Re: ufs multilabel performance (fwd)

Thank you for the reply.

Unfortunately, dont know why, but on my xen virtualised environment, fbsd 
amd64 domU performs much slower, not only 30 times. Without multilabel, 
file creation speed is around 2500/s, but with multilabels enabled, it is 
only 15/s (!). so it is more than 100 times slower.

And anyway freebsd is known to be fast as well, as functional. The power 
to serve. :)

But in my environment, 15/s file creation is very-very slow. The hardware 
is a q6700 cpu with 4G ram, 2x1T sata disks in raid1, the host runs linux. 
I think with this hw the mentioned speed is really slow.

Regards,

Kojedzinszky Richard
Euronet Magyarorszag Informatikai Zrt.

On Sun, 15 Apr 2012, O. Hartmann wrote:

> Date: Sun, 15 Apr 2012 13:20:23 +0200
> From: O. Hartmann <ohartman@zedat.fu-berlin.de>
> To: Richard Kojedzinszky <krichy@tvnetwork.hu>
> Cc: freebsd-security@freebsd.org
> Subject: Re: ufs multilabel performance (fwd)
> 
> Am 04/14/12 21:37, schrieb Richard Kojedzinszky:
>> Dear list,
>>
>> Although it is not only security-related question, I did not get any
>> answer from freebsd-performance. The original question is below.
>>
>> Can someone give some advice?
>>
>> Thanks in advance,
>>
>>
>> Kojedzinszky Richard
>> Euronet Magyarorszag Informatikai Zrt.
>>
>> ---------- Forwarded message ----------
>> Date: Thu, 10 Nov 2011 06:16:57 +0100 (CET)
>> From: Richard Kojedzinszky <krichy@tvnetwork.hu>
>> To: freebsd-performance@freebsd.org
>> Subject: ufs multilabel performance
>>
>> Dear List,
>>
>> I've noticed that when I enable multilabel on an fs, a file creation
>> gets around 20-30 times slower than without multilabel set.
>>
>> This one-liner can be used to test the differences:
>> $ truss -D perl -e 'open(F, ">$_.file") for 1 .. 1000'
>
> Same here, creating files seems to be 10 - 30 times slower with
> multilabels as it is without.
>
> But as several posts and discussions reflects, FreeBSD isn't supposed to
> be fast although it is claimed that writing is the major than reading;
> FBSD should serve functionality.
>>
>> And one can see that the open call takes much more when multilabel is
>> set on an fs. It seems that only file creation needs that many time,
>> when a file exists it is opened much faster.
>>
>> Could someone acknowledge this, and have some suggestions how to make it
>> faster?
>>
>> Regards,
>>
>>
>> Kojedzinszky Richard
>> TvNetWork Nyrt.
>> E-mail: krichy (at) tvnetwork [dot] hu
>> PGP: 0x54B2BF0C8F59B1B7
>>   Fingerprint = F6D4 3FFE AF03 CACF 0DCB  46A1 54B2 BF0C 8F59 B1B7
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>
>
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