Date: Sun, 8 Jul 2001 14:05:38 -0500 From: Dave Uhring <duhring@charter.net> To: Dag-Erling Smorgrav <des@ofug.org> Cc: "Jim C. Nasby" <jim@nasby.net>, <freebsd-stable@FreeBSD.ORG>, "Oliver Fromme" <olli@secnetix.de> Subject: Re: JFS Message-ID: <01070814053800.10938@dave> In-Reply-To: <xzp66d3s2a5.fsf@flood.ping.uio.no> References: <200107071638.SAA19610@lurza.secnetix.de> <000d01c1074e$49d31ba0$0300a8c0@uhring.com> <xzp66d3s2a5.fsf@flood.ping.uio.no>
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On Sunday 08 July 2001 13:29, Dag-Erling Smorgrav wrote: > "Dave Uhring" <duhring@charter.net> writes: > > You seem to have missed the critical point of that paper. When the > > system goes completely haywire and either crashes or locks up so > > hard that a manual reset is required, UFS/softupdates requires a > > substantial amount of time to run fsck. > > In FreeBSD-CURRENT, this is done in the background after the file > system is mounted - and the only corruption possible (except in case > of hardware failure, or loss of power to a disk that has write > cacheing enabled) is having blocks marked as allocated when they're > not. I also suspect that fsck is considerably slower than it needs > to be, and that this could be fixed by a careful rewrite of certain > key routines. > > While we're discussing journaling file systems, Sistina Software > (http://www.sistina.com/) have something called GFS (Global File > System) which is a distributed / shared-media file system which can > also function as a local journalled file system. They've already > expressed interest in porting it to FreeBSD, and I believe part of > the work has already been done, but the Sistina employee who was > working on this appears to have quit. The GFS FAQ still says that > "The first GFS port will probably be to FreeBSD." > > Sistina also make a volume manager called LVM (Logical Volume > Manager) which they claim "has become a de-facto standard for storage > management across UNIX implementations", though it's still very much > in BETA and only runs on Linux, so I'm not sure what they mean by > "de-facto standard". > > DES I just took a look at www.sistina.com and a web site which has its font set to Arial is suspect, IMHO. If they have to use Microsoft products to produce a web site...... To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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