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Re: 12x performance drop on md/linux+sw raid1 due to barriers [xfs]

To: linux-xfs@xxxxxxxxxxx
Subject: Re: 12x performance drop on md/linux+sw raid1 due to barriers [xfs]
From: Martin Steigerwald <Martin@xxxxxxxxxxxx>
Date: Sun, 14 Dec 2008 19:35:36 +0100
Cc: Linux RAID <linux-raid@xxxxxxxxxxxxxxx>
In-reply-to: <18757.4606.966139.10342@xxxxxxxxxxxxxxxxxx>
References: <alpine.DEB.1.10.0812060928030.14215@xxxxxxxxxxxxxxxx> <1229225480.16555.152.camel@localhost> <18757.4606.966139.10342@xxxxxxxxxxxxxxxxxx> (sfid-20081214_183524_928808_CA8411E0)
User-agent: KMail/1.9.9
Am Sonntag 14 Dezember 2008 schrieb Peter Grandi:
> First of all, why are you people sending TWO copies to the XFS
> mailing list? (to both linux-xfs@xxxxxxxxxxx and xfs@xxxxxxxxxxx).
[...]
> > So its really more of an expectation that wc+barriers on,
> > performs better than wc+barriers off :)
>
> This is of course a misstatement: perhaps you intended to write
> that ''wc on+barriers on'' would perform better than ''wc off +
> barriers off'.

I think Redeeman said exactly that ;-). Either both on or both off.

-- 
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA  B82F 991B EAAC A599 84C7

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