iozone compressed ZFS test

[David Abrahams]

OK, enclosed are the results I got from iozone with compression=gzip and
the default settings. I also enclosed the messages for Don Capps
describing what iozone writes and how to control compressability. I
don't have time to design a testing regime, but if anyone here wants to
decode what Don wrote and request a specific set of command-line
arguments to iozone, I'll be happy to oblige.

Cheers,
Dave

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