Hi, I'm currently trying to understand how to setup correctly a pool with erasure code https://ceph.com/docs/v0.80/dev/osd_internals/erasure_coding/developer_notes/ My cluster is 3 nodes with 6 osd for each node (18 osd total). I want to be able to survive of 2 disk failures, but also a full node failure. What is the best setup for this ? Does I need M=2 or M=6 ? Also, how to determinate the best chunk number ? for example, K = 4 , M=2 K = 8 , M=2 K = 16 , M=2 you can loose which each config 2 osd, but the more data chunks you have, the less space is used by coding chunks right ? Does the number of chunk have performance impact ? (read/write ?) Regards, Alexandre _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
 |