Am 09.01.2014 10:25, schrieb Bradley Kite: > 3 servers (quad-core CPU, 16GB RAM), each with 4 SATA 7.2K RPM disks (4TB) > plus a 160GB SSD. > [...] > By comparison, a 12-disk RAID5 iscsi SAN is doing ~4000 read iops and ~2000 > iops write (but with 15KRPM SAS disks). I think that comparing Ceph on 7.2k rpm SATA disks against iSCSI on 15k rpm SAS disks is not fair. The random access times of 15k SAS disks are hugely better compared to 7.2k SATA disks. What would be far more interesting is to compare Ceph against iSCSI with identical disks. Regards Christian -- Dipl.-Inf. Christian Kauhaus <>< · kc@xxxxxxxxxx · systems administration gocept gmbh & co. kg · Forsterstraße 29 · 06112 Halle (Saale) · Germany http://gocept.com · tel +49 345 219401-11 Python, Pyramid, Plone, Zope · consulting, development, hosting, operations _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
 |