Re: dvd+rw-tools update [6.0, DVD-R DL]
Bill Davidsen <firstname.lastname@example.org> wrote:
> >But now I see where you like to use O_DIRECT.
> >If you use O_DIRECT for writing, it makes sense and in the same case
> >it makes sense to use directio(fd, DIRECTIO_ON); on Solaris.
> By not buffering the output of mkisofs, for example, buffer space is
> available for reading. This makes a small improvement on a large memory,
> much more as the memory is smaller and read ahead could be impacted by
> buffering writes.
> >Although on Solaris, it only saves System CPU time and I cannot see
> >an wall clock improvement.
> I haven't tested there, and I bet you have not tested in small memory (I
> use 160MB for test).
> >Whether this makes sense with the _output_ file from star or mkisofs
> >needs to be tested.....
> I had not tried with the output of star, that's an interesting suggestion.
I did try it recently with creating a SchilliX ISO image (~ 20000 files
700 MB) and it did not help.
EMail:email@example.com (home) Jörg Schilling D-13353 Berlin
firstname.lastname@example.org (work) Blog: http://schily.blogspot.com/
URL: http://cdrecord.berlios.de/old/private/ ftp://ftp.berlios.de/pub/schily