v.25.11Improvement

Allow using opt-in AWS regions

Official CH changelog text
Allow using opt-in AWS regions for S3 automatically when the region is not specified in the endpoint. Reference: opt-in AWS regions. #88930 (Andrey Zvonov).
ClickHouse now supports automatic usage of opt-in AWS regions for S3 when the region is not explicitly specified in the endpoint.

Why it matters

This feature addresses the limitation where users had to manually specify opt-in AWS regions for S3 storage in ClickHouse. By enabling automatic recognition and use of these regions, it simplifies configuration and improves compatibility with newer or less commonly used AWS regions.

How to use it

Users do not need to specify the AWS region in the S3 endpoint for opt-in regions. ClickHouse will automatically detect and use the appropriate opt-in AWS region when connecting to S3 storage.

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