On 08/22/2012 03:10 AM, Sage Weil wrote: > I pushed a branch that changes some of the crush terminology. Instead of > having a crush type called "pool" that requires you to say things like > "pool=default" in the "ceph osd crush set ..." command, it uses "root" > instead. That hopefully reinforces that it is a tree/hierarchy. > > There is also a patch that changes "bucket" to "node" throughout, since > bucket is a term also used by radosgw. > > Thoughts? I think the main pain in making this transition is that old > clusters have maps that have a type 'pool' and new ones won't, and the > docs will need to walk people through both...
"pool" in a crushmap being completely unrelated to a RADOS pool is something that I've heard customers/users report as confusing, as well. So changing that is probably a good thing. Naming it "root" is probably a good choice as well, as it happens to match http://ceph.com/wiki/Custom_data_placement_with_CRUSH. As for changing "bucket" to node... a "node" is normally simply a physical server (at least in HA terminology, which many potential Ceph users will be familiar with), and CRUSH uses "host" for that. So that's another recipe for confusion. How about using something super-generic, like "element" or "item"? Cheers, Florian -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
