Date: Thu, 26 Apr 2007 11:47:12 +0800 From: Oleg Gritsak <go@sib-ecometall.ru> To: freebsd-stable@freebsd.org Subject: UFS: optimization changed Message-ID: <20070426034712.GA57273@go.sib-ecometall.ru>
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Hello, dear sirs! I'm just curious about some possible mismatch in between documentation and reallife OS behaviour... Noticed this thing for more than two years ago in 4.X and now seing this in 6.2... It is said in "man newfs" and "man tunefs" that threshhold for online optimization (space or time) is 8 percent. But actually, FreeBSD switches to SPACE far more earlier (or at least reports to system message buffer). Does it have any sense? As also noted in "man newfs", the performance while optimizing for space fragmentation is reduced. So, why FreeBSD does this when file system is for example 50% empty and has 4-5GBs of free space? -- системный администратор ООО "Сиб-ЭкоМеталл" тел. (3912) 609942 (144)
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