Re: Performance issue with 2.6 md raid0

[Nick Piggin]

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?

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