From owner-freebsd-hackers Tue Dec 15 09:54:10 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id JAA27478 for freebsd-hackers-outgoing; Tue, 15 Dec 1998 09:54:10 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from wall.polstra.com (rtrwan160.accessone.com [206.213.115.74]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id JAA27468 for ; Tue, 15 Dec 1998 09:54:02 -0800 (PST) (envelope-from jdp@polstra.com) Received: from vashon.polstra.com (vashon.polstra.com [206.213.73.13]) by wall.polstra.com (8.9.1/8.9.1) with ESMTP id JAA05364; Tue, 15 Dec 1998 09:53:51 -0800 (PST) (envelope-from jdp@polstra.com) From: John Polstra Received: (from jdp@localhost) by vashon.polstra.com (8.9.1/8.9.1) id JAA16545; Tue, 15 Dec 1998 09:53:50 -0800 (PST) (envelope-from jdp@polstra.com) Date: Tue, 15 Dec 1998 09:53:50 -0800 (PST) Message-Id: <199812151753.JAA16545@vashon.polstra.com> To: eivind@yes.no Subject: Re: idea/help w. mirroring Newsgroups: polstra.freebsd.hackers In-Reply-To: <19981214232905.R5444@follo.net> References: Organization: Polstra & Co., Seattle, WA Cc: hackers@FreeBSD.ORG Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG In article <19981214232905.R5444@follo.net>, Eivind Eklund wrote: > On Mon, Dec 14, 1998 at 04:39:42PM -0500, Alfred Perlstein wrote: > > > > Has anyone written something that could be used to intercept all calls to > > write out file modification and give the modifications to a userland > > application? > > > > I'm interested in the most efficient method of doing filesystem mirroring, > > passing that info into a userland app using multicast would be ideal. > > > > The userland app may see which blocks of which file have been modified and > > distribute deltas across the network. Something like that would also be useful to reduce the load on primary CVSup server hosts such as freefall. > Stacking layer. Ha ha ha, how about something that actually works, as opposed to "sounds good in the McKusick book"? As far as I can tell, there's not a single stackable filesystem in FreeBSD that works well enough to use in practice. John -- John Polstra jdp@polstra.com John D. Polstra & Co., Inc. Seattle, Washington USA "Nobody ever went broke underestimating the taste of the American public." -- H. L. Mencken To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message