- Several rural schools
- Every school:
- One linux server
- Limited bandwidth (shared with all school PCs)
- Electricity not guaranteed (last to leave the school could cut all electricity)
- Geographically disperse
I have to backup all school linux servers to a central server.
Method of backup chosen:
rsync (minimizes bandwidth usage)
Problem: Backup could degrade the network
First approximation: Using
--bwlimit=RATE parameter that limits socket I/O bandwidth. But it's a fixed amount, don't take advantage free network time and stands in the way in crowded network time.
Question: Any way to make rsync to use only spare bandwidth? maybe mark its traffic as low priority somehow?