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[Linux-cluster] Re: [PATCH 00/14] GFS



Arjan van de Ven wrote:

>On Tue, 2005-08-02 at 16:57 +0200, Jan Engelhardt wrote:
>  
>
>>>* Why use your own journalling layer and not say ... jbd ?
>>>      
>>>
>>Why does reiser use its own journalling layer and not say ... jbd ?
>>    
>>
>
>because reiser got merged before jbd. Next question.
>  
>
That is the wrong reason.  We use our own journaling layer for the
reason that Vivaldi used his own melody.

I don't know anything about GFS, but expecting a filesystem author to
use a journaling layer he does not want to is a bit arrogant.  Now, if
you got into details, and said jbd does X, Y and Z, and GFS does the
same X and Y, and does not do Z as well as jbd, that would be a more
serious comment.  He might want to look at how reiser4 does wandering
logs instead of using jbd..... but I would never claim that for sure
some other author should be expected to use it.....  and something like
changing one's journaling system is not something to do just before a
merge.....

>Now the question for GFS is still a valid one; there might be reasons to
>not use it (which is fair enough) but if there's no real reason then
>using jdb sounds a lot better given it's maturity (and it is used by 2
>filesystems in -mm already).
>
>
>
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