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To: Hans Reiser <reiser@namesys.com>
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       Reiserfs developers mail-list <Reiserfs-Dev@namesys.com>,
       Oleg Drokin <green@namesys.com>, Nikita Danilov <Nikita@namesys.com>,
       cliffw@osdl.org
Subject: Re: We need help benchmarking and debugging reiser4 
In-Reply-To: Message from Hans Reiser <reiser@namesys.com> 
   of "Wed, 30 Oct 2002 11:30:31 +0300." <3DBF98A7.8060906@namesys.com> 
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Date: Fri, 01 Nov 2002 14:36:52 -0800
From: Cliff White <cliffw@osdl.org>
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> Can some of you help us by doing such things as replicating our 
> benchmarks, and helping us debug it as we enter the last stretch before 
> Halloween?
> 

We are interested in helping, but i haven't seen the follow-up mail 
mentioned below - if you could send us some more specifics, we'd be
glad to join the fun.
cliffw
OSDL

> Nikita and Oleg will describe the details of what to do to replicate the 
> benchmarks, please be sure to use reiser4 readdir order for writes to 
> reiser4 (that means don't use tarballs made from ext2 (Remember that 
> writes determine subsequent read performance.)), and to use the latest 
> hard drives and fast processors with udma 5 turned on.  We are quite 
> sensitive to transfer speed since we do a good job of avoiding seeks.  
> We are sensitive to readdir order because we sort directory entries 
> (which is necessary for having efficient large directory lookups).   In 
> reiser4.1 we will ship a repacker, and then it won't matter what order 
> you do writes in so long as the repacker gets a chance to run at night.  
> 
> -- 
> Hans
> 
> 
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