ClickHouse 26.8 LTS: 57 Breaking Changes Since 26.3
If you run ClickHouse in production, you're probably on 26.3 LTS. And now 26.8 LTS has been announced, which means the LTS-to-LTS upgrade conversation starts again. Here's the thing most release posts skip: this is not a one-release hop. Going from 26.3 LTS to 26.8 LTS means crossing 26.4, 26.5, 26.6 and 26.7 as well. Every breaking change in those four releases applies to you, and some of the…
If you run ClickHouse in production using the 26.3 LTS version, the new 26.8 LTS release is now available. However, this upgrade is not a straightforward one-step process, as it involves upgrading through versions 26.4, 26.5, 26.6, and 26.7 as well. The upgrade process includes various breaking changes, silent changes, and new features that can impact your production environment.
It's essential to understand these changes before proceeding with the upgrade to avoid potential issues. Some critical changes include the requirement for AVX2 support in the x86 build, a mandatory migration order for the insert_deduplication_version setting, and S3 queries no longer using the server's own credentials by default.
Written by urgent.news from Dev.to's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
