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Date:      Sun, 22 Aug 1999 12:52:32 +0200
From:      Poul-Henning Kamp <phk@critter.freebsd.dk>
To:        Doug <Doug@gorean.org>
Cc:        cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG
Subject:   Re: cvs commit: src/release/sysinstall install.c label.c options.csysinstall.h 
Message-ID:  <2769.935319152@critter.freebsd.dk>
In-Reply-To: Your message of "Sat, 21 Aug 1999 18:12:41 PDT." <37BF4E89.D3CD53C2@gorean.org> 

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In message <37BF4E89.D3CD53C2@gorean.org>, Doug writes:
>Poul-Henning Kamp wrote:
>>
>>   The default is still "-b 8192 -f 1024" but my experiments show that
>>   "-b 16384 -f 4096 -c 100" is a more sensible value for modern
>>   disksizes.
>
>	I'm curious, why is making the block size bigger a better thing? I would
>think that with disks getting bigger all the time we'd want to decrease the
>block size to avoid the wastage of unused partial blocks being multiplied
>over very large disks. This is a legitimate request for info, I'm not an fs
>expert by any means. 

The short answer is performance.  But it is rather complicated really.
I suggest you read the mail-archive for the fs@ list where this has been
discussed recently.

--
Poul-Henning Kamp             FreeBSD coreteam member
phk@FreeBSD.ORG               "Real hackers run -current on their laptop."
FreeBSD -- It will take a long time before progress goes too far!


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