(Illustration by Gaich Muramatsu)
>the data available to the application as it obtains it. If the network goes >away venus would have to simply remember that the file in question is >incomplete and not allow changes to the file until the network was >available again or the file completely retrieved. The "problem" here is that once the file has been opened, venus is not contacted for reads and writes. All coda kernel modules redirect reads and writes to the local file system on which the cache file is stored WITHOUT contacting venus. This makes reads and writes at local disk speed. Any kind of "partial file in cache" would require all kernel modules to be rewritten to communicate with venus to be able to verify if a read or write was OK before doing the read or write. Hoard is the tool of choice here. It makes sure your cache has the files in the cache so an open() does not have to wait for your file to be transferred over the network. It is already in your cache. --Phil -- Phil Nelson NetBSD: http://www.netbsd.org e-mail: phil@cs.wwu.edu Coda: http://www.coda.cs.cmu.edu http://cs.wwu.edu/faculty/nelsonReceived on 2002-10-16 11:41:07