Date: Fri, 26 Aug 2016 14:28:52 +0200 From: Ben RUBSON <ben.rubson@gmail.com> To: FreeBSD FS <freebsd-fs@freebsd.org> Subject: Re: [ZFS] ARC accounting bug ? Message-ID: <91665D7B-D2EA-4A7F-BE8D-67BE238DAF6B@gmail.com> In-Reply-To: <c45b36de-b43f-6eae-4187-142f1e5c3e48@internetx.com> References: <C2642B73-83F2-4A1C-88BE-322F376861FF@gmail.com> <5B8C6663-5D21-4C03-AC69-CB7E70D3A6C2@gmail.com> <067ac0ed-1f2d-c9fb-de4d-ed5da62fe10c@internetx.com> <9EAAEEC5-0FFF-474D-9AD0-4447CD6B549B@gmail.com> <c45b36de-b43f-6eae-4187-142f1e5c3e48@internetx.com>
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Yes Juergen, metadata only stores in ARC files' info (location in pool = and some other useful info), not the user data. I think "find" only needs metadata, as it does not read the files' = content. Which can be "verified" because : - there is no IO at all on the pool (after the first find loop, once ARC = has the needed metadata) ; - there is no ARC demand data at all. But I may be wrong, so of course feel free to correct me. Thank you. Thank you for the links, I already read them before posting here, but I = may have missed something. Ben > On 26 Aug 2016, at 14:16, InterNetX - Juergen Gotteswinter = <juergen.gotteswinter@internetx.com> wrote: >=20 > so, you know the difference between >=20 > - metadata > - data >=20 > ? >=20 > if yes, what is your find actually doing in this case? >=20 > regarding arc >=20 > http://dtrace.org/blogs/brendan/2012/01/09/activity-of-the-zfs-arc/ > = https://www.patpro.net/blog/index.php/2014/03/19/2628-zfs-primarycache-all= -versus-metadata/ >=20 >=20 >=20 > Am 26.08.2016 um 14:06 schrieb Ben RUBSON: >> Juergen, thank you for your answer. >> So where do you think these ARC misses come from ? I can't find out = :S >> Thank you ! >>=20 >>> On 26 Aug 2016, at 14:01, InterNetX - Juergen Gotteswinter = <juergen.gotteswinter@internetx.com> wrote: >>>=20 >>> no bug, everything like i whould expect >>>=20 >>> Am 26.08.2016 um 11:40 schrieb Ben RUBSON: >>>> uname -v >>>> FreeBSD 11.0-RC2 #0 r304729: Wed Aug 24 06:59:03 UTC 2016 = root@releng2.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC >>>> _______________________________________________ >>>> freebsd-fs@freebsd.org mailing list >>>> https://lists.freebsd.org/mailman/listinfo/freebsd-fs >>>> To unsubscribe, send any mail to = "freebsd-fs-unsubscribe@freebsd.org" >>>>=20 >>=20 >> _______________________________________________ >> freebsd-fs@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-fs >> To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" >>=20
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