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Illumos #1092: zfs refratio property
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 <[email protected]> Reviewed by: Adam Leventhal <[email protected]> Reviewed by: Dan McDonald <[email protected]> Reviewed by: Richard Elling <[email protected]> Reviewed by: Mark Musante <[email protected]> Reviewed by: Garrett D'Amore <[email protected]> Approved by: Garrett D'Amore <[email protected]> References to Illumos issue and patch: - https://www.illumos.org/issues/1092 - illumos/illumos-gate@187d6ac08a Signed-off-by: Brian Behlendorf <[email protected]> Issue #340
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