Is it allowed for crush maps to have multiple hierarchies for different pools. So for example, I want one pool to treat my cluster as flat with every host being equal but the other pool to have a more hierarchical idea as hosts->racks->root?
Also, is it currently possible in ceph to have a custom placement of erasure coded chunks. So for example within a pool, I want objects to reside exactly on the OSDs I choose instead of doing placement for load balancing. Can I specify something like: "For object 1, I want systematic chunks on rack1 and non systematic distributed between rack2 and rack3 and then for object 2, I want systematic ones on rack2 and non systematic distributed between rack1 and rack3"? I would greatly appreciate any suggestions I get. Regards, Shayan Saeed
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