Regarding (1), yes a COW file system will (generally) behave "worse" that a non COW file system when space is limited. But, this is a design choice that makes s

Regarding (1), yes a COW file system will (generally) behave "worse" that a non COW file system when space is limited. But, this is a design choice that makes sense for many use cases. Just to point out a few: * Snapshots are virtually free. * Writes are sequential. * "Harder" to destroy existing data (block are not overwritten in place) These design decisions are not made light heartedly.