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Comdb2 vs MySQL

Comdb2: Bloomberg's clustered relational database with optimistic concurrency and synchronous replication. MySQL: The web's default open-source SQL database, now on calendar versioning with 9.7 as the LTS line.

key differences

  • Licensing: Comdb2 is open source (permissive) (Apache License 2.0); MySQL is open source (copyleft) (GPL-2.0 (Community) / commercial (Enterprise)).
  • Horizontal scaling is manual in Comdb2 and addon in MySQL.
  • Only Comdb2 has pub/sub.
  • Only MySQL has full-text search, geospatial, encryption at rest.

choose comdb2 for

  • +Highly available financial OLTP systems
  • +Event delivery via database queues and triggers
  • +Clusters needing strong consistency across nodes

best at · OLTP, Queue, Tick data

choose mysql for

  • +Web applications and CMS backends (WordPress, Drupal, Magento)
  • +Read-heavy SaaS OLTP with replicas
  • +Sharded high-traffic systems via Vitess
  • +E-commerce catalogs and order systems

best at · OLTP, Content, Metadata

Comdb2Bloomberg's clustered relational database with optimistic concurrency and synchronous replication.
MySQLThe web's default open-source SQL database, now on calendar versioning with 9.7 as the LTS line.
overview
Primary model
Relational
Relational
Also supports
–
Document, Spatial
Type
Database engine
Database engine
Status
Active
Active
Developer
Bloomberg
Oracle Corporation
First release
2004
1995
Latest version
8.2.556 (Oct 24, 2026)
26.10.0 (Oct 20, 2026)
License
Open source (permissive)Apache License 2.0
Open source (copyleft)GPL-2.0 (Community) / commercial (Enterprise)
Free tier
✓
✓
popularity
WhichDB Score
10.9
82.3
Rank
#291
#3
GitHub stars
1.5K
12.5K
Stack Overflow questions
–
657K
scale & guarantees
Comfortable data size
Medium (≤ 10 TB)
Medium (≤ 10 TB)
Horizontal scaling
Manual
Addon
Multi-region
Read replicas
Read replicas
ACID
Full
Full
Consistency
Strong
Strong, Eventual
Schema
Strict
Strict
Architecture
Distributed, Multi primary, Client server
Single node, Primary replica, Multi primary, Client server
deployment
Self-hosted
✓
✓
Vendor-managed cloud
—
—
Serverless
—
—
Embedded
—
—
Edge
—
—
Clouds
–
AWS, Google Cloud, Azure, Oracle Cloud, Alibaba Cloud, DigitalOcean
capabilities
Transactions
✓
✓
Joins
✓
✓
Secondary indexes
✓
✓
Full-text search
—
✓
Vector search
—
—
Geospatial
—
✓
JSON
✓
✓
Change data capture
✓
✓
Triggers
✓
✓
Stored procedures
✓
✓
Materialized views
—
—
TTL / expiry
—
—
Pub/Sub
✓
—
Columnar storage
—
—
In-memory
—
—
Durable persistence
✓
✓
Compression
✓
✓
Encryption at rest
—
✓
Role-based access
✓
✓
Time travel
—
—
Branching
—
—
Online schema changes
✓
✓
Streaming ingest
—
—
Offline sync
—
—
Runs in WebAssembly
—
—
interfaces
Query languages
SQL, Lua
SQL
Client languages
C, Java, Go, Python, JavaScript
C, C++, Java, Python, JavaScript, Go, PHP, C#
Best for
OLTP, Queue, Tick data
OLTP, Content, Metadata, Geo
Add more to this comparisonNot sure either fits? Try smart match

Comdb2 vs MySQL: FAQ

What is the difference between Comdb2 and MySQL?

Comdb2: Bloomberg's clustered relational database with optimistic concurrency and synchronous replication. MySQL: The web's default open-source SQL database, now on calendar versioning with 9.7 as the LTS line. Licensing: Comdb2 is open source (permissive) (Apache License 2.0); MySQL is open source (copyleft) (GPL-2.0 (Community) / commercial (Enterprise)). Horizontal scaling is manual in Comdb2 and addon in MySQL. Only Comdb2 has pub/sub.

When should I choose Comdb2 over MySQL?

Choose Comdb2 for highly available financial OLTP systems; event delivery via database queues and triggers; and clusters needing strong consistency across nodes. Choose MySQL for web applications and CMS backends (WordPress, Drupal, Magento); read-heavy SaaS OLTP with replicas; and sharded high-traffic systems via Vitess.

Is Comdb2 or MySQL more popular?

MySQL ranks #3 on the WhichDB Score (82.3/100) and Comdb2 ranks #291 (10.9/100). Popularity is not fit: check the requirements that matter for your project.

Are Comdb2 and MySQL open source?

Yes. Comdb2 is open source. License: Apache License 2.0. Yes. MySQL is open source. License: GPL-2.0 (Community) / commercial (Enterprise).