[OpenAFS] How the file updation process happen in AFS?

Hartmut Reuter reuter@rzg.mpg.de
Mon, 03 Dec 2001 09:05:28 +0100

It' not the server, but the client who starts the update. The client
will send to the server only the dirty chunks, means the chunks which
have been totally or partially rewritten. After the update in the server
the other client in your example who has got a copy of the file will get
a callback-call saying: your data are invalid.


"Srinivas, Mohan" schrieb:
> Hi everybody,
> can any body give answer to this small question?
> How the file updation process happen in AFS?
> Suppose, if the server has a file of size of 4MB, and two clients are
> accessing
> the file (one is reading and the other is writing). The client which is
> writing
> has made some changes to the file in the last 64k part. (which means at the
> end
> of file). Then how the server will update the file, will it update only last
> 64k
> part, or will it update the entire file? because there is no need  to update
> the
> entire file....
> waiting for answer and advance thanks a lot:-):-)
> thanks and regards,
> mohan
> Mohana Satya Srinivas.S.S
> Software Specialist,
> Digital India,
> Digital House,45/14 Tumkur Road,
> Yeshwantpur II stage,
> Bangalore-560012.
> Tel:91-80-3370445, ext:3696.
> fax:91-80-3371498
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Hartmut Reuter                           e-mail reuter@rzg.mpg.de
					   phone +49-89-3299-1328
RZG (Rechenzentrum Garching)               fax   +49-89-3299-1301 
Computing Center of the Max-Planck-Gesellschaft (MPG) and the
Institut fuer Plasmaphysik (IPP)