I have implemented a new property for ZFS, "refratio", which is the compression ratio for referenced space (the "compressratio" is the ratio for used space). We are using this here at Delphix to figure out how much space a filesystem would use if it was not compressed (ignoring snapshots). I'd like to integrate this into Illumos. The changes have been reviewed by Delphix folks but it would be nice to get another set of eyes on these 37 lines changed.
webrev: http://dev1.illumos.org/~eschrock/cr/zfs-refratio/ bug report: https://www.illumos.org/issues/1092 Thanks! --matt
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