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This creates an archive that does the following:
(Everyone seems to like -z, but it is much slower for me)
-a: archive mode - rescursive, preserves owner, preserves permissions, preserves modification times, preserves group, copies symlinks as symlinks, preserves device files.
-H: preserves hard-links
-A: preserves ACLs
-X: preserves extended attributes
-x: don't cross file-system boundaries
-v: increase verbosity
--numeric-ds: don't map uid/gid values by user/group name
--delete: delete extraneous files from dest dirs (differential clean-up during sync)
--progress: show progress during transfer
-T: turn off pseudo-tty to decrease cpu load on destination.
-c arcfour: use the weakest but fastest SSH encryption. Must specify "Ciphers arcfour" in sshd_config on destination.
-o Compression=no: Turn off SSH compression.
-x: turn off X forwarding if it is on by default.
Flip: rsync -aHAXxv --numeric-ids --delete --progress -e "ssh -T -c arcfour -o Compression=no -x" [source_dir] [dest_host:/dest_dir]
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