Date: Tue, 20 Jun 2017 14:52:59 -0400 From: Mike Tancsa <mike@sentex.net> To: Karl Denninger <karl@denninger.net>, "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org> Subject: Re: FreeBSD 11.1 Beta 2 ZFS performance degradation on SSDs Message-ID: <aba7f011-5eac-8c39-114f-feca52f35f36@sentex.net> In-Reply-To: <4276a57b-5974-0d4b-c535-ea11c491b46f@denninger.net> References: <2d8a525e5355406aa7b8bf6690101008@DM2PR58MB013.032d.mgd.msft.net> <4276a57b-5974-0d4b-c535-ea11c491b46f@denninger.net>
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On 6/20/2017 1:58 PM, Karl Denninger wrote: > > I suspicious of a drive firmware interaction with your I/O pattern; SSDs > are somewhat-notorious for having that come up under certain workloads > that involve a lot of writes. I wonder repeating the tests with plain old hard drives would show the same behavior ? ---Mike -- ------------------- Mike Tancsa, tel +1 519 651 3400 Sentex Communications, mike@sentex.net Providing Internet services since 1994 www.sentex.net Cambridge, Ontario Canada http://www.tancsa.com/
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