system/duperemove: Added (Find duplicate extents).

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

1 files changed, 20 insertions, 0 deletions

diff --git a/system/duperemove/README b/system/duperemove/README
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+Duperemove is a simple tool for finding duplicated extents and
+submitting them for deduplication. When given a list of files it will
+hash their contents on a block by block basis and compare those hashes
+to each other, finding and categorizing blocks that match each other.
+When given the -d option, duperemove will submit those extents for
+deduplication using the Linux kernel extent-same ioctl.
+
+Duperemove can store the hashes it computes in a 'hashfile'. If given an
+existing hashfile, duperemove will only compute hashes for those files
+which have changed since the last run. Thus you can run duperemove
+repeatedly on your data as it changes, without having to re-checksum
+unchanged data.
+
+Duperemove can also take input from the fdupes program.
+
+Deduplication is currently only supported by the btrfs and xfs
+filesystems.
+
+fdupes is an optional runtime dependency (allows the use of the --fdupes
+command line option).