ClickHouse versioning policy
ClickHouse has a frequent release policy. In Managed Service for ClickHouse, a limited set of ClickHouse versions is available for use, and this set is continually maintained to ensure it is up to date. If the ClickHouse version used in a Managed Service for ClickHouse cluster becomes outdated, the cluster's version gets updated.
Updating to current versions allows you to get new functionality, patches, and security fixes, which improves the overall stability of the cluster.
Each ClickHouse version supported by Managed Service for ClickHouse undergoes comprehensive testing.
You can be confident that your data will remain safe and accessible after updating to a new supported version of ClickHouse.
Version support policy for
Managed Service for ClickHouse uses two types of ClickHouse versions:
LTS (versions with extended support period, Long-Term Support).
The LTS version support period is 1 year, with new versions released every 6 months.
Two LTS versions are supported: the current one and the previous one.
When a new LTS version is released in Managed Service for ClickHouse, the previous LTS version is deprecated. Users with clusters deployed on the current LTS version are notified that support for this version will be discontinued in 6 months.
The three latest interim ClickHouse versions that are not LTS versions are supported.
When a new interim version of ClickHouse is released in Managed Service for ClickHouse, the oldest of the three supported interim versions is deprecated.
You can manually change the cluster version to one of the supported versions.
- You can't create new hosts in clusters on a deprecated version of ClickHouse.
- Clusters on a deprecated version of ClickHouse are automatically updated according to the update policy.
A Managed Service for ClickHouse cluster on a deprecated version of ClickHouse is updated to the next LTS version.
Notifications about the scheduled update of clusters using a deprecated LTS version are sent to users 2 months, 1 month, and 1 week before the update.
A Managed Service for ClickHouse cluster on a deprecated ClickHouse version is updated to either an LTS version, if available, or the latest interim version.
- Notifications about the scheduled update of clusters using a deprecated interim version are sent to users 1 week before the update.
- If you upgrade to the LTS version, the corresponding update policy is applied to the cluster.