From: Matthieu Patou <mat@matws.net>
To: Goswin von Brederlow <goswin-v-b@web.de>
Cc: Asdo <asdo@shiftmail.org>, linux-raid <linux-raid@vger.kernel.org>
Subject: Re: Random IO with md raid
Date: Mon, 14 Dec 2009 12:06:08 +0300 [thread overview]
Message-ID: <4B260000.3040703@matws.net> (raw)
In-Reply-To: <87hbs03y0t.fsf@frosties.localdomain>
Hello Goswin,
> Software raid1 will write twice as much data. That means twice as much
> data goes over the system bus and into the controler cache.
> Effectively you have halve the cache size. Maybe that is all you see.
>
> MfG
> Goswin
>
Your idea seems logical, and I took a few hours today to verify it and
it's the case as accessing the disk without software raid leads to
almost the same result as with hardware raid.
Matthieu.
next prev parent reply other threads:[~2009-12-14 9:06 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-04 22:31 Random IO with md raid Matthieu Patou
2009-12-05 14:20 ` Asdo
2009-12-07 22:59 ` Matthieu Patou
2009-12-09 16:36 ` Goswin von Brederlow
2009-12-14 9:06 ` Matthieu Patou [this message]
2009-12-14 10:13 ` Michael Evans
2009-12-16 11:32 ` Goswin von Brederlow
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