I recommend Backuppc for these requirements. Pooling, no sw install required, uses rsync and dedupes across clients and uses client side hashing to avoid sendi

I recommend Backuppc for these requirements. Pooling, no sw install required, uses rsync and dedupes across clients and uses client side hashing to avoid sending files already in the pool. https://backuppc.github.io/backuppc/index.html https://backuppc.github.io/backuppc/index.html