-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 If you are using the default rule set (which I think has min_size 2), you can sustain 1-4 disk failures or one host failures. The reason disk failures vary so wildly is that you can lose all the disks in host. You can lose up to another 4 disks (in the same host) or 1 host without data loss, but I/O will block until Ceph can replicate at least one more copy (assuming the min_size 2 stated above). - ---------------- Robert LeBlanc GPG Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 On Tue, Jun 9, 2015 at 9:53 AM, kevin parrikar wrote: > I have 4 node cluster each with 5 disks (4 OSD and 1 Operating system also > hosting 3 monitoring process) with default replica 3. > > Total OSD disks : 16 > Total Nodes : 4 > > How can i calculate the > > Maximum number of disk failures my cluster can handle with out any impact > on current data and new writes. > Maximum number of node failures my cluster can handle with out any impact > on current data and new writes. > > Thanks for any help > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > -----BEGIN PGP SIGNATURE----- Version: Mailvelope v0.13.1 Comment: https://www.mailvelope.com wsFcBAEBCAAQBQJVdxBACRDmVDuy+mK58QAAfIoQAK0ozApTIkk1dzAdONyX vJ7r6q4LRQF9OAzA2qRKZdLL9R7bk2i5+VRJ8+Xst/jV9F4jEp+Owy+bZ5JL F6C3/5tH8fco1enVsYJlivFhOUZij2RpUupFViWe5rDmq0EPwZC3cmFYlA2n UYtzDqAvOWeNQTUYlE7Ya4+prZexLFofz+N3+k8XylEI0w4++6iR8znxGSfE jtyXW/zzlZiLO1LZ4vbDviWRk7SRmE5dJV6Tc5HUEmkAB7lgkVJriBpHHY3V vIs5J5xXB+VH09Y+Ka4E/okyKt/tVd36NMvWz2v9xluOXFb1iLK9yQMyHeqr JbynllpM5E8JdBTvQq8eW2khZ2q2NaIugoBvhGWGQluoQz0WN82EdevY137a qR4j2xpHaG0oMwuWgMtUzpg0HcSccs+UQKVzkFCLXBlNnW4m/W63EfZMmh2B nusQ0LGVoB4EjFTGE5wHabOqUOdkaPCM/pSh9UTw6COXc8ytTbK4FCS3msiO BvmSYWoQFINfz6bOR2mpud1fB1k+nvEheECC3wZzbEo1w5bMx6lOdLt0kIe4 hJzR7o4TcfNoR/N3CGlfN6d+pk8yxoxVvcIiGTf3uRZZep+t8w6kyrA5XxlR orvhDwdVOkGVQL8jYGzelWk+Er9ILvHUsL4Semx4PEv8xAR9Dx//UHzyrviQ YJsn =B31a -----END PGP SIGNATURE----- _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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