US Patent 10157214 Process for data migration between document stores

A mechanism for migrating data from a database management system to a remote data store may maintain a row-level mapping of keys to locations, where the location comprises the original location or one of a plurality of destination partitions. Requests to read and write data may be redirected during migration and processed by storing the requested data in one of the destination partitions and updating the row-level mapping. Additional data may be migrated by a background process.