DBLE
DBLE is Linux-based, self-hosted middleware for teams that need to scale or replace a single MySQL instance as business needs grow.
What DBLE is
DBLE is Linux-based, self-hosted middleware for teams that need to scale or replace a single MySQL instance as business needs grow. It uses the MySQL protocol and can stand in for MySQL in many cases without application code changes. Its sharding options include hash, modulo, time-based, range-based and custom algorithms, along with global and ER tables. DBLE supports SQL 92 and MySQL dialect features such as joins, unions, grouping, ordering and distinct queries, while some features are still on its roadmap. It can run in a cluster to reduce the impact of a single-node failure, and provides query routing, connection pooling, load balancing and automatic failover. Other listed capabilities include read/write separation, master-slave expansion, and query optimization for sharded and related tables and subqueries. Distributed transactions use two-phase commit, with normal and XA modes; XA depends on MySQL 5.7 XA transactions, backend availability and disk reliability. The GPL-2.0 open-source plan is free. Commercial support is available by contacting the maker.
Good
- MySQL protocol can avoid application changes in many cases
- Offers hash, modulo, time-based and range-based sharding
- Supports clustering and automatic failover
- Includes Explain plans and slow-query analysis reports
Watch out
- Self-hosted deployment requires Linux
- Some SQL features remain on the roadmap
- XA depends on backend availability and disk reliability
Who it suits
DBLE suits teams replacing or scaling a single MySQL instance that can operate Linux software in a self-hosted deployment. It may also fit teams that need sharding, SQL routing and distributed transactions.
Verdict
DBLE provides a broad set of MySQL scaling, routing and operational capabilities in a self-hosted package. Check its SQL roadmap and the XA dependencies against your requirements before choosing it.
Plans and prices
From DBLE's own pricing page, checked 4 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| DBLE (open-source version) | Free | GPL-2.0 licensed · enterprise support plans available |
The facts
Each one read from DBLE's own pages, with the date it was checked.
What it does
- High availability
- The DBLE server can run as a cluster so business workloads do not suffer from a single-node failure.checked 4 Oct 2026
- License and version
- The repository identifies DBLE as GPL-2.0 licensed and the documentation branch as applying to version 3.23.08.x.checked 4 Oct 2026
- MySQL compatibility
- DBLE uses the MySQL protocol and can replace MySQL in many cases without application code changes.checked 4 Oct 2026
- Operational tools
- The official site lists slow logs compatible with MySQL slow-log analysis tools, an Explain execution plan, and slow-query performance analysis reports.checked 4 Oct 2026
- Purpose
- DBLE is high-scalability middleware for MySQL sharding.checked 4 Oct 2026
- Query optimization
- It optimizes complex queries involving global-table joins, sharding tables, ER-relation tables, and subqueries.checked 4 Oct 2026
- Scaling and deployment
- The official site lists read/write separation, master-slave expansion, complete expansion plans, and ZooKeeper cluster deployment.checked 4 Oct 2026
- Security controls
- The official site lists password encryption, IP allowlists, and SQL denylists.checked 4 Oct 2026
- Sharding features
- The official site lists hash, modulo, time-based, and range-based sharding algorithms, plus global tables, ER tables, and custom sharding algorithms.checked 4 Oct 2026
- SQL support
- DBLE supports SQL 92 and MySQL dialect features, including group by, order by, distinct, joins, and unions; some features are listed on its roadmap.checked 4 Oct 2026
- Support
- The DBLE documentation lists community support resources and says commercial support is available by contacting the maker.checked 4 Oct 2026
- Transactions
- DBLE supports distributed transactions with two-phase commit and offers normal and XA modes; XA depends on MySQL 5.7 XA transactions and backend availability and disk reliability.checked 4 Oct 2026
- Who it is for
- DBLE is intended for teams replacing or scaling a single MySQL instance as business needs grow.checked 4 Oct 2026
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