2012/5/20 Stefan Priebe <s.priebe@xxxxxxxxxxxx>: > 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. I think it depends, what you are planning to do. I was calculating different storage type for our cloud solution lately. I think that there are three different types that make sense (at least for us): - Cheap Object Storage (S3): Many 3,5'' SATA Drives for the storage (probably in a RAID config) A small and cheap SSD for the journal - Basic Block Storage (RBD): Many 2,5'' SATA Drives for the storage (RAID10 and/or mutliple OSDs) Small MaxIOPS SSDs for each OSD journal - High performance Block Storage (RBD) Many large SATA SSDs for the storage (prbably in a RAID5 config) stec zeusram ssd drive for the journal Regards, Christian -- 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
