > -- 
 > 
 > Fabien COMBERNOUS - IT Engineer
 > eProcess - Parc Club du MillИnaire Batiment n╟ 6
 > 1025 rue Henri Becquerel - 34000 Montpellier FRANCE
 > http://www.eprocess.fr - +33 (0)4 67 13 84 50
 >
+------------------+-----+------+-----+----------+------------------------------------------------------------------------+
 > | Features \ fs    | xfs | ext3 | jfs | reiserfs |                        
Comments                                |
 >
+------------------+-----+------+-----+----------+------------------------------------------------------------------------+
 > | mmutable         |  N  |  Y   |  Y  |    Y     | "Y" is not
with same sens. Implementation is not same. Each one permit |
 > | append-only      |     |      |     |          | some elements that
other don't permit and reverse. xfs will have       |
 > |                  |     |      |     |          | implementation in
futur.                                               |
 >
+------------------+-----+------+-----+----------+------------------------------------------------------------------------+
 > | quotas           |  Y  |  Y   |  Y  |    Y     | Again "Y" is
not aqual. ext3 accept quota only on data-journaled       |
 > |                  |     |      |     |          | filesystems, but all
other journaled filesystem don't have data journal|
 > |                  |     |      |     |          | About reiserfs you need
Chris patches.
 >
+------------------+-----+------+-----+----------+------------------------------------------------------------------------+
 > | NFS              |  Y  |  Y   |  Y  |    Y     | nfs works on all of
them. You need at least reiserfs v3.6.
 >
+------------------+-----+------+-----+----------+------------------------------------------------------------------------+
 > | samba            |  Y  |  Y   |  Y  |    Y     | Since Samba is
userspace, the fs shouldn't matter (2.2.4 or 2.2.5)     |
 >
+------------------+-----+------+-----+----------+------------------------------------------------------------------------+
 > | coda             | coda is a file sys him self |            /           
/              /              /             |
 >
+------------------+-----+------+-----+----------+------------------------------------------------------------------------+
 > |data journal      |  N  |  Y   |  N  |    N     | Only ext3 can take care
of data by a data journal. All other journaled |
 > |                  |     |      |     |          | file systems have
"only" a metadata journal.                           |
 >
+------------------+-----+------+-----+----------+------------------------------------------------------------------------+


Reiserfs supports data journalling with yet another set of Chris
patches: ftp://ftp.suse.com/pub/people/mason/patches/data-logging/

Nikita.

On Thu, Oct 24, 2002 at 06:45:30PM +0200, Fabien Combernous
wrote:
> | mmutable         |  N  |  Y   |  Y  |    Y     | "Y" is not
with same sens. Implementation is not same. Each one permit |
> | append-only      |     |      |     |          | some elements that other
don't permit and reverse. xfs will have       |
> |                  |     |      |     |          | implementation in futur.
|
neither jfs or reiserfs support this..
>
+------------------+-----+------+-----+----------+------------------------------------------------------------------------+
> | quotas           |  Y  |  Y   |  Y  |    Y     | Again "Y" is
not aqual. ext3 accept quota only on data-journaled       |
> |                  |     |      |     |          | filesystems, but all
other journaled filesystem don't have data journal|
> |                  |     |      |     |          | About reiserfs you need
Chris patches.
jfs doesn't support quotas.

On Oct 24, 2002  18:45 +0200, Fabien Combernous wrote:
>
+--------+------------------------------------------------------------------+
> | quotas | Again "Y" is not aqual. ext3 accept quota only on
data-journaled |
> |        | filesystems, but all other journaled filesystem don't have
data  |
>
+--------+------------------------------------------------------------------+
Granted that I have never used quotas, so it is possible that I
am incorrect.  However, my understanding is that yes, you do need
data-journaled quota files to ensure that your quota tables don't miss
some operations after a crash.  However, you can separately select
data journaling for files in ext3 (via chattr), even if the rest of
the filesystem is using data=ordered (the default).

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

Hello!

On Thu, Oct 24, 2002 at 06:45:30PM +0200, Fabien Combernous
wrote:
>
+------------------+-----+------+-----+----------+------------------------------------------------------------------------+
> | NFS              |  Y  |  Y   |  Y  |    Y     | nfs works on all of
them. You need at least reiserfs v3.6.
NFS will work with reiserfs v3.5 too, just there is a probability of having 
problems with reusing object ids (and therefore the inode numbers too).
 
> |data journal      |  N  |  Y   |  N  |    N     | Only ext3 can take care
of data by a data journal. All other journaled |
> |                  |     |      |     |          | file systems have
"only" a metadata journal.                           |
No. Chris Mason have set of patches that implement data journaling for reiserfs,
too.

Bye,
    Oleg