Messages in this thread | | | Date | Thu, 5 Feb 2004 17:04:15 +0100 (MET) | From | Mattias Wadenstein <> | Subject | Re: Performance issue with 2.6 md raid0 |
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On Fri, 6 Feb 2004, Nick Piggin wrote:
> Mattias Wadenstein wrote: > > >Greetings. > > > >While testing a file server to store a couple of TB in resonably large > >files (>1G), I noticed an odd performance behaviour with the md raid0 in a > >pristine 2.6.2 kernel as compared to a 2.4.24 kernel. > > > >When striping two md raid5:s, instead of going from about 160-200MB/s for > >a single raid5 to 300M/s for the raid0 in 2.4.24, the 2.6.2 kernel gave > >135M/s in single stream read performance. > > Can you try booting with elevator=deadline please?
Ok, then I get 253267 kB/s write and 153187 kB/s read from the raid0. A bit better, but still nowhere near the 2.4.24 numbers.
For a single raid5, 158028 kB/s write and 162944 kB/s read.
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