http://utcc.utoronto.ca/~cks/space/blog/solaris/ZFSHowMetadataUpdates
http://utcc.utoronto.ca/~cks/space/blog/solaris/ZFSRewriteDesire
http://utcc.utoronto.ca/~cks/space/blog/solaris/ZFSUberblockWrites
http://www.osdevcon.org/2009/slides/zfs_internals_uli_graef.pdf
https://blogs.oracle.com/ahrens/entry/is_it_magic
https://blogs.oracle.com/bill/entry/ditto_blocks_the_amazing_tape
https://blogs.oracle.com/bill/entry/zfs_vs_the_benchmark
https://blogs.oracle.com/bonwick/en_US/entry/rampant_layering_violation
https://blogs.oracle.com/bonwick/en_US/entry/space_maps
https://blogs.oracle.com/bonwick/entry/raid_z
https://blogs.oracle.com/bonwick/entry/seek_hole_and_seek_data
https://blogs.oracle.com/bonwick/entry/smokin_mirrors
https://blogs.oracle.com/bonwick/entry/zfs_block_allocation
https://blogs.oracle.com/bonwick/entry/zfs_end_to_end_data
https://blogs.oracle.com/eschrock/entry/behind_the_scenes_of_zpool
https://blogs.oracle.com/perrin/entry/slog_blog_or_blogging_on