PolarDB

lastmod 2021-06-02created 2021-06-022 edits

Open source that turns Postgres into a share-nothing distributed DB

Features

• Open source that turns Postgres into a share-nothing distributed DB
  • Works through message passing without sharing data between nodes (Coordinator)
• Adds high performance/scalability/high availability/elasticity while keeping the SQL compatibility of the existing single node
• Paxos-based replication provides global data consistency, distributed SQL processing, data redundancy, and high availability
• Architecture
  • Shards tables by hashing the PK. The number of shards is adjustable
  • Each shard is replicated to 3 nodes
  • To cut costs, it can store 2 full copies and only the WAL (Write Ahead Log) on the third
• Open source from Alibaba

See also

• Postgresql

Favorite site

• Github - PolarDB