Better rsync options

[klappradla]

Come up with better (more thought through and better documented) options for rsync (and logging).

The current options are:

rsync -atvz --delete --exclude-from \
      $EXCLUDE_LIST \
      -e "ssh -T -c aes128-gcm@openssh.com -o compression=no -x"\
      "$dir" max@"$NAS":"$BACKUP_VOLUME"

Maybe the a flag already does everything I need 🤷‍♂️

-a, --archive
      This  is equivalent to -rlptgoD. It is a quick way of saying you want recursion
      and want to preserve almost everything (with -H being a notable omission).  The
      only  exception  to the above equivalence is when --files-from is specified, in
      which case -r is not implied.

      Note that -a does not preserve hardlinks, because finding multiply-linked files
      is  expensive.   You  must  separately specify -H.  Note also that for backward
      compatibility, -a currently does not imply the --fileflags option.

(rsync man page)

[klappradla]

Some links for the topic:

• https://galaxysd.github.io/20160302/Fastest-Way-Rsync
• https://superuser.com/questions/109780/how-to-speed-up-rsync
• https://gist.github.com/KartikTalwar/4393116
• http://www.yourownlinux.com/2015/04/speed-up-file-transfers-using-rsync-with-gnu-parallel.html (run in parallel)
• https://unix.stackexchange.com/questions/174674/rsync-a-list-of-directories-with-absolute-path-in-text-file (run a single command for multiple directories)
  • files-from probably makes most sense here 🤔