OceanBase is a distributed relational database. It stores data in log streams replicated with Paxos, supports MySQL and Oracle compatibility modes, and targets HTAP workloads on a shared cluster. MySQL and Oracle workloads can move to OceanBase when compatibility mode and migration tooling match your SQL.
OceanBase fits teams that need horizontal scale, built-in HA, and optional analytical queries on one cluster. Read log streams and Paxos before you size a cluster or plan a migration.
Practical example
A payment platform might run OLTP on MySQL-mode tenants while analytical summaries read from columnar replicas or resource-isolated HTAP paths. Migration typically uses OceanBase Migration Service (OMS) for incremental sync, then a planned cutover through OBProxy.
Limitations
OceanBase does not guarantee byte-for-byte MySQL or Oracle compatibility. Assess SQL, drivers, and operational tooling (OCP, OBD, OMS) against your target version before committing to a cutover date.