Good point. True round trips is a huge cost.
This could be fixed with a recursive ls -alsr on filezilla server and winscp, but that
would be a non-standard command. This way the whole file structure could be compressed
and sent in one go.
However, most files we noticed that were being sync'd were html, sql, csv and mssql bak
Uncompressed it was trying to transfer 4GB every 6 hours. The CSV, SQL and MSSQL bakups
are normally over 1GB. Compressed it was less than 500k. That's over 16GB vs 2GB over a
day from one country to another.
This does result in a huge speed up.
Ofcourse scripts could be written to post and pre compress, but this becomes complex, with
timing and all that unless we used a sshd server, and results in many processes and many
possible points of failures.