The graph seemed to be of estimated development years. If you accumulate an in place FS, dm, mdraid, LVM and all assorted userland tools I think that ZFS is pr

The graph seemed to be of estimated development years. If you accumulate an in place FS, dm, mdraid, LVM and all assorted userland tools I think that ZFS is probably less code complexity. There is some ideological complexity, namely the ARC (in implementation, not in algorithm) is a pretty big wart. It works well when properly dressed, but it is pretty hard to make work well with most OS kernel allocators and memory pressure.