To compare Linux journalised filesystem, part II.

[Fabien Combernous <fcombernous@eprocess.fr>]

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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

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+------------------+-----+------+-----+----------+------------------------------------------------------------------------+
| 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.                           |
+------------------+-----+------+-----+----------+------------------------------------------------------------------------+