Hi, If not use replication, Is it only to divide by nearfull_ratio? (does only radosgw support replication?) 10T/0.85 = 11.8 TB of each node? # ceph pg dump | egrep "full_ratio|nearfulll_ratio" full_ratio 0.95 nearfull_ratio 0.85 Sorry I?m not familiar with ceph architecture. Thanks for the reply. ? idzzy On August 22, 2014 at 3:53:21 PM, Irek Fasikhov (malmyzh at gmail.com) wrote: Hi. 10?B*2/0.85 ~= 24 TB?with two replications,?total volume for the raw data. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.ceph.com/pipermail/ceph-users-ceph.com/attachments/20140822/3090e13e/attachment.htm>