Tulip: Modernizing Meta’s data platform

What this post added

This post details the engineering challenges and solutions for migrating Meta's exabyte-scale data platform to the Tulip serialization format. It describes the motivation for replacing legacy formats (Hive Text Delimited, JSON) due to reliability and efficiency issues, and outlines the migration strategy. Key technical contributions include the development of a mixed-mode wire format to support gradual migration, data consumption readers and format converters to abstract serialization from application code, a CLI debugging tool (loggertail) for post-migration validation, shadow loggers for end-to-end acceptance testing, and mechanisms for rate limiting and partial rollouts to manage risk.