Date: Wed, 17 Mar 2010 15:37:33 -0300 From: Thiago Damas <tdamas@gmail.com> To: =?ISO-8859-1?Q?Dag=2DErling_Sm=F8rgrav?= <des@des.no> Cc: Olivier Smedts <olivier@gid0.org>, freebsd-hackers@freebsd.org, Mohacsi Janos <mohacsi@niif.hu> Subject: Re: ATA 4K sector issues Message-ID: <f8e3d83f1003171137t1b963a68s14f336436b57dc59@mail.gmail.com> In-Reply-To: <864oke6bwd.fsf@ds4.des.no> References: <alpine.BSF.2.00.1003171114280.74067@mignon.ki.iif.hu> <86tysf58a2.fsf@ds4.des.no> <alpine.BSF.2.00.1003171652260.74067@mignon.ki.iif.hu> <f8e3d83f1003171034m5e75eae4r5e8b31d88d361d3b@mail.gmail.com> <367b2c981003171112n785ea9d4q21d00b533819ca67@mail.gmail.com> <f8e3d83f1003171117k20d553b7y7ce4c3c8ed2f5c96@mail.gmail.com> <864oke6bwd.fsf@ds4.des.no>
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With UFS, I previouly did some tests (in portuguese):
Partition without begin aligned:
=3D> 34 1953525101 ad4 GPT (932G)
34 1953525101 1 freebsd-ufs (932G)
newfs -U (default -f 2048 -b 16384)
# time tar xfj
/install/releases/i386/8.0-RELEASE/8.0-RELEASE/ports/ports.tgz
2.342u 5.013s 20:35.65 0.5% 64+1091k 6623+2734io 0pf+0w
newfs -U -f 4096 -b 32768
# time tar xfj
/install/releases/i386/8.0-RELEASE/8.0-RELEASE/ports/ports.tgz
2.590u 5.263s 22:06.32 0.5% 63+1087k 10911+1676io 0pf+0w
Partition aligned on 4k boundaries
=3D> 34 1953525101 ad4 GPT (932G)
34 30 - free - (15K)
64 1953525071 1 freebsd-ufs (932G)
newfs -U (default -f 2048 -b 16384)
# time tar xfj
/install/releases/i386/8.0-RELEASE/8.0-RELEASE/ports/ports.tgz
2.392u 5.000s 10:24.15 1.1% 64+1095k 8375+2735io 0pf+0w
newfs -U -f 4096 -b 32768
# time tar xfj
/install/releases/i386/8.0-RELEASE/8.0-RELEASE/ports/ports.tgz
2.547u 5.567s 1:25.50 9.4% 64+1088k 11880+1755io 0pf+0w
Aligning the partition, and ajusting the block/fragment size, I went
from 22minutes to 1m25s.
But, I tried every combination possible with ZFS, and always get
slow performance (something like 2, 3 MB/s write speed)
2010/3/17 Dag-Erling Sm=F8rgrav <des@des.no>
> Thiago Damas <tdamas@gmail.com> writes:
> > With UFS, I previouly did some tests (in portuguese):
>
> Some commentary would be nice.
>
> DES
> --
> Dag-Erling Sm=F8rgrav - des@des.no
>
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