Date: Fri, 18 Jan 2013 10:09:11 +0100 (CET) From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> To: Stefan Esser <se@freebsd.org> Cc: freebsd-hackers@freebsd.org Subject: Re: stupid UFS behaviour on random writes Message-ID: <alpine.BSF.2.00.1301181007120.10373@wojtek.tensor.gdynia.pl> In-Reply-To: <50F90C0F.5010604@freebsd.org> References: <103826787.2103620.1358463687244.JavaMail.root@erie.cs.uoguelph.ca> <50F90C0F.5010604@freebsd.org>
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> > But I doubt that such a change would improve performance in the you doubt but i am sure it would improve it a lot. Just imagine multiple VM images on filesystem, running windoze with 4kB cluster size, each writing something. no matter what is written from within VM it ends up as read followed by write, unless blocks are already in buffer cache.
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