Karan Bhutani developed a durability-focused enhancement for the apache/celeborn repository, introducing an optional fsync mechanism for shuffle data commits. By adding a new configuration key and integrating FileChannel.force within the Scala backend, Karan enabled operators to reduce data loss risk during OS crashes and improve shuffle reliability. The implementation included comprehensive unit and end-to-end tests to validate durability under various scenarios, reflecting a disciplined approach to test-driven development and configuration management. This work deepened Celeborn’s data durability guarantees and provided operators with greater control over transactional semantics, demonstrating Karan’s expertise in Scala, backend engineering, and robust data handling.