OceanBase 2.0 Release: Technical Overview and Innovations

On September 21, Ant Financial’s OceanBase team announced the launch of OceanBase 2.0, a financial‑grade distributed relational database that has been in production for over eight years and has replaced Oracle in Alipay’s core services.

The release addresses three key challenges for technology decision‑makers: technical risk caused by differences between single‑node and distributed databases, migration cost and complexity, and the need for new product quality and service reliability.

OceanBase 2.0 introduces a peer‑node, shared‑nothing architecture with a Root Service for global management, multi‑replica data across three availability zones, and a “three‑site five‑center” high‑availability design that can survive city‑level failures with sub‑26‑second recovery.

Key technical innovations include:

Global Consistent Snapshot (GTS): a pure‑software global timestamp service that enables cross‑node consistent reads and causal ordering, handling over 2 million timestamp requests per second with less than 5 % performance impact.

Global Index: a cost‑based, fault‑tolerant global indexing mechanism that eliminates the need for application‑level workarounds and optimizes queries without partition keys.

Load‑Balancing: enriched strategies for intra‑tenant and inter‑tenant balancing, automatically adjusting based on CPU, memory, and storage metrics.

Data Availability Enhancements: real‑time index activation, flashback queries with multi‑version storage, and online partition splitting that supports seamless scaling.

Operability Improvements: DB Replay for safe upgrades and stress testing, online upgrade with gray‑scale rollout and rollback, and the OCP 2.0 cloud‑control platform for one‑click deployment, monitoring, and task management.

Cost‑Performance Boost: optimized two‑phase commit protocol, memory and data‑type optimizations, and data encoding that together deliver >50 % performance gains and 30 % storage reduction in OLTP workloads.

Compatibility Enhancements: dual compatibility modes (MySQL and Oracle) and the first native distributed database to support stored procedures, compiled with LLVM for high efficiency.

The new version will be stress‑tested during the upcoming Double‑Eleven shopping festival, where it is expected to handle a large portion of Alipay’s core transactions while maintaining zero additional hardware cost.

Overall, OceanBase 2.0 aims to reduce migration risk, improve system reliability, and provide a high‑performance, cost‑effective solution for financial‑grade distributed workloads.