[OpenAFS] what does "fs prefetch" do?

[Felix Frank]

Hello,

strange, I can't seem to find it in 1.5.56 src/venus/fs.c

There is an fs prefetch in Hartmut's OpenAFS+OSD. It stages the 
restoration of a file that is archieved (e.g., on tape) and not available 
from an RxOSD server anymore. Without prefetching such files, the client 
has to wait for the file to be restored upon the first access.

Regards
Felix

On Sun, 4 Jan 2009, Jason Edgecombe wrote:

> I noticed that there is a "fs prefetch" starting around 1.5.40. What does it 
> do? How would one use it? Why would one use it?
>
> Thanks,
> Jason
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