Date: Wed, 8 May 2019 12:04:39 -0500 From: Karl Denninger <karl@denninger.net> To: freebsd-stable@freebsd.org Subject: Re: ZFS... Message-ID: <4a3b65e1-f3a6-58cf-3de3-bdd11cf30b02@denninger.net> In-Reply-To: <CAOjFWZ4hb=Sixj4B6TScu6wWmcvXHs3_f7P38svwZKGP4ri3UQ@mail.gmail.com> 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> <26B407D8-3EED-47CA-81F6-A706CF424567@gromit.dlib.vt.edu> <42ba468a-2f87-453c-0c54-32edc98e83b8@sorbs.net> <4A485B46-1C3F-4EE0-8193-ADEB88F322E8@gromit.dlib.vt.edu> <14ed4197-7af7-f049-2834-1ae6aa3b2ae3@sorbs.net> <453BCBAC-A992-4E7D-B2F8-959B5C33510E@gromit.dlib.vt.edu> <92330c95-7348-c5a2-9c13-f4cbc99bc649@sorbs.net> <d9086e22-fa73-1b01-d455-c32e0be70783@denninger.net> <CAOjFWZ4hb=Sixj4B6TScu6wWmcvXHs3_f7P38svwZKGP4ri3UQ@mail.gmail.com>
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[-- Attachment #1 --]
On 5/8/2019 11:53, Freddie Cash wrote:
> On Wed, May 8, 2019 at 9:31 AM Karl Denninger <karl@denninger.net> wrote:
>
>> I have a system here with about the same amount of net storage on it as
>> you did. It runs scrubs regularly; none of them take more than 8 hours
>> on *any* of the pools. The SSD-based pool is of course *much* faster
>> but even the many-way RaidZ2 on spinning rust is an ~8 hour deal; it
>> kicks off automatically at 2:00 AM when the time comes but is complete
>> before noon. I run them on 14 day intervals.
>>
> .... (description elided)
That is a /lot /bigger pool than either Michelle or I are describing.
We're both in the ~20Tb of storage space area. You're running 5-10x
that in usable space in some of these pools and yet seeing ~2 day scrub
times on a couple of them (that is, the organization looks pretty
reasonable given the size and so is the scrub time), one that's ~5 days
and likely has some issues with parallelism and fragmentation, and then,
well, two awfuls which are both dedup-enabled.
--
Karl Denninger
karl@denninger.net <mailto:karl@denninger.net>
/The Market Ticker/
/[S/MIME encrypted email preferred]/
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