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These settings are available in system.settings and are autogenerated from source.

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s3_validate_etag_on_read

When reading an object from S3 (or an S3-compatible store such as GCS), check that every GET request returns the same ETag that was observed when the object was listed. A single file read issues many ranged GET requests; if the object is overwritten in place between them (for example by an external writer rewriting a fixed key), the reads can otherwise be stitched together from two different object generations and surface as a corrupted checksum or parse error. When a mismatch is detected the read fails with S3_OBJECT_CHANGED_DURING_READ instead of returning inconsistent data. Disable only for workloads that intentionally read objects that are being overwritten and can tolerate inconsistent reads. Not applied to the files of Iceberg tables that are read without an object metadata request (manifests, and Parquet and ORC data files read through a table), which are never overwritten.

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s3_validate_request_settings

Enables s3 request settings validation. Possible values:
  • 1 — validate settings.
  • 0 — do not validate settings.