From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 17 Dec 2004 08:50:24 -0700 From: "Ronald G. Minnich" To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu> Subject: Re: [9fans] Acme mailreader In-Reply-To: Message-ID: References: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Topicbox-Message-UUID: 1a158830-eace-11e9-9e20-41e7f4b1d025 On Thu, 16 Dec 2004, Skip Tavakkolian wrote: > but what's under coda, AFS or intermezzo? as martin explained better than I had, intermezzo (Presotto can translate except he has left the building) is 'something between 2 things' and in this case it is an interposition between the top of VFS and ext[2,3]. When the VFS layer does I/O imezzo decides whether to kick the request out to userspace or satisfy it with the ext3 store. the userspace daemon can invalidate entries in the 'cache' (ext3 store). It gets complex and you can see how much easier plan 9 makes this stuff, but that's basically it. ron