Re: direct (unbufferd) disk access
Matthew Jacob (mjacob@feral.com)
Mon, 28 Jun 1999 09:24:06 -0700 (PDT)
> On Sat, 26 Jun 1999 00:06:53 -0400, Douglas Gilbert
> <dgilbert@interlog.com> said:
>
> > You may like to look at:
>
> > http://www.torque.net/sg [and follow the "timings" link]
>
> > to get a feeling for what direct versus indirect IO is
> > costing you. Reasonably standard i386 hardware can get
> > you 20 to 30 MB/sec throughput using "indirect IO".
>
> Given that we have clocked reasonably standard i386 hardware with fast
> disks at 50 or 60 MB/sec through the filesystem, I doubt that the
> indirect IO is the bottleneck in those cases.
Without cache pollution?
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