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Date:      Mon, 2 Jul 2007 00:52:29 +0300
From:      Nikolay Pavlov <quetzal@zone3000.net>
To:        Nguyen Tam Chinh <unixvn@gmail.com>
Cc:        freebsd-stable@freebsd.org, FreeBSD-Questions <freebsd-questions@freebsd.org>
Subject:   Re: UFS2 optimization for many small files
Message-ID:  <20070701215229.GB10527@zone3000.net>
In-Reply-To: <64b284310706270311j2a6af2f6i6766b483a4b66a5c@mail.gmail.com>
References:  <64b284310706270311j2a6af2f6i6766b483a4b66a5c@mail.gmail.com>

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On Wednesday, 27 June 2007 at 14:11:19 +0400, Nguyen Tam Chinh wrote:
> Greetings,
> 
> We're going to build a server with some 1Tb of over 500 million small
> files with size from 0,5k to 4k.  I'm wonder if the ufs2 can handle
> this kind of system well. From newfs(8) the min block size is 4k. This
> is not optimal in our case, a 1k or 0,5k block is more effective IMHO.
> I'd be happy if anyone can suggest what does fragment (block/8) in the
> ufs2 mean and how this parameter works. I know It's better to read the
> full ufs2 specification, but hope that someone here can give a hint.
> Please advice with optimizations or tricks.
> Thank you very much.
> 
> -- 
> With best regards,        |         The Power to Serve
> Nguyen Tam Chinh      |      http://www.FreeBSD.org
> _______________________________________________
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I am not aware of any ZFS results on such tasks, may be you will be the
one who share them ;) However RaiserFS whould be the best choise on such
spesific case. It's not available on FreeBSD currently.
I don't think UFS can handle a huge amount of small files effectively.  
Of course gjournal could be an option for fsck problems, but how do you
plan to backup or sync this storage?

-- 
======================================================================  
- Best regards, Nikolay Pavlov. <<<-----------------------------------    
======================================================================  




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