Hello, I have a cluster, which have this configuration: osd pool default size = 3 osd pool default min size = 1 I have 5 monitor nodes and 7 OSD nodes. I have changed a crush map to divide ceph cluster to two datacenters - in the first one will be a part of cluster with 2 copies of data and in the second one will be part of cluster with one copy - only emergency. I still have this cluster in one This cluster have a 1 PiB of raw data capacity, thus it is very expensive add a further 300TB capacity to have 2+2 data redundancy. Will it works? If I turn off the 1/3 location, will it be operational? I believe, it is a better choose, it will. And what if "die" 2/3 location? On this cluster is pool with cephfs - this is a main part of CEPH. Many thanks for your notices. Sincerely Jan Marek -- Ing. Jan Marek University of South Bohemia Academic Computer Centre Phone: +420389032080 http://www.gnu.org/philosophy/no-word-attachments.cs.html
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