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Date:      Wed, 6 May 2009 20:30:17 +0200 (CEST)
From:      Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To:        Benjamin Krueger <benjamin@seattlefenix.net>
Cc:        freebsd-performance@freebsd.org, Olivier Mueller <om-lists-bsd@omx.ch>, Bill Moran <wmoran@potentialtech.com>, freebsd-questions@freebsd.org
Subject:   Re: filesystem: 12h to delete 32GB of data
Message-ID:  <alpine.BSF.2.00.0905062029510.34023@wojtek.tensor.gdynia.pl>
In-Reply-To: <4A01C202.8080803@seattlefenix.net>
References:  <1241610888.16418.64.camel@ompc.insign.local> <20090506084834.61600c42.wmoran@potentialtech.com> <alpine.BSF.2.00.0905061734380.32591@wojtek.tensor.gdynia.pl> <4A01C202.8080803@seattlefenix.net>

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>> config, or gmirror/gstripe config.
>> 
>> usually it's far much slower
>
> Sorry, but my experience with that very server using a P400 controller with 
> 256MB write cache is very different. My benchmarks showed that controller 
> using Raid5 (with only 4 disks) is significantly faster than software 
> layouts.

possibly with RAID5, but for sure slower than single drive

> The days when hardware controllers could automatically be considered slow are 
> long gone.

unfortunately not.



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