Key	Description	Data Type	Probable Values
type	Specifies the output file format for writing data. Currently, only the "PARQUET" format is supported.	string	"PARQUET"
s3_bucket	The name of the Amazon S3/GCS bucket (without s3:// or gs://) where your output files will be stored. Ensure that the bucket exists and that you have proper access.	string	A valid S3 bucket name (e.g. "olake-s3-test")
s3_region	The AWS/GCS region where the specified S3 bucket is hosted.	string	AWS/GCS region codes such as "us-west-2", "ap-south-1", etc.
s3_access_key	The AWS/GCS HMAC access key used for authenticating S3 requests.	string	A valid AWS/GCS HMAC access key
s3_secret_key	The AWS/GCS HMAC secret key used for S3 authentication. This key should be kept secure.	string	A valid AWS/GCS HMAC secret key
s3_endpoint	(Optional) The custom endpoint for S3-compatible services. Required for GCS using HMAC keys.	string	"https://storage.googleapis.com"
s3_path	(Optional) The specific path (or prefix) within the S3 bucket where data files will be written. This is typically a folder path that starts with a / (e.g. "/data").	string	A valid path string
max_file_size_mb	(Optional) Rolls a partition into a new parquet file once the current file reaches this size in MB. Fractional values are allowed. Defaults to 512 when unset.	number	A positive number (integers e.g. 512, 128 or fractional e.g. 0.1 for 100KB)