Worked on the facebook/rocksdb repository over a two-month period, delivering two features focused on enhancing traceability and operational control within the storage stack. Developed end-to-end request ID propagation, enabling request tracking from the application layer through RocksDB to the filesystem, and introduced IODebugContext for improved read-path visibility and logging. Additionally, implemented user-controlled manual compaction cancellation by adding an atomic boolean to CompactionOptions, allowing cancellation of ongoing CompactFiles operations for better maintenance responsiveness. Leveraged C++ for development, with emphasis on debugging, file systems, and unit testing, and validated changes through targeted tests to ensure reliability and traceability.