Ceph

There's no logic currently in place to disallow users from setting some variables on any pool regardless of the nature's pool.

Variables such as 'cache_target_dirty_ratio', 'cache_target_full_ratio', 'cache_mon_flush_age' and 'cache_min_evict_age' should be limited to those pools that actually need them. Same when getting their values.

There may be a few more, which I'm not currently aware of their purpose (e.g., 'target_max_bytes' and 'target_max_objects'), that may also fall under the subset of variables that are to be disallowed depending on the pool's nature.