Release History

This page documents Queen MQ server releases and their compatible client versions.

Version Compatibility Matrix

Server Version	Description	Compatible Clients
0.12.x	New frontend and docs	JS ≥0.7.4, Python ≥0.7.4, 0.12.0 if needs to use proxy auth
0.11.x	Libqueen 0.11.0; added stats tables and optimized analytics procedures, added DB statement timeout and stats reconcile interval	JS ≥0.7.4, Python ≥0.7.4
0.10.x	Total rewrite of the engine with libuv and stored procedures, removed streaming engine	JS ≥0.7.4, Python ≥0.7.4
0.8.x	Added Shared Cache with UDP sync for clustered deployment	JS ≥0.7.4, Python ≥0.7.4
0.7.5	First stable release	JS ≥0.7.4, Python ≥0.7.4

Release Details

Version 0.12.0

Highlights:

• New frontend and docs, new stats and fixed some issues

Version 0.11.0

Highlights:

• Libqueen 0.11.0; added stats tables and optimized analytics procedures, added DB statement timeout and stats reconcile interval

Compatible Clients:

• JavaScript Client: queen-mq ≥0.7.4
• Python Client: queen-mq ≥0.7.4

Version 0.10.0

Highlights:

• Total rewrite of the engine with libuv and stored procedures, removed streaming engine

Compatible Clients:

• JavaScript Client: queen-mq ≥0.7.4
• Python Client: queen-mq ≥0.7.4

Version 0.8.0

Highlights:

• Added Shared Cache with UDP sync for clustered deployment
• Enables multi-server deployments to share state efficiently
• Reduces database queries by 80-90% in clustered environments

Compatible Clients:

• JavaScript Client: queen-mq ≥0.7.4
• Python Client: queen-mq ≥0.7.4

Version 0.7.5

Highlights:

• First stable release of Queen MQ
• Full feature set including partitions, consumer groups, transactions, and streaming
• Production-ready with comprehensive testing

Compatible Clients:

• JavaScript Client: queen-mq ≥0.7.4
• Python Client: queen-mq ≥0.7.4

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Client Installation

Install the latest compatible clients:

JavaScript:

npm install queen-mq

Python:

pip install queen-mq