Date: Sat, 14 Apr 2012 21:37:38 +0200 (CEST) From: Richard Kojedzinszky <krichy@tvnetwork.hu> To: freebsd-security@freebsd.org Subject: ufs multilabel performance (fwd) Message-ID: <alpine.DEB.2.02.1204142134050.8001@krichy.tvnetwork.hu>
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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' 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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