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Date:      Mon, 11 Jun 2012 08:28:49 -0600 (MDT)
From:      Warren Block <wblock@wonkity.com>
To:        Robert Huff <roberthuff@rcn.com>
Cc:        questions@freebsd.org
Subject:   Re: speed of "dump"
Message-ID:  <alpine.BSF.2.00.1206110827304.82724@wonkity.com>
In-Reply-To: <20437.57631.776197.982243@jerusalem.litteratus.org>
References:  <201206110559.q5B5x0Vu096317@jerusalem.litteratus.org> <20437.57631.776197.982243@jerusalem.litteratus.org>

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On Mon, 11 Jun 2012, Robert Huff wrote:

>
> 	Another thread, which I seem to have lost, was talking about
> dump and sizing its cache.
> 	Per my promise, appended is the log of this morning's level 0 dump,
> using C=32.  THe system is -CURRENT from March, using AMD Phemon II
> x4/3ghz and SATA 3gbit drives (one internal, one external.).
>
>  DUMP: finished in 1746 seconds, throughput 19568 KBytes/sec

Are you using -b64 ?  That can make a serious throughput improvement 
over smaller values.



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