Re: Current state of filesystem features / improvements

["Aaron J. Grier" <agrier%poofygoof.com@localhost>]

On Thu, Sep 16, 2010 at 08:33:59AM +0200, Niels Dettenbach wrote:
> Which (ffs) features could be recommended to use (i.e. "softdeps") for
> productive environments (and especially within xen pv NetBSD guests)
> to improve performance / faster fsck?
> 
> As i used softdeps last time (2 years ago) i got some os crashes (fs
> errors) within a month.

wapbl (-o log) is suggested to replace softdeps, but I have had lockups
with it on a multiprocessor machine.  (kern/41417)  I have not seen the
same problem on uniprocessor machines so far.

I also hear rumors about background fsck coming over from FreeBSD,
perhaps someone here knows more?

> Is the relative new software RAID under NetBSD reliable and
> performant?

I've been using NetBSD's software RAID implementation (RAIDFrame) since
1999 with great success on multiple platforms.  it has allowed recovery
from hardware failures on numerous occations.

-- 
  Aaron J. Grier | "Not your ordinary poofy goof." | 
agrier%poofygoof.com@localhost