From owner-freebsd-hackers Fri Sep 6 7:15:29 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id DCF1D37B406 for ; Fri, 6 Sep 2002 07:15:23 -0700 (PDT) Received: from acl.lanl.gov (acl.lanl.gov [128.165.147.1]) by mx1.FreeBSD.org (Postfix) with SMTP id 21A5D43E65 for ; Fri, 6 Sep 2002 07:15:23 -0700 (PDT) (envelope-from rminnich@lanl.gov) Received: (qmail 2591106 invoked from network); 6 Sep 2002 08:15:22 -0600 Received: from xed.acl.lanl.gov (128.165.147.191) by acl.lanl.gov with SMTP; 6 Sep 2002 08:15:22 -0600 Received: (qmail 6736 invoked by uid 3499); 6 Sep 2002 08:15:21 -0600 Received: from localhost (sendmail-bs@127.0.0.1) by localhost with SMTP; 6 Sep 2002 08:15:21 -0600 Date: Fri, 6 Sep 2002 08:15:21 -0600 (MDT) From: Ronald G Minnich X-X-Sender: To: Terry Lambert Cc: Seva Tonkonoh , Subject: Re: intermezzo? In-Reply-To: <3D789A9E.A8E3B54@mindspring.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Fri, 6 Sep 2002, Terry Lambert wrote: > Sarnoff has done a similar implementation for FreeBSD, called > MNFS, which had an integrated distributed cache coherency protocol, > and was implemented for FreeBSD circa 1996. goodness, that's me! They're pretty different however. MNFS was for distributed shared memory and was designed to ensure that mmap'ed blocks from the same file remainted consistent across a set of clients. Intermezzo is kind of like "coda done right". The intermezzo name refers to the code that layers between the VFS layer of Linux and ext2/3. OPs from the VFS layer can be redirected to user mode from the intermezzo code. I think intermezzo is doable on freebsd, it just takes time. Also, it is a module. > Maybe they wanted a patent. 8-). Fortunately Peter Braam doesn't worry about patents :-) Peter was here yesterday and tells us that intermezzo can now run over tmpfs. That's cool, I had done something like that two years ago but it was a bit of work and now it just works fine. ron To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message