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This new algorithm adds support for wiping volumes using TRIM. It does not overwrite all the data in a volume, but it tells the backing storage pool/driver that all bytes in a volume can be discarded. It depends on the backing storage pool how this is handled. A SCSI backend might send UNMAP commands to remove all data present on a LUN. A Ceph backend might use rbd_discard() to instruct the Ceph cluster that all data on that RBD volume can be discarded. Signed-off-by: Wido den Hollander <wido@widodh.nl> |
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Makefile.am |