ClickHouse® versioning policy
ClickHouse® employs the frequent release policy. Managed Service for ClickHouse® offers a limited set of ClickHouse® versions: 23.8 LTS, 24.3 LTS, 24.4 or 24.5. The list of versions is continuously updated. If the ClickHouse® version used in a Managed Service for ClickHouse® cluster becomes obsolete, it gets updated.
Updating 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.
After updating to a new supported version of ClickHouse®, your data remains safe and accessible.
Version support policy
Managed Service for ClickHouse® uses two types of ClickHouse® versions:
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LTS (Long-Term Support).
The LTS version support period is 12 months, 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 oldest available one stops being supported.
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Interim.
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 version stops being supported.
You can manually change the cluster version to one of the supported versions.
Warning
- You cannot create new hosts in clusters on a deprecated version of ClickHouse®.
- Clusters based on a deprecated ClickHouse® version are automatically updated according to the update policy.
Update policy
A Managed Service for ClickHouse® cluster on a deprecated version of ClickHouse® is updated to the next LTS version.
Warning
Notifications about the scheduled update of clusters using a deprecated LTS version are sent to users two months and one 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.
Warning
- Notifications about the scheduled update of clusters using a deprecated interim version are sent to users one week before the update.
- If you upgrade to the LTS version, the appropriate update policy will apply to the cluster.
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