ufs multilabel performance (fwd)

[O. Hartmann]

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 at tvnetwork.hu>
> To: freebsd-performance at 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
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