As I understand it, in Ceph one can cluster storage nodes, but otherwise every node is essentially identical, so if three storage nodes have a file, ceph randomly uses one of them. This is not efficient use of network resources in a distributed data center. Or even in a multi-rack situation. I want to prefer accessing nodes which are "local". The client in rack A should prefer to read from the storage nodes that are also in rack A. Ditto for rack B. Ditto for s/rack/data center/. As far as I understand, the Ceph clients can't do that. (Nor can Ceph nodes among each other, but I care less about that, as most traffic is reading data.) I think this is an important feature for many high-reliability situations. What would be the next steps to get this feature, assuming I don't have time to implement it myself? Persistently annoy this mailing list that people need it? Offer to pay for implementing it? Shut up and look for some other solution -- which I already did, but I didn't find any that's as good as Ceph, otherwise? I've opened a feature request for this, half a year ago, which hasn't seen any comments yet: http://tracker.ceph.com/issues/3249 -- Matthias Urlichs -- 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
