On Wed, Feb 24, 2016 at 05:43:06AM +0000, John Long wrote:
> On Tue, Feb 23, 2016 at 09:48:44PM -0500, Nick Holland wrote:
> > On 02/23/16 14:42, John Long wrote:
> > > Is there any rule of thumb as to how full an ffs filesystem can be without
> > > impacting performance or integrity issues?
> >
> > The people who wrote the code set the limit at 95%...so if you are
> > looking for a "Rule of Thumb"...that's it, provided by the People Who
> > Know Best.
> >
> > Most of us have managed to fill a partition completely with no harm to
> > the system (no promises on the file!). But performance isn't our
> > concern at that point. File integrity isn't an issue until you try to
> > write when there is no space.
> >
> > But really, if you are dancing over the 95% point and are happy about
> > it, you have entered Special Case Land, rules of thumb don't apply and
> > you are responsible for your own situation.
>
> Thanks, this is good info. I need to get move some files around then. These
> little Lemote boxes are such nifty ftp servers I tend to keep piling things
> up on them.
But note the minfree reserve for root only (see tunefs(8)) is
already set at 5% by default. If df(1) reports the fs is 100% full,
actually 5% room is left, for root only.
-Otto
