actiontech/dble

Health v2 · maintenance only

Adoption not part of the score

1118 stars · 315 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

DBLE is a highly scalable database middleware for MySQL sharding, originally forked from MyCat and maintained by ActionTech. It speaks the MySQL protocol so applications can use it as a drop-in replacement for a single MySQL instance while transparently distributing data across sharded backends.

Use cases

• shard a large MySQL database across multiple nodes
• scale out MySQL horizontally as data grows beyond a single instance
• replace a single MySQL instance with a sharded setup without changing application code
• set up read-write splitting for MySQL
• run distributed transactions across sharded MySQL nodes with XA or two-phase commit
• deploy a highly available clustered MySQL proxy layer
• run complex SQL queries like joins and group by across sharded tables

When to choose

• you need MySQL-compatible sharding middleware with no application code changes
• you want read-write splitting and transparent data sharding for OLTP workloads
• you need distributed transactions (XA or two-phase commit) across shards
• you want battle-tested middleware used in banking and other high-reliability environments
• you prefer a Java-based, actively maintained fork of MyCat focused purely on MySQL

When to avoid

• you use databases other than MySQL, since dble dropped support for them
• you need a fully distributed SQL database rather than a proxy/middleware layer
• your dataset fits comfortably in a single MySQL instance and you don't need sharding
• you rely heavily on sub-queries or features still on dble's roadmap
• you want a cloud-managed sharding solution rather than self-hosted middleware

Facets

service · maturity active

database middleware routing rpc databases microservices backend developer-tools jvm self-hosted mysql-sharding database-proxy mysql-protocol read-write-splitting distributed-transactions two-phase-commit mycat-fork oltp linux web-server

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