I think that depend how much random writes io you have and acceptable latency you need. (As the purpose of the journal is to take random io then flush them sequentially to slow storage). Maybe some slower ssd will fill your needs. (just be carefull of performance degradation in time, trim,....) ----- Mail original ----- De: "Stefan Priebe" <s.priebe@xxxxxxxxxxxx> À: "Alexandre DERUMIER" <aderumier@xxxxxxxxx> Cc: ceph-devel@xxxxxxxxxxxxxxx, "Gregory Farnum" <greg@xxxxxxxxxxx> Envoyé: Dimanche 20 Mai 2012 09:56:21 Objet: Re: Designing a cluster guide Am 19.05.2012 18:15, schrieb Alexandre DERUMIER: > Hi, > > For your journal , if you have money, you can use > > stec zeusram ssd drive. (around 2000€ /8GB / 100000 iops read/write with 4k block). > I'm using them with zfs san, they rocks for journal. > http://www.stec-inc.com/product/zeusram.php > > another interessesting product is ddrdrive > http://www.ddrdrive.com/ Great products but really expensive. The question is do we really need this in case of rbd block device. Stefan -- -- Alexandre D erumier Ingénieur Système Fixe : 03 20 68 88 90 Fax : 03 20 68 90 81 45 Bvd du Général Leclerc 59100 Roubaix - France 12 rue Marivaux 75002 Paris - France -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
