Date: Tue, 25 Jun 2019 14:35:40 -0400 From: mike tancsa <mike@sentex.net> To: freebsd-questions@freebsd.org Subject: Re: ZFS Optimizing for large directories and MANY files Message-ID: <37d87f73-0e67-f87d-90f1-1f098d91876d@sentex.net> In-Reply-To: <e3168936-9c39-2e8c-2d37-b1bf8da03b08@sentex.net> References: <e3168936-9c39-2e8c-2d37-b1bf8da03b08@sentex.net>
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On 6/25/2019 2:19 PM, mike tancsa wrote: > /|# time find . -type f -mtime -2d|/ > > /|takes 40 min after a cold boot.|/ > > /|Watching zfs disk IO, its super slow in terms of bandwidth, but gstat > shows the disks close to being pegged. I guess the heads are thrashing > about inefficiently ? Just for comparison, I tried the same test on the new box that will be in production. With SSDs (instead of spinning metal) the same find on a cold boot takes 1.318u 55.396s 1:21.96 69.1% 35+176k 865535+0io 0pf+0w and the second time through, just 1.102u 48.666s 0:49.96 99.5% 35+177k 169189+0io 0pf+0w ---Mike
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