r
root@nn-vm01:~# rdiff --help
Usage: rdiff [OPTIONS] signature [BASIS [SIGNATURE]]
[OPTIONS] delta SIGNATURE [NEWFILE [DELTA]]
[OPTIONS] patch BASIS [DELTA [NEWFILE]]
Options:
-v, --verbose Trace internal processing
-V, --version Show program version
-?, --help Show this help message
-s, --statistics Show performance statistics
Delta-encoding options:
-b, --block-size=BYTES Signature block size
-S, --sum-size=BYTES Set signature strength
--paranoia Verify all rolling checksums
IO options:
-I, --input-size=BYTES Input buffer size
-O, --output-size=BYTES Output buffer size
root@nn-vm01:~# rdiff signature /backup/sda.backup.last.raw | \
ssh backup-user@source "rdiff delta - /dev/sda" | \
rdiff patch /backup/sda.backup.last.raw - /backup/sda.backup.new.raw