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Date:      Tue, 3 Apr 2001 10:59:38 -0700
From:      Alfred Perlstein <bright@wintelcom.net>
To:        The Hermit Hacker <scrappy@hub.org>
Cc:        alex <ml-freebsd-smp@phobgate.de>, freebsd-smp@FreeBSD.ORG
Subject:   Re: IBM PC Server 704 ... dual pentium pro ...
Message-ID:  <20010403105938.G813@fw.wintelcom.net>
In-Reply-To: <Pine.BSF.4.33.0104031419090.91376-100000@mobile.hub.org>; from scrappy@hub.org on Tue, Apr 03, 2001 at 02:21:10PM -0300
References:  <20010403094535.D813@fw.wintelcom.net> <Pine.BSF.4.33.0104031419090.91376-100000@mobile.hub.org>

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* The Hermit Hacker <scrappy@hub.org> [010403 10:21] wrote:
> On Tue, 3 Apr 2001, Alfred Perlstein wrote:
> 
> > * The Hermit Hacker <scrappy@hub.org> [010403 06:23] wrote:
> > > On Mon, 2 Apr 2001, Alfred Perlstein wrote:
> > >
> > > > * alex <ml-freebsd-smp@phobgate.de> [010402 12:50] wrote:
> > > > > hi,
> > > > >
> > > > > i just can report that i had the same problem using gigabyte board with
> > > > > dual p3 800mhz and adaptec dual channel controller with 4 scsi disks.
> > > > > this was in december last year and i installed 4.2 release and vinum
> > > > > (raid5, like your config). under heavy disk load (severals processes
> > > > > gziping and ungziping large archives) the box suddenly halted or rebooted.
> > > > >
> > > > > i have another box with dual p3 400mhz and adaptec scsi (without vinum)
> > > > > which runs fine for ~5 months now. even under heavy disk load.
> > > > >
> > > > > maybe it's the comination of smp kernel and vinum...?
> > > >
> > > > It's most likely vinum raid5.
> > >
> > > Hadn't thought of that ... I use vinum quite well on two other boxes, but
> > > one uses strip'ng and the other is purely concat ... using RAID5 was a new
> > > one for me ...
> > >
> > > I'll have to take a peak at CCD and see what she can do :(
> >
> > Vinum striping/concat should be stable.  Are you having issues
> > with it?
> 
> The stripe system I run as my database file system for PostgreSQL, and it
> seems to be rock solid ... my concat file system is used for a mirror
> server, and it seems if I put much load onto her, the kernel panic(s) and
> has to be rebooted (load generally means doing a series of parrellel 'rm
> -rf's to clean up some disk space, so not toooooo concerned) ...

Getting more detailed analysis of these sort of panics back to the
FS/vinum developers should be on your TODO.

-- 
-Alfred Perlstein - [bright@wintelcom.net|alfred@freebsd.org]
Instead of asking why a piece of software is using "1970s technology,"
start asking why software is ignoring 30 years of accumulated wisdom.

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