Date: Mon, 09 Aug 2010 22:45:08 -0400 From: Andriy Bakay <andriy@irbisnet.com> To: freebsd-fs@freebsd.org Subject: Re: Converting sysinstalled FreeBSD into ZFS-only server. Message-ID: <4C60BD34.7020805@irbisnet.com> In-Reply-To: <20100809221423.GF4964@tolstoy.tols.org> References: <f901f2c14a4f2822360a0284fc468239@irbisnet.com> <20100809221423.GF4964@tolstoy.tols.org>
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> On Mon, Aug 09, 2010 at 04:22:42PM -0400, Andriy Bakay wrote: >> 1. In your post you are using dedicated partition for swap. Did it provide >> any advantages versus swap on ZFS volume? > > For this one I think the answer is that it is very common to set dumpdev > in /etc/rc.conf to your swap device. Dumping core to a software raid > is, uhm, suboptimal. :-) > Yes, I know ZFS volume cannot be used as dumpdev (sorry I should put it in my question) and ZFS volume did not guaranteed to be contiguous (which could be performance consideration), but beside this, what else? >> 2. You are suggesting to set 'vm_kmem_size' value to 150% of RAM. What >> pros. and cons. against following formula: >> >> vm_kmem_size = RAM / 2 >> vfs.zfs.arc_max = vm_kmem_size - 512M >> >> 3. Could you be more verbose about your ZFS layout, what major advantages >> it provide against for example the following: >> http://wiki.freebsd.org/RootOnZFS/GPTZFSBoot. I found it very interesting >> but I need more info. > > Me 2. > > Marco van Tol >
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