[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Re: Growisofs input cache (get away from dd?)

Andy Polyakov <appro@fy.chalmers.se> wrote:

> >> not passing
> >> multiple GB of once-used data through the system buffers and blowing
> >> everything else out.
> > 
> > I see some effects which could make the O_DIRECT
> > approach less superior to normal reading than your
> > scenario would let expect:
> O_DIRECT is not about superior performance, it's more about *maintaining 
> adequate _overall_ performance* in wider range of practical situations, 
> most notably under low memory conditions.

On a platform with a decent virtutal memory implementation, thiks is not needed
and BTW: O_DIRECT is not available on UNIX.


 EMail:joerg@schily.isdn.cs.tu-berlin.de (home) Jörg Schilling D-13353 Berlin
       js@cs.tu-berlin.de                (uni)  
       schilling@fokus.fraunhofer.de     (work) Blog: http://schily.blogspot.com/
 URL:  http://cdrecord.berlios.de/private/ ftp://ftp.berlios.de/pub/schily

Reply to: