TDengine 3.2.1.0 Release Notes

About TDengine

TDengine is a time-series database purpose-built for Industry 4.0 and Industrial IoT. It enables real-time ingestion, storage, analysis, and distribution of petabytes of data per day, generated by billions of sensors and data collectors. With TDengine making big data accessible, valuable, and affordable, digital transformation has never been easier.

What’s New

• Timestamp conversion functions: You can now use the to_char function to convert ISO 8601 timestamps to VARCHAR data and the to_timestamp function to convert VARCHAR data to ISO 8601 timestamps. For details, see Conversion Functions.
• Improved performance of the LAST() function: The LAST() function now offers higher performance thanks to improved caching techniques.
• (TDengine Enterprise only) Support for views: You can create views to filter or share your time-series data. A view is a subset of data in a table on which you can perform queries or create subscriptions. For more information, see the TDengine Enterprise documentation.
• (TDengine Enterprise only) Incremental restoration of vnodes on tiered storage: In the event of a disk failure on a three-node cluster with tiered storage, the RESTORE DNODE command will perform an incremental restoration from another node. In previous versions, it was necessary to perform a full restoration.

Compatibility

• You can deploy TDengine Enterprise 3.2.1.0 on mainstream Linux distributions, macOS, and Windows.
• You can deploy TDengine OSS Server 3.2.1.0 on mainstream Linux distributions and macOS.
• You can deploy TDengine OSS Client 3.2.1.0 on mainstream Linux distributions, macOS, and Windows.

You can also run TDengine in Kubernetes or in Docker containers. See Supported Platforms for details about the compatibility of TDengine 3.2.1.0 with various architectures and operating systems.

Note: You must upgrade existing clients to TDengine 3.2.1.0 before connecting to a TDengine 3.2.1.0 server.

Upgrading to TDengine 3.2.1.0

Upgrading TDengine OSS

You can upgrade TDengine OSS to version 3.2.1.0 from version 3.0.1.5 or later.

To upgrade TDengine OSS, first back up your deployment by making a copy of the TDengine directory. After verifying that your deployment has been backed up, install TDengine 3.2.1.0 as described in the official documentation. It is not necessary to uninstall TDengine before upgrading.

Note: If you have deployed TDengine as a cluster, you must shut down and upgrade all nodes in the cluster to TDengine 3.2.1.0. Rolling upgrades are not supported in TDengine 3.2.1.0.

Upgrading TDengine Enterprise and TDengine Cloud

Contact your account representative for assistance in upgrading TDengine Enterprise or TDengine Cloud.

You can check your current version of TDengine at any time by running the SELECT SERVER_VERSION(); command.

Resolved Issues

For a full list of issues resolved in this release, see our GitHub repository.