An interesting observation that I can't seem to "un-observe" is that Megastore is actually a lot more like MongoDB than one would expect.
Both ostensibly work best when the application fits a hierarchical data model (entity groups vs. documents), and provide out-of-the-box strongly-consistent transactions for a single entity group. MongoDB feels like schemaless Megastore.
Both ostensibly work best when the application fits a hierarchical data model (entity groups vs. documents), and provide out-of-the-box strongly-consistent transactions for a single entity group. MongoDB feels like schemaless Megastore.