> How can that be on a 2 OSD setup with double redundancy? > In this case, if all of a replicas smaller objects are > not on a single node, how will it recover from an OSD > failure? > > The only way I see this possible is if file foo is > split into small objects A1 A2 A3 A4 and replicas B1 > B2 B3 B4 and you spread those across 2 OSDs like this: > > replica 1 (A1 B2 A3 B4) > replica 2 (B1 A2 B3 A4) The image is striped over objects, _then_ the objects are replicated across OSDs. Objects themselves aren't striped. For example, if an image is striped over objects A B C D E F, each 4MB, you might end up with osd0: A B' C D E' F' osd1: A' B C' D' E F where A is the primary copy, A' is the replica, etc. sage -- 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
