Date: Wed, 09 Jul 2008 00:41:11 +0200 From: Kris Kennaway <kris@FreeBSD.org> To: Kris Kennaway <kris@FreeBSD.org> Cc: freebsd-fs@freebsd.org Subject: Re: Thinking of using ZFS/FBSD for a backup system Message-ID: <4873ED07.8060105@FreeBSD.org> In-Reply-To: <4873ECE0.5090706@FreeBSD.org> References: <bd9320b30807072315x105cf058tf9f952f0f5bb2a6a@mail.gmail.com> <20080708100701.57031cda@twoflower.in.publishing.hu> <bd9320b30807080131j5e0e02a4y3231d7bfa1738517@mail.gmail.com> <4873C4FA.2020004@FreeBSD.org> <4873E068.8060305@psg.com> <4873E0AE.6090305@psg.com> <bd9320b30807081531x4ba92c92lbcfcbeba059237af@mail.gmail.com> <4873ECE0.5090706@FreeBSD.org>
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Kris Kennaway wrote: > mike wrote: >> On 7/8/08, Randy Bush <randy@psg.com> wrote: >> >>> <sigh>. first cuppa. it's 4g >> >> okay, so it sounds like from multiple people this could be doable and >> stable enough: >> >> dual or quad-core current gen processor (amd64) >> 4g ram >> 4 or 6x 1tb disks >> freebsd 7.0-release >> >> these tweaks to /boot/loader.conf: >> >> vm.kmem_size=600M >> vm.kmem_size_max=600M >> vfs.zfs.prefetch_disable=1 >> >> right? > > Might be enough kmem, if not, or if you want better performance from > increased caching, increase as high as 1500M > > Kris > > Also test with/without prefetch to see which is faster on your workload. Kris
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