hi,all take a look at the link , http://www.ceph.com/docs/master/architecture/#smart-daemons-enable-hyperscale could you explain point 2, 3 in that picture. 1. at point 2,3, before primary writes data to next osd, where is the data? it is in momory or on disk already? 2. where is the code of point 2 or 3, at there primary distributes data to others? thanks -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.ceph.com/pipermail/ceph-users-ceph.com/attachments/20140923/a0a23982/attachment.htm>