Date: Mon, 10 Mar 2014 14:36:41 +0000 From: krad <kraduk@gmail.com> To: Albert Shih <Albert.Shih@obspm.fr> Cc: FreeBSD FS <freebsd-fs@freebsd.org> Subject: Re: ZFS & Dedup & SSD. Message-ID: <CALfReydpj2NE1nP--Pov8OZNeThxvgvBvK6HGySz9of6XiMKJQ@mail.gmail.com> In-Reply-To: <20140310140343.GA22517@pcjas.obspm.fr> References: <20140310140343.GA22517@pcjas.obspm.fr>
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you dont use the ssd for dedup, more you use it as an l2arc device. Hopefully the full dedup table is stored in the cache. Alternatively just but LOTS of ram in you machine. In my experience dedup is very expensive, and unless the ratio is very high its cheaper and simpler just to buy the extra storage. Often you can get the benefits of dedup, without actually using is though. eg clone a zfs fs rather than clone at the vm level for instance. Thing will diverge over time of course, but it can give you a lot of what u need. On 10 March 2014 14:03, Albert Shih <Albert.Shih@obspm.fr> wrote: > Hi all, > > If I use a ssd for dedup, what's happen if I loose the content of the ssd= . > > Can I get the data event without the ssd ? > > I ask that because SSD is expensive so make raid on SSD is more expensive= . > So I like to use just one SSD for the dedup. > > Regards. > > JAS > > > -- > Albert SHIH > DIO b=E2timent 15 > Observatoire de Paris > 5 Place Jules Janssen > 92195 Meudon Cedex > France > T=E9l=E9phone : +33 1 45 07 76 26/+33 6 86 69 95 71 > xmpp: jas@obspm.fr > Heure local/Local time: > lun 10 mar 2014 15:02:05 CET > _______________________________________________ > freebsd-fs@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" >
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