How to fasten btrfs?

How to fasten btrfs?

[Magicloud Magiclouds]

Hi,
  I am using 2.6.36.3 kernel with btrfs, 512MB memory and a very slow
disk, no special options for mounting btrfs except noatime. Now I
found it very slow. When I rm a 5GB movie, it took 20 secs.
--=20
=E7=AB=B9=E5=AF=86=E5=B2=82=E5=A6=A8=E6=B5=81=E6=B0=B4=E8=BF=87
=E5=B1=B1=E9=AB=98=E5=93=AA=E9=98=BB=E9=87=8E=E4=BA=91=E9=A3=9E
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Re: How to fasten btrfs?

[Hubert Kario]

On Tuesday 25 of January 2011 07:45:02 Magicloud Magiclouds wrote:
> Hi,
>   I am using 2.6.36.3 kernel with btrfs, 512MB memory and a very slow
> disk, no special options for mounting btrfs except noatime. Now I
> found it very slow. When I rm a 5GB movie, it took 20 secs.

try mounting with nodatacow and defragment the directory the file resid=
es in

Regards
--=20
Hubert Kario
QBS - Quality Business Software
02-656 Warszawa, ul. Ksawer=C3=B3w 30/85
tel. +48 (22) 646-61-51, 646-74-24
www.qbs.com.pl
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Re: How to fasten btrfs?

[Magicloud Magiclouds]

So you were saying that, even an unlink operation, the system walks
through all file data blocks? I thought unlink wouldn't have to write
too much data.

On Tue, Jan 25, 2011 at 6:30 PM, Hubert Kario <hka@qbs.com.pl> wrote:
> On Tuesday 25 of January 2011 07:45:02 Magicloud Magiclouds wrote:
>> Hi,
>> =C2=A0 I am using 2.6.36.3 kernel with btrfs, 512MB memory and a ver=
y slow
>> disk, no special options for mounting btrfs except noatime. Now I
>> found it very slow. When I rm a 5GB movie, it took 20 secs.
>
> try mounting with nodatacow and defragment the directory the file res=
ides in
>
> Regards
> --
> Hubert Kario
> QBS - Quality Business Software
> 02-656 Warszawa, ul. Ksawer=C3=B3w 30/85
> tel. +48 (22) 646-61-51, 646-74-24
> www.qbs.com.pl
>



--=20
=E7=AB=B9=E5=AF=86=E5=B2=82=E5=A6=A8=E6=B5=81=E6=B0=B4=E8=BF=87
=E5=B1=B1=E9=AB=98=E5=93=AA=E9=98=BB=E9=87=8E=E4=BA=91=E9=A3=9E
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Re: How to fasten btrfs?

[Hubert Kario]

On Tuesday, January 25, 2011 15:28:11 Magicloud Magiclouds wrote:
> So you were saying that, even an unlink operation, the system walks
> through all file data blocks? I thought unlink wouldn't have to write
> too much data.

No, but the amount of data to be changed if the number of extents is sm=
all=20
will be lower.

>=20
> On Tue, Jan 25, 2011 at 6:30 PM, Hubert Kario <hka@qbs.com.pl> wrote:
> > On Tuesday 25 of January 2011 07:45:02 Magicloud Magiclouds wrote:
> >> Hi,
> >>   I am using 2.6.36.3 kernel with btrfs, 512MB memory and a very s=
low
> >> disk, no special options for mounting btrfs except noatime. Now I
> >> found it very slow. When I rm a 5GB movie, it took 20 secs.
> >=20
> > try mounting with nodatacow and defragment the directory the file r=
esides
> > in
> >=20
> > Regards
> > --
> > Hubert Kario
> > QBS - Quality Business Software
> > 02-656 Warszawa, ul. Ksawer=C3=B3w 30/85
> > tel. +48 (22) 646-61-51, 646-74-24
> > www.qbs.com.pl

--=20
Hubert Kario
QBS - Quality Business Software
02-656 Warszawa, ul. Ksawer=C3=B3w 30/85
tel. +48 (22) 646-61-51, 646-74-24
www.qbs.com.pl
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