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Date: Fri, 01 Nov 2002 04:55:14 +0300
From: Hans Reiser <reiser@namesys.com>
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To: Andrew Morton <akpm@digeo.com>
CC: =?ISO-8859-1?Q?Dieter_N=FCtzel?= <Dieter.Nuetzel@hamburg.de>,
       Jeff Garzik <jgarzik@pobox.com>,
       Linux Kernel <linux-kernel@vger.kernel.org>,
       Oleg Drokin <green@namesys.com>, zam@namesys.com,
       umka <umka@thebsh.namesys.com>
Subject: Re: [BK][PATCH] Reiser4, will double Linux FS performance, pleaseapply
References: <3DC19F61.5040007@namesys.com> <200210312334.18146.Dieter.Nuetzel@hamburg.de> <3DC1B2FA.8010809@namesys.com> <3DC1D63A.CCAD78EF@digeo.com> <3DC1D885.6030902@namesys.com> <3DC1D9D0.684326AC@digeo.com>
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Andrew Morton wrote:

>Hans Reiser wrote:
>  
>
>>Well, if we are only 2.5 times as fast for writes as ext3 after your
>>patch is applied, I'll still feel good.;-)
>>
>>    
>>
>
>whupping ext3's butt on write performance isn't very hard, really ;)
>
>But it should be done based on "feature equivalency".  By default,
>ext3 uses ordered data writes.  Data is written to disk before
>the metadata to which that data refers is committed to journal.
>
>It would be questionable to compare a metadata-only journalling
>approach to ext3 with data=journal or data=ordered.
>
>
>
>  
>
The atomic transactions that reiser4 offers are a much higher level of 
data security than data journaling.  Really, you should read the 17 page 
papers I send you URLs to;-).....
(www.namesys.com/v4/fast_reiser4.html).

-- 
Hans


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