KWDB 2.2.1 Release Notes
KWDB is a distributed, multi-model database, designed for AIoT scenarios. It seamlessly integrates time-series and relational databases within the same instance, enabling efficient multi-model data processing. With high-performance time-series capabilities, it supports connections for tens of millions of devices, real-time insertion of millions of records within seconds, and query responses in just a few seconds for hundreds of millions of records. Built for stability, security, high availability, and easy maintenance, KWDB is ideal for industrial IoT, digital energy, connected vehicles, and smart industries, providing a unified platform for data storage, management, and analysis.
KWDB 2.2.1 retains the core features of previous versions while introducing enhancements in tag index management and distributed high availability architecture.
Version Details
| Version | Release Date |
|---|---|
| 2.2.1 | 2025.06.13 |
New Features
DDL Operations
- Tag Index Management:
- Supports adding or removing indexes for one or multiple regular tags in a time-series table.
- Enables index queries, allowing users to view indexes for a specific table.
Distributed High Availability
- Multi-Replica Cluster: The system continues to support DDL, DML, and DQL operations under the following conditions:
- Node failures
- Node recovery
- Single-node upgrade
Upgrade Notes
KWDB 2.2.1 supports the following upgrade methods:
- Multi-replica clusters: online upgrade from 2.2.0.
- Single-replica clusters: offline upgrade from 2.2.0.
- Standalone deployments: offline upgrade from 2.2.0.
- KWDB 2.0.x and 2.1.0: data export and import.
For instructions, see Database Upgrade, Data Export, and Data Import.