Otter is a distributed database synchronization system and change data capture tool designed to replicate data between databases across multiple geographic regions. It functions as a synchronization orchestrator and ETL data pipeline that mirrors records and associated files in real time.
The system employs incremental log parsing to capture database changes and utilizes a consistency-based convergence algorithm and loop-avoidance logic to manage bi-directional replication. It processes data through a pipeline of selection, extraction, transformation, and loading to handle joins and format conversions before delivering records to target tables.
The platform includes a distributed coordination layer to manage worker node state and schedule large-scale synchronization tasks across remote data centers. Supporting capabilities cover synchronization health monitoring for tracking replication lag and throughput, as well as administrative access control for managing system configurations.