Messages in this thread |  | | From | Mathieu Chouquet-Stringer <> | Subject | Re: Abysmal RAID 0 performance on 2.4.0-test10 for IDE? | Date | 28 Dec 2000 16:57:43 -0500 |
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timw@splhi.com (Tim Wright) writes:
> On Wed, Dec 27, 2000 at 04:23:43PM +0000, Paul Jakma wrote: > > On Tue, 26 Dec 2000, Ian Stirling wrote: > > > > > The PCI bus can move around 130MB/sec, > > > > in bursts yes, but sustained data bandwidth of PCI is a lot lower, > > maybe 30 to 50MB/s. And you won't get sustained RAID performance > > > sustained PCI performance. > > > > No. A well-designed card and driver doing cache-line sized transfers can > achieve ~100MB/s. On the IBM (Sequent) NUMA machines, we achieved in excess > of 3GB/s sustained read I/O (database full table scan) on a 16-quad (32 PCI > bus) system. That works out at around 100MB/s per bus.
Sadly, I am sure that your "well-designed" system must be costly as hell... :(
-- Mathieu CHOUQUET-STRINGER E-Mail : mchouque@e-steel.com Learning French is trivial: the word for horse is cheval, and everything else follows in the same way. -- Alan J. Perlis - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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