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Re: mode data=journal in ext3. Is it safe to use?



On Tue, 2004-06-15 at 20:09 +0200, Petter Larsen wrote:

> Can anybody of you acknowledge or not if mode data=journal in ext3 is
> safe to use in Linux kernel 2.6.x?
> 
> Wee need to have a very consistent and integrity for our filesystem, and
> it would then be desired to journal both data and metadata.
> 
> But if this mode can corrupt the filesystem as both Phil White and
> Nicolas Kowalski has experienced, it may be more advised to use mode
> data=ordered instead.
> 
> Data integrity is much more important for us than speed.

I ran ext3 with data=journal on 2.6.6smp for about a week on a heavily
loaded system (I mean it).  I did not ever experience filesystem
corruption (related to the fs code).  I did, however, hit complete
system lockup once.  It *may* have been unrelated to the fs code.

(If you use quota, it *will* lock.  The author is working on a fix.
Above, I am referring to a lockup with quota off).

Eugene

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