I think the cleanest, most compelling backup strategies are those employed by RDBMS products. [A]sync log replication is really powerful at taking any arbitrary

I think the cleanest, most compelling backup strategies are those employed by RDBMS products. [A]sync log replication is really powerful at taking any arbitrary domain and making sure it exists in the other sites exactly. You might think this is unsuitable for your photo/music/etc. collection, but there's no technical reason you couldn't use the database as the primary storage mechanism. SQLite will take you to ~281 terabytes with a 64k page size. MSSQL supports something crazy like 500 petabytes. The blob data types will choke on your 8k avengers rip, but you could store it in 1 gig chunks - There are probably other benefits to this anyways.