File vanished
When launching two concurrent rsync, if the second one (which delete source files) end first, then the second one will have error (has file as vanished)
Solution :
- check if rsync command with the same folder is already existing.
using thread, we can reference them with input/output if the remove-sources is launch wait for the other thread to be ended.
- data watch sync can be launched with --ignore error option in the way it is not his job to do the copy but the job of data transfert.