Re: Performance Characteristics of All Linux RAIDs (mdadm/bonnie++)

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To: Alan Cox <alan@...>
Cc: Jens Bäckman <jens.backman@...>, Justin Piszcz <jpiszcz@...>, <linux-kernel@...>, <linux-raid@...>, <xfs@...>
Date: Wednesday, May 28, 2008 - 7:00 pm

Alan Cox wrote:
I really don't think that's any part of the issue, the same memory and 
bridge went 4-5x faster in other read cases. The truth is that the 
raid-1 performance is really bad, and it's the code causing it AFAIK. If 
you track the actual io it seems to read one drive at a time, in order, 
without overlap.

-- 
Bill Davidsen <davidsen@tmr.com>
   "We have more to fear from the bungling of the incompetent than from
the machinations of the wicked."  - from Slashdot

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Re: Performance Characteristics of All Linux RAIDs (mdadm/bo..., Bill Davidsen, (Wed May 28, 7:00 pm)