svn commit: r222319 - head/sbin/newfs
Vadim Goncharov
vadim_nuclight at mail.ru
Fri May 27 10:08:45 UTC 2011
Hi Kirk McKusick!
On Thu, 26 May 2011 18:22:49 +0000 (UTC); Kirk McKusick <mckusick at 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 at mail.ru
[Moderator of RU.ANTI-ECOLOGY][FreeBSD][http://antigreen.org][LJ:/nuclight]
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