I posted a blueprint with an alternative approach to tiered storage than the redirects I mentioned yesterday. Instead of demoting data out of an existing pool to a colder pool, we could put a faster pool logically in front of an existing pool as a cache. Think SSD or fusionio or similar. I think it is logically simpler, but address slightly different use cases--it helps with hot data, but doesn't really address archival of cold data (e.g., to an erasure coded pool). http://wiki.ceph.com/01Planning/02Blueprints/Emperor/osd%3A_cache_pool_overlay We should discuss this in the same session with the redirects blueprint and the blueprint on temperature tracking (which I'm not seeing listed; maybe Sam hasn't posted it yet). -- 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
