Consequence of maintaining hundreds of clones of a single RBD image snapshot

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Hello,

My use-case involves creating hundreds of clones (~1,000) of a single RBD
image snapshot.

I assume watchers exist for each clone, due to the copy-on-write nature of
clones.

Should I expect a penalty for maintaining such a large number of clones:
cpu, memory, performance?

If such penalty does exist, we might opt to flatten some of the clones. Is
consistency guaranteed during the flattening process? In other words, can I
write to a clone while it is being flattened?

Perspectivus
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