Aiven for ClickHouse® 26.3 is generally available

Aiven for ClickHouse® 26.3, a long-term support (LTS) release, is now generally available. You can select version 26.3 when you create a service or upgrade an existing service from version 25.8.

Version 25.8 remains the default for new services, and existing services are not upgraded automatically. If your service runs version 25.3, upgrade to version 25.8 before upgrading to version 26.3. Direct upgrades from version 25.3 to 26.3 and downgrades are not supported.

Before upgrading, review the compatibility changes, removed features, and changed defaults. Test the upgrade on a fork of your service.

For more information, see Upgrade to Aiven for ClickHouse 26.3 and Manage versions in Aiven for ClickHouse.