2010/10/13 roger peppe <rogpeppe@gmail.com>

> 2010/10/13 David Leimbach <leimy2k@gmail.com>:
> > I guess I do not understand how 9p doesn't support pipelining.   All
> > requests are tagged and can be dealt with between client and server in
> > any order right?
>
> two issues (at least):
>
> 1) concurrently sent requests can be reordered (they're serviced in
> separate
> threads on the server) which means that, when reading from a streaming file
> which ignores file offsets, you don't necessarily get data back in the
> order that
> you asked for it.
>
> 2) you can't pipeline requests if the result of one request depends on the
> result of a previous. for instance: walk to file, open it, read it, close
> it.
> if the first operation fails, then subsequent operations will be invalid.
>

I guess I'm trying to imagine how specifically you could pipeline, not the
general ways in which pipelining will fail with 9P.




>
> >
> > On Wednesday, October 13, 2010, Eric Van Hensbergen <ericvh@gmail.com>
> wrote:
> >> For folks interested in more info on the šp portion of Noah's Osprey
> talk,
> >> Anant's thesis is available online: http://proness.kix.in/misc/
> šp-v2.pdf
> >>
> >>       -eric
> >>
> >>
> >
> >
>
>