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

[Bill Davidsen <davidsen@tmr.com>]

Matthias Andree wrote:

> Joerg Schilling <schilling@fokus.fraunhofer.de> writes:
>
>  
>
> > Bill Davidsen <davidsen@tmr.com> wrote:
> >
> >    
> >
> > > > This sounds a bit confused. Are you able to describe your concern?
> > > >
> > > >        
> > > You said star doesn't run as fast on Linux as Solaris, you can probably 
> > > fix that problem by using O_DIRECT, so the writes and reads don't 
> > > compete for the same buffer memory.
> > >      
> > And I already mentioned that it is higly improbable that O_DIRECT will
> > speed up on Linux. A better buffer cache (this means improving Linux) helps 
> > much more than avoiding it.
> >    
>
> How would a buffer cache improve the situation for star? I may have
> missed the beginning of the discussion, but caching
> write-once-then-forget data seems pointless.
>
>  
I think he means one which didn't do that useless caching, although most 
improvements also bite in some cases. I had a patch in which assumed 
that if a program wrote more than N bytes without a read or seek that 
the data should be sent to the drive NOW. Eliminated writing a full CD 
to buffer, with data from cache, then closing the file and having the 
drive go dead busy for a minute.

--
bill davidsen <davidsen@tmr.com>
 CTO TMR Associates, Inc
 Doing interesting things with small computers since 1979