I'd be interested in CRUSH algorithm simplified in series of pictures. How does a storage node write and client read, and how do they calculate what they're after? What gets where/Where is it found/Why?
I suggest over-simplified storage system of e.g. 1 monitor, 4 storage nodes, 2 OSDs/node, 3 PGs/OSD, 2 pools? http://ceph.com/papers/weil-crush-sc06.pdf did not solve this for me.
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