Date: Sun, 15 Sep 2019 19:44:05 +0200 From: Miroslav Lachman <000.fbsd@quip.cz> To: Dimitry Andric <dim@FreeBSD.org> Cc: FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org> Subject: Re: ZFS... / scrub speed up Message-ID: <774cc66f-dd61-c666-6c4f-81c5c2d916b1@quip.cz> In-Reply-To: <5de7f3d3-b34c-0382-b7d4-b7e38339649b@quip.cz> References: <30506b3d-64fb-b327-94ae-d9da522f3a48@sorbs.net> <5ED8BADE-7B2C-4B73-93BC-70739911C5E3@sorbs.net> <d0118f7e-7cfc-8bf1-308c-823bce088039@denninger.net> <2e4941bf-999a-7f16-f4fe-1a520f2187c0@sorbs.net> <20190430102024.E84286@mulder.mintsol.com> <41FA461B-40AE-4D34-B280-214B5C5868B5@punkt.de> <20190506080804.Y87441@mulder.mintsol.com> <08E46EBF-154F-4670-B411-482DCE6F395D@sorbs.net> <33D7EFC4-5C15-4FE0-970B-E6034EF80BEF@gromit.dlib.vt.edu> <A535026E-F9F6-4BBA-8287-87EFD02CF207@sorbs.net> <a82bfabe-a8c3-fd9a-55ec-52530d4eafff@denninger.net> <a1b78a63-0ef1-af51-4e33-a9a97a257c8b@sorbs.net> <CAMPTd_A7RYJ12pFyY4TzbXct82kWfr1hcEkSpDg7bjP25xjJGA@mail.gmail.com> <d91cf5@sorbs.net> <7D18A234-E7BF-4855-BD51-4AE2253DB1E4@sorbs.net> <E68600B3-F856-4909-AB6E-BDFCD8AAAB43@punkt.de> <805ee7f1-83f6-c59e-8107-4851ca9fce6e@quip.cz> <E980141F-48D9-4870-8FE1-9A5610F12826@FreeBSD.org> <5de7f3d3-b34c-0382-b7d4-b7e38339649b@quip.cz>
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Miroslav Lachman wrote on 2019/05/09 13:36: > Dimitry Andric wrote on 2019/05/09 13:02: >> On 9 May 2019, at 10:32, Miroslav Lachman <000.fbsd@quip.cz> wrote: > > [...] > >>> Disks are OK, monitored by smartmontools. There is nothing odd, just >>> the long long scrubs. This machine was started with 4x 1TB (now 4x >>> 4TB) and scrub was slow with 1TB disks too. This machine - HP ML110 >>> G8) was my first machine with ZFS. If I remember it well it was >>> FreeBSD 7.0, now running 11.2. Scrub was / is always about one week. >>> (I tried some sysctl tuning without much gain) >> >> Unfortunately https://svnweb.freebsd.org/changeset/base/339034, which >> greatly speeds up scrubs and resilvers, was not in 11.2 (since it was >> cut at r334458). >> >> If you could update to a more recent snapshot, or try the upcoming 11.3 >> prereleases, you will hopefully see much shorter scrub times. > > Thank you. I will try 11-STABLE / 11.3-PRERELEASE soon and let you know > about the difference. Little bit late because I run scrub once per 60 days. Now on FreeBSD 11.3-RELEASE-p3 scrub takes 2 days and 10 hours instead of 1 week. This is a great improvement! Kind regards Miroslav Lachman
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