[AFS3-std] advisory "open"/"close" RPC?

[Jeffrey Altman]

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Matthew Andrews wrote:
> Do you suppose that something like this could be used to acquire a key 
> that could be used to access the file untill the corresponding close 
> call? I'm thinking about something that could be used to implement 
> writebehind behavior safely(the cachemanager could continue to flush 
> out changes to the server even after the users tokens expire.)?
>
> -Matt Andrews
RX connections do not have to expire when the token expires.    At the 
present time, the cache manager destroys all existing RX connections 
when the tokens expire.  The cache managers could be smarter and permit 
existing RX connections to remain for use with files that have existing 
dirty buffers and prevent further writing to the files when no token is 
present.

The something that would be obtained from the file server would have to 
be a token of some form.  I don't see how we could use a new token type 
with rxkad that would provide any real benefits to us in the short term.  



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