barrier and commit options?
Nicolas KOWALSKI
nicolas.kowalski at gmail.com
Fri Jan 30 15:30:21 UTC 2009
On Fri, Jan 30, 2009 at 10:22:46AM -0500, Eric Sandeen wrote:
> Christian Kujau wrote:
> > On Fri, 30 Jan 2009, Nicolas KOWALSKI wrote:
> >> I know I may loose the last 30 seconds of "work" (it's just a home
> >> server), but is the filesystem at risk (corruption, whatever, ...) with
> >> these mount options ?
> >
> > No, why would it? If certain mount options would make a filesystem prone
> > to corruption I'd consider this a bug.
>
> Well, that's not exactly true. Turning off barriers, depending on your
> storage, could lead to corruption in some cases. Mounting with
> data=writeback can expose stale data, which could even be a security issue.
>
> But as long as you make these decisions consciously, they may fit your
> needs.
>
> > So apart from losing a few more
> > seconds of work in case of an error, the fs should be fine.
>
> This part is correct, barriers on and longer commit time should not
> affect filesystem consistency / integrity.
Ok, I'm more relaxed about my data then. :)
Thanks for your reply,
--
Nicolas
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