Hi cephers, All our cluster osds are deployed in armhf. Could someone say something about what is the rational performance rates for librbd VS KRBD ? Or rational performance loss range when we use librbd compare to KRBD. I googled a lot, but I could not find a solid criterion. In fact , it confused me for a long time. About our tests: In a small cluster(12 osds), 4m seq write performance for Librbd VS KRBD is about 0.89 : 1 (177MB/s : 198MB/s ). In a big cluster (72 osds), 4m seq write performance for Librbd VS KRBD is about 0.38: 1 (420MB/s : 1080MB/s). We expect even increase osd numbers, Librbd performance can keep being close to KRBD. PS: Librbd performance are tested both in fio rbd engine & iscsi (tcmu+librbd). Thanks. _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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