Good scripting examples though in my opinion they left out the most fault tolerant option and that is using the "lftp" client [1] which happens to also speak SF

Good scripting examples though in my opinion they left out the most fault tolerant option and that is using the "lftp" client [1] which happens to also speak SFTP and can mimic the behavior of rsync in a chroot sftp-only environment. One of the mirror sub-system options is "--loop" which can repeat the job until there are no differences based on the commands invoked. lftp's mirror subsystem can also spawn multiple TCP connections for a batch of files or even splitting up one large file into multiple streams, thus working around round-trip-time latency. The downside of lftp's mirror subsystem is that directory enumeration is slower than rsync as there is no corresponding daemon on the other end to assist with the local aspect of remote enumeration. It is just using SFTP commands to do all the work. [1] - https://linux.die.net/man/1/lftp https://linux.die.net/man/1/lftp