Date: Wed, 12 Jun 2013 06:40:32 -0500 From: "Mark Felder" <feld@feld.me> To: freebsd-fs@freebsd.org Subject: Re: An order of magnitude higher IOPS needed with ZFS than UFS Message-ID: <op.wykdduw834t2sn@markf.office.supranet.net> In-Reply-To: <51B79023.5020109@fsn.hu> References: <51B79023.5020109@fsn.hu>
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On Tue, 11 Jun 2013 16:01:23 -0500, Attila Nagy <bra@fsn.hu> wrote: > BTW, the file systems are 77-78% full according to df (so ZFS holds > more, because UFS is -m 8). ZFS write performance can begin to drop pretty badly when you get around 80% full. I've not seen any benchmarks showing an improvement with a very fast and large ZIL or tons of memory, but I'd expect that would help significantly. Just note that you're right at the edge where performance gets impacted.
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