To back up Cassandra data, the standard approach is to make a copy of the data files that back it and store them somewhere safe. Netflix stores these files, known as SSTables, in Amazon’s S3 object store, which provides significant data durability guarantees. Netflix needs to report across all this data, but given the scale involved this is a nontrivial challenge. Its approach is to use Hadoop that uses SSTable backup as the source of its jobs.
Process backup files/stores to populate reporting db
