ClickHouse® versioning policy
ClickHouse® employs the frequent release policy. Managed Service for ClickHouse® offers a limited set of ClickHouse® versions: 24.8 LTS, 25.3 LTS, 25.8 LTS, 25.9, or 25.10. The list of versions is continuously updated. If the ClickHouse® version used in a Managed Service for ClickHouse® cluster becomes deprecated, it gets updated.
Upgrading to current versions allows you to get new features, patches, and security fixes, which improves the overall stability of the cluster.
Each ClickHouse® version supported by Managed Service for ClickHouse® undergoes comprehensive testing.
Upgrading to a new supported version of ClickHouse® does not affect data integrity and access.
Versioning policy
Managed Service for ClickHouse® uses two types of ClickHouse® versions:
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LTS (Long-Term Support) versions.
LTS versions are supported for 12 months, with new versions released every 6 months.
Two LTS versions are supported at the same time: the current one and the previous one.
When a new LTS version is released in Managed Service for ClickHouse®, the oldest available one becomes obsolete.
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Interim versions.
The three latest ClickHouse® versions, including interim ones, are supported. If one of these versions is an LTS version, only two interim versions are supported.
When a new interim ClickHouse® version is released in Managed Service for ClickHouse®, the oldest interim one becomes obsolete.
You can manually update the cluster version to one of the supported versions.
Warning
- For clusters with an obsolete ClickHouse® version, there is no option to create new hosts or restore from backups.
- Clusters running on an obsolete ClickHouse® version will be automatically updated according to the update policy.
Update policy
A Managed Service for ClickHouse® cluster running on an obsolete version of ClickHouse® will be updated to the next LTS version.
Warning
Users get notifications about the scheduled update of clusters using an obsolete LTS version two months and one week prior to the update.
A Managed Service for ClickHouse® cluster running on an obsolete ClickHouse® version will be upgraded to either the nearest LTS version, if available, or the latest interim version.
Warning
- Users get notifications about the scheduled update of clusters using an obsolete interim version one week prior to the update.
- If you upgrade to an LTS version, the appropriate update policy will apply to the cluster.
ClickHouse® is a registered trademark of ClickHouse, Inc.