> Something that is not yet clear for me is how do we study the overlapping of different layers of reliability using the modelling tool. Is the idea to use erasure coding on top of another reliable layer like a RAID-based storage? If I understand correctly the current tool models disks, RAID, RADOS independently. But erasure coding is added on top of those layers, isn't it? You understand correctly in that the tool was originally written to analyze RADOS with replication and RAID, independently. Erasure coding can be used independently and I had considered the original scope to be modeling just that, a erasure coded pool in isolation. Being able to model durability of a tiered pool configuration would be an excellent next step, though. Good question! -- Kyle Bader - Inktank Senior Solution Architect -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
