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The fastest remote directory rsync over ssh archival I can muster (40MB/s over 1gb NICs)

This creates an archive that does the following:

rsync (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

ssh

• 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.

Original

rsync -aHAXxv --numeric-ids --delete --progress -e "ssh -T -c arcfour -o Compression=no -x" user@<source>:<source_dir> <dest_dir>

Flip

rsync -aHAXxv --numeric-ids --delete --progress -e "ssh -T -c arcfour -o Compression=no -x" [source_dir] [dest_host:/dest_dir]