In April 2025, AndreMouche contributed to the pingcap/tidb-engine-ext repository by optimizing the Raftstore compaction process. He adjusted the compaction order to process the write column family before the default column family, specifically targeting workloads with frequent deletions. This approach leveraged Rust and deep knowledge of database internals and distributed systems, integrating closely with RocksDB’s compaction-filter mechanism. By prioritizing the write column family, AndreMouche reduced unnecessary I/O and improved write-path efficiency, enhancing both reliability and maintainability of the compaction pipeline. The work demonstrated thoughtful performance optimization and a strong grasp of column family semantics within a complex distributed database environment.