Date: Fri, 27 May 2011 17:08:36 +0700 From: Vadim Goncharov <vadim_nuclight@mail.ru> To: Kirk McKusick <mckusick@FreeBSD.org> Cc: svn-src-all@FreeBSD.org Subject: Re: svn commit: r222319 - head/sbin/newfs Message-ID: <201105271008.p4RA8bgD024052@kernblitz.nuclight.avtf.net> In-Reply-To: <201105261822.p4QIMn0Y075807@svn.freebsd.org> References: <201105261822.p4QIMn0Y075807@svn.freebsd.org>
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Hi Kirk McKusick! On Thu, 26 May 2011 18:22:49 +0000 (UTC); Kirk McKusick <mckusick@FreeBSD.org> wrote: > Author: mckusick > Date: Thu May 26 18:22:49 2011 > New Revision: 222319 > URL: http://svn.freebsd.org/changeset/base/222319 > Log: > Raise the default blocksize for UFS/FFS filesystems from > 16K to 32K and the default fragment size from 2K to 4K. > > The rational is that most disks are now running with 4K > sectors. While they can (slowly) simulate 512-byte sectors > by doing a read-modify-write, it is desirable to avoid this > functionality. By raising the minimum filesystem allocation > to 4K, the filesystem will never trigger the small sector > emulation. > > Also, the growth of disk sizes has lead us to double the > default block size about every ten years. The rise from 8K > to 16K blocks was done in 2001. So, by the 10-year metric, > the time has come for 32K blocks. May be it's also the time to grow directory block size allocation? It is 512 bytes still. -- WBR, Vadim Goncharov. ICQ#166852181 mailto:vadim_nuclight@mail.ru [Moderator of RU.ANTI-ECOLOGY][FreeBSD][http://antigreen.org][LJ:/nuclight]
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