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Date: Mon, 31 Dec 2012 02:57:01 +0100
From: Joerg Sonnenberger <joerg@britannica.bec.de>
To: freebsd-hackers@freebsd.org
Subject: Re: UFS1 vs UFS2
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On Sun, Dec 30, 2012 at 08:39:26PM +0100, Paul Schenkeveld wrote:
> On Sun, Dec 30, 2012 at 02:21:26PM +0100, Wojciech Puchar wrote:
> > OpenBSD by default use UFS1 for partitions smaller than 1TB.
> > 
> > FreeBSD use always UFS2. UFS2 uses double the amount of space for inodes. 
> > basic operation seems the same.
> > 
> > Does it make sense to use UFS1 for small filesystem (on SSD) that would 
> > have few millions of files. It will take less space for inodes, but how 
> > about performance?
> 
> UFS2 became necessary when disk got bigger and sizes and block pointers
> in metadata on UFS1 became too small to fully utilize the larger disks.

There is also the possible concern of Extended Attributes. If you use
them, you might be a lot more happy with UFS2.

Joerg