From: Andras Korn <korn@raidlist.elan.rulez.org>
To: linux-raid@vger.kernel.org
Subject: Re: write-behind has no measurable effect?
Date: Tue, 15 Feb 2011 00:03:22 +0100 [thread overview]
Message-ID: <20110214230321.GH836@hellgate.intra.guy> (raw)
In-Reply-To: <AANLkTi=fte1B=D_8=KrEf9_dVT5gAEPTy-uw1Duz_ECB@mail.gmail.com>
On Mon, Feb 14, 2011 at 02:56:37PM -0800, Doug Dumitru wrote:
> Not to be too cute, but the man page for mdadm says that
> --write-behind is only attempted on drives marked --write-mostly. I
> did not see a --write-mostly in your array create statement.
Yeah, I abbreviated it as -W:
> > mdadm --create /dev/md/ssdraid --force --assume-clean --level=1 \
> > --raid-devices=3 --bitmap=internal --bitmap-chunk=262144 \
> > /dev/sdo2 --write-behind=16383 -W /dev/sd[nm]2
> Also, are you trying to create a three-way-mirror or mirror the one
A three-way mirror.
--
Andras Korn <korn at elan.rulez.org>
Caesar si viveret, ad remum dareris.
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prev parent reply other threads:[~2011-02-14 23:03 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-14 21:38 write-behind has no measurable effect? Andras Korn
2011-02-14 22:50 ` NeilBrown
2011-02-14 22:57 ` Andras Korn
2011-02-14 23:41 ` NeilBrown
2011-02-15 1:00 ` Andras Korn
2011-02-15 1:19 ` John Robinson
2011-02-15 2:19 ` Andras Korn
[not found] ` <AANLkTikFSOePZJXknAt=Tx6+FpdJ4tiSNwpuwuPC3RY=@mail.gmail.com>
2011-02-15 9:10 ` Roberto Spadim
2011-02-15 12:40 ` Andras Korn
2011-02-15 13:26 ` Roberto Spadim
2011-02-15 17:46 ` Roberto Spadim
2011-02-16 12:00 ` Andras Korn
2011-02-16 15:00 ` Roberto Spadim
2011-02-14 22:56 ` Doug Dumitru
2011-02-14 23:03 ` Andras Korn [this message]
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