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Add a "REFRATIO" property, which is the compression ratio based on data referenced. For snapshots, this is the same as COMPRESSRATIO, but for filesystems/volumes, the COMPRESSRATIO is based on the data "USED" (ie, includes blocks in children, but not blocks shared with the origin). This is needed to figure out how much space a filesystem would use if it were not compressed (ignoring snapshots). Reviewed by: George Wilson <George.Wilson@delphix.com> Reviewed by: Adam Leventhal <Adam.Leventhal@delphix.com> Reviewed by: Dan McDonald <danmcd@nexenta.com> Reviewed by: Richard Elling <richard.elling@richardelling.com> Reviewed by: Mark Musante <Mark.Musante@oracle.com> Reviewed by: Garrett D'Amore <garrett@nexenta.com> Approved by: Garrett D'Amore <garrett@nexenta.com> References to Illumos issue and patch: - https://www.illumos.org/issues/1092 - https://github.com/illumos/illumos-gate/commit/187d6ac08a Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Issue #340 |
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