Rsync has command line arguments for compression:
-z, --compress compress file data during the transfer
--compress-level=NUM explicitly set compression level
What does --compress-level mean? Which numbers can be used as level?
Best Answer
it's values between 0-9. Where 1 is fastest 9 is most compressed. Other than that there's correlation between rsync and zlib where about rsync tells the zlib library to "use the default compression", in zlib's docs, it says this:
Z_DEFAULT_COMPRESSION requests a default compromise between speed and compression (currently equivalent to level 6).