From owner-freebsd-arch  Sat Nov 24 11:12:35 2001
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From: "Jeroen C. van Gelderen" <jeroen@vangelderen.org>
To: "'Matthew Dillon'" <dillon@apollo.backplane.com>,
	"'Kirk McKusick'" <mckusick@beastie.mckusick.com>
Cc: "'Sheldon Hearn'" <sheldonh@starjuice.net>,
	<freebsd-arch@FreeBSD.ORG>
Subject: RE: Using a larger block size on large filesystems 
Date: Sat, 24 Nov 2001 15:08:22 -0400
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Nice to hear that non-experts like me will be getting good defaults!

<<p.s. side note on the buffer cache:  The buffer cache is optimized
for both 1K/8K and 2K/16K, but it is *NOT* optimized for anything
larger.  2K/16K is thus the largest configuration we can use optimally
in regards to the buffer cache.>>

Is it worth printing this (or a variation) as a diagnostic when newfs 
is invoked with a larger setting? It would help those who learn by
trial-and-error. It may even prevent an unfavourable benchmark report 
in the future: 
  "FreeBSD performance lousy for 4K/32K filesystem." 
  "Duh, newfs told you so!"

Cheers,
-J



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