Bigtable (paper) conceptpaper
Chang et al.
Chang et al. (Google), 2006. The wide-column store underneath much of Google's product infrastructure. Sparse, distributed, persistent multi-dimensional sorted map. Strong influence on HBase, Cassandra (which combines Bigtable's data model with Dynamo's replication), Accumulo. The paper that made 'wide-column' a category — the data model is the lesson, more than the implementation.