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Re: Xfs delaylog hanged up

To: Spelic <spelic@xxxxxxxxxxxxx>
Subject: Re: Xfs delaylog hanged up
From: Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>
Date: Wed, 24 Nov 2010 08:44:43 +0100
Cc: xfs@xxxxxxxxxxx
In-reply-to: <4CEC5E15.7080307@xxxxxxxxxxxxx>
Organization: Intellique
References: <4CEAC412.9000406@xxxxxxxxxxxxx> <20101122232929.GJ13830@dastard> <4CEBA2D5.2020708@xxxxxxxxxxxxx> <20101123204609.GW22876@dastard> <20101123234811.0ea3c41c@xxxxxxxxxxxxxx> <4CEC5E15.7080307@xxxxxxxxxxxxx>
Le Wed, 24 Nov 2010 01:36:37 +0100 vous écriviez:

> What would be the advantage of using hardware raid?

More predictable performance under heavy load (nfs kernel server,
typically). BTW the 3Ware is not a very good sata controller; I've found
that it is actually one of the worst of its class when it comes to
IOPS, the Areca 16xx, LSI Megaraid and Adaptec 5xx5 all perform better
as simple controllers in combination with MD (tested with 8 SSDs).

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