January 2026 monthly summary for facebookincubator/velox. Focused on delivering a configurable file rollover feature to improve write throughput and reduce throttling during large data writes, supported by a detailed PR (feat: Implement file rollover at configurable size limit). The change introduces a default config/session property to rotate writers and write smaller files when they exceed a limit (config threshold ~1GB) to mitigate hot blocks and throttling. Review and integration involved tanjialiang and spershin; differential Revision: D89820483. No explicit major bugs fixed this month; feature-centric delivery aimed at stabilizing large-file ingestion and improving concurrency performance.

Concise April 2025 monthly summary for prestodb/presto focusing on feature delivery, quality improvements, and business value.

March 2025 – IBM/velox: Delivered two high-impact items improving correctness and test coverage. Enhanced fuzz testing for fbCanonicalizePhoneNumber by adding a custom input generator to the phoneNumberGenerator, expanding randomness for phone numbers and related parameters (country code, format) to improve fuzzing coverage. Fixed boolean sorting in array_sort_desc by adjusting bit-filling logic; added regression test constant_desc_boolean to verify fix. These changes increase robustness of input handling and data processing, with measurable improvements in test coverage and reliability.