Date: Fri, 2 Oct 2015 14:46:50 +0200 From: Willem Jan Withagen <wjw@digiware.nl> To: Tom Curry <thomasrcurry@gmail.com> Cc: "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org> Subject: Re: ZFS, Zvol, iSCSI and windows and mostly readonly Message-ID: <560E7CBA.7080807@digiware.nl> In-Reply-To: <5606EBEA.2090103@digiware.nl> References: <56050EFC.1000303@digiware.nl> <1443179614.5271.42.camel@data-b104.adm.slu.se> <CAGtEZUD-e-9uH1H3hzL2Twj%2BvpMQJtw0neQ4TtQTJK392EKUJw@mail.gmail.com> <5606EBEA.2090103@digiware.nl>
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On 26-9-2015 21:03, Willem Jan Withagen wrote: > On 25-9-2015 16:05, Tom Curry wrote: >> On Fri, Sep 25, 2015 at 7:13 AM, Karli Sjöberg <karli.sjoberg@slu.se >> <mailto:karli.sjoberg@slu.se>> wrote: >> >> fre 2015-09-25 klockan 11:08 +0200 skrev Willem Jan Withagen: >> > Hi, >> > >> > Because of the Network Video Recorder (on windows) we use only likes >> > "real" disks, and not SMB disks. We started using ZVOLs which are >> > exported thru iSCSI/ctld.... >> > >> > And that works really well, so there all thumbs up for this combo. Since this data is mainly write-only, and only to be read when old data needs to be reviewed. Which is hardly ever.... Do I, can I do, or should I do, something about that data going into ARC or cache? zfsraid/nvr primarycache all default zfsraid/nvr secondarycache all default With that I mean it only needs to go to disk, until it is deleted about 30 days later, in the time in between the data is not accessed. Now I have the idea that it goes into ARC and puts presure on memory that could be used for other things? --WjW
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