Re: abysmal performance

[Mitch Harder <mitch.harder@sabayonlinux.org>]

On Tue, May 3, 2011 at 8:03 AM, Bernhard Schmidt <berni@birkenwald.de> =
wrote:
> Hi,
>
>> Ok, looks like we could be doing a little better job when compressio=
n is
>> on to build out a bigger extent. =A0This shouldn't be causing troubl=
e on
>> an ssd at all but on your rotating disk it'll be slightly slower.
>>
>> Still most of these extents are somewhat close together, this is rou=
ghly
>> what mount -o ssd (which is enabled automatically when we detect a
>> non-rotating drive) would try for.
>>
>> The problematic files are going to have thousands of extents, this f=
ile
>> should be fine.
>
> Thanks, I'll check on my system with rotating disks at home when I ge=
t back.
>

I'd also be curious to see if mounting with "-o compress-force=3Dlzo"
affects anything.

As I recall, the compress-force option was added because performance
could be affected negatively when trying to optimize compression with
"-o compress".
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