The document discusses an auto migration framework developed by the Data Service & Solution team at eBay to migrate 90% of their batch workload from ADBMS to Apache Spark. The framework includes components like a migration planner, metadata store, SQL converter, job optimizer, and pipeline generator. It aims to migrate over 5,000 tables and 40PB of relational data over 1 year. Key challenges include collecting comprehensive metadata and validating data quality across platforms after migration. The team has also contributed over 50 issues to the Spark community to improve features around SQL parsing, filter pushdown, and data type handling during migration.