From owner-freebsd-hackers Wed Feb 10 14:18:46 1999 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id OAA27086 for freebsd-hackers-outgoing; Wed, 10 Feb 1999 14:18:46 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from cygnus.rush.net (cygnus.rush.net [209.45.245.133]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id OAA27076 for ; Wed, 10 Feb 1999 14:18:42 -0800 (PST) (envelope-from bright@cygnus.rush.net) Received: from localhost (bright@localhost) by cygnus.rush.net (8.8.7/8.8.7) with SMTP id RAA20006; Wed, 10 Feb 1999 17:36:31 -0500 (EST) Date: Wed, 10 Feb 1999 17:36:30 -0500 (EST) From: perlsta To: Matthew Dillon cc: Matthew Jacob , Terry Lambert , freebsd-hackers@FreeBSD.ORG Subject: Re: softupdates In-Reply-To: <199902101949.LAA85603@apollo.backplane.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Wed, 10 Feb 1999, Matthew Dillon wrote: > :I have reported, several times, problems having to do with large > :FFS filesystems, possibly related to softupdates, posibly not, to > :Kirk, Luoqi, etc... Nobody showed any interest in looking at the > :problems - in fact, the email wasn't even answered. > : > :As a consequence, FreeBSD lost out for being considered a candidate > :at NASA/Ames for large mass storage. Shrug...It may or may not be > :true that softupdates, per se, are stable. In my opinion, FFS as > :offered by FreeBSD (and NetBSD) have not shown themselves to be > :adequate to large (>500GB) filesystems. Sad to say, ext2 under > :linux works better. > > Matt, I don't recall seeing anything from you in regards to > large filesystems. Looking in the archives, I see one report > on Jan 27th from you relating to softupdates, but you indicate > that softupdates was not enabled on the volume in question, > so it seems unlikely that it is related to softupdates specifically. > > There have been several reports of dirty-buffer panics which is > of concern, but I haven't been able to reproduce the panic myself > yet. 4.0 has given me some panics on shutdown because it can't sync all buffers, this is usually a result of me using my atapi cdrom both at work and at home. Sometimes as a result of my scsi CD-RW. Sometimes it just shutdown's clean, other times it repeates the last buffer count for a an agonizing 10-20 seconds then shutdowns properly, sometimes it doesn't and just panics after about 30 seconds. I'll break to ddb next time it happensm, right now i have no freebsd access. :/ -Alfred > > -Matt > Matthew Dillon > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message