HI all, Recently I was playing with crushmaps. I would like to know the difference between step choose and step chooseleaf. when I used : ruleset rule1{ ... step take default step choose firstn 0 host step emit } And I tested above using crushtool, it returned ids of bucket host. But when I used it in cluster, it chose osds. If this works to get devices, then why we need chooseleaf. Regards Sahana. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.ceph.com/pipermail/ceph-users-ceph.com/attachments/20140527/02f79836/attachment.htm>