Hi, On 28.07.2015 12:02, Shneur Zalman Mattern wrote: > Hi! > > And so, in your math > I need to build size = osd, 30 replicas for my cluster of 120TB - to get my demans???? 30 replicas is the wrong math! Less replicas = more speed (because of less writing). More replicas less speed. Fore data safety an replica of 3 is recommended. Udo _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com