linux-kernel - Re: Understanding I/O behaviour

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Date:	Thu, 30 Aug 2007 03:26:22 -0700 (PDT)
From:	Martin Knoblauch <spamtrap@...bisoft.de>
To:	Robert Hancock <hancockr@...w.ca>,
	Jens Axboe <jens.axboe@...cle.com>
Cc:	Martin Knoblauch <spamtrap@...bisoft.de>,
	linux-kernel@...r.kernel.org,
	Peter zijlstra <a.p.zijlstra@...llo.nl>, mingo@...hat.com
Subject: Re: Understanding I/O behaviour - next try


--- Robert Hancock <hancockr@...w.ca> wrote:

> 
> I saw a bulletin from HP recently that sugggested disabling the 
> write-back cache on some Smart Array controllers as a workaround
> because 
> it reduced performance in applications that did large bulk writes. 
> Presumably they are planning on releasing some updated firmware that 
> fixes this eventually..
> 
> -- 
> Robert Hancock      Saskatoon, SK, Canada
> To email, remove "nospam" from hancockr@...pamshaw.ca
> Home Page: http://www.roberthancock.com/
> 
Robert,

 just checked it out. At least with the "6i", you do not want to
disable the WBC :-) Performance really goes down the toilet for all
cases.

 Do you still have a pointer to that bulletin?

Cheers
Martin

------------------------------------------------------
Martin Knoblauch
email: k n o b i AT knobisoft DOT de
www:   http://www.knobisoft.de
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