Subject: Re: how to create 21,780 new free software jobs (2,530 in R&D)
From: Tom Lord <>
Date: Tue, 5 Nov 2002 10:24:03 -0800 (PST)

       But every time a client reads a file that can be written by another
       client, the client that reads it has to go back to the server to check
       whether or not the cache is dirty, right?  

No.  The expected case is that the cache is not dirty.

Therefore, clients are given expiring rights to cache a file locally, 
but servers can issue callbacks that cancel those.

More recently, people have been working on features to handle
conflicting rights, as after detached clients with accumulated writes