Recap of the Open Source Salon: Latest Developments in Open Source Databases and Streaming Processing

On August 4, 2018, Didi Open Source and the Open Source Database Forum (ODF) co‑hosted an offline salon titled “Latest Developments in Open Source Databases” at the Dawn Building.

The event featured five speakers from well‑known internet companies who shared practical experiences and technical insights.

Redis Multi‑Data‑Center Support – Senior expert engineer Qi Nan from Didi’s infrastructure department presented Redis multi‑active deployment at Didi, using analogies from “Tian Long Ba Bu”, and discussed future directions and current focus.

MySQL InnoDB Cluster – Oracle technical consultant manager Du Xiuwen explained the vision and goals of InnoDB Clusters, covering functionality, use cases, architecture, plugins, Group Replication, configuration, monitoring, and operational considerations.

Streaming Processing Practice – Senior architect Zhao Ping from Yixin Technology R&D Center described the end‑to‑end streaming processing workflow, platform design concepts, key technologies such as WORMHOLE design specifications (NAMESPACE, UMS, FLOW, SQL), and performance optimizations for directives, time alignment, heterogeneous parallel processing, idempotent sinks, and lookup.

PostFIS in TianTian – PostgreSQL DBA Feng Ruohang shared three aspects: GIS requirements in the Internet, how PostGIS solves them, and why PostGIS was chosen, illustrated with real‑world GIS development anecdotes.

Redis 5.0 New Features – Zhang Donghong, co‑founder of China Redis User Group, introduced Redis 5.0’s new features, use cases, performance, drawbacks, and demonstrated the Stream data structure with case studies.

The salon also included a Q&A session, a lucky‑draw prize of the book “PostgreSQL in Practice” by Zhang Wensheng, and a group photo.

Didi’s open‑source initiative has released eight projects by August 2018, accumulating over 10,000 stars and receiving positive community feedback.