Re: dvd+rw-tools update [6.0, DVD-R DL]

[Joerg Schilling <schilling@fokus.fraunhofer.de>]

Matthias Andree <matthias.andree@gmx.de> wrote:

> > > 2. scheduling writes is a complex matter in itself, and there is not a
> > > single answer.  The later you start writing, the more data you have
> > > available if the input rate is low for a while to write a large blob of
> > > data (reducing seeks), the more opportunity you have to rearrange writes
> > > and the lower the total amount of data to write, because updates of
> > > yet-unwritten data do not turn into writes (I/O) but are made in-core.
> > 
> > If you have the buffer cache at the right place and if you are able to
> > cluster to already pending requests (like on Solaris), things work different.
>
> You said Linux would schedule writes after too long a delay, not that it
> were incapable to cluster. What's going on here?

I encourage you to have a look at the Solaris sources if you have problems
to understand clustering.

BTW: it is in the segment driver layer.

Jörg

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