Supported configurations

Configuration	S3 Tables (Iceberg)	S3 bucket
Cluster / broker type	Amazon MSK Provisioned with Express brokers only	Amazon MSK Provisioned with Express brokers only
Input format	JSON or JSON_SCHEMA_GSR	JSON, ByteArray, String
Output format	Apache Iceberg tables; Parquet files with ZSTD or Snappy compression	Objects (compression: NONE, GZIP, or ZSTD)
Schema source	AWS Glue Schema Registry (required)	Not required
Schema evolution	Not supported	Not applicable
Partitioning	Time-based (TIME_HOUR)	Object key template
Data freshness	5–15 minutes (default 10)	5–15 minutes (default 10)
Storage class	Managed by S3 Tables	STANDARD, INTELLIGENT_TIERING, GLACIER_IR

Note

S3 Tables input formats: JSON is plain JSON objects — you provide the Glue Schema Registry ARN that defines the schema. JSON_SCHEMA_GSR is GSR-serialized JSON, where the schema ID is embedded in each record.