Hello Chris,
> > My question is now, how often can a block in btrfs be refferenced?
> The exact answer depends on if we are referencing it from a single
> file or from multiple files. But either way it is roughly 2^32.
could you please explain to me what underlying datastructure is used to
monitor if the block is still referenced or already free? Is a counter
used, bitmap (but that can't be if is 2^32) or some sort of list? I
assume that a counter is used. If this is the case, I assume when a
snapshot for example is deleted the reference counter of every block
that was referenced in the snapshot will be decremented by one. Is this
correct or am I missing something here?
Thomas
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