This reader will fetch bytes of each key one at a time using [AmazonS3Client.getObject].
Subclass must extend [read] method to map from S3 object bytes to (K,V)
Linear Supertypes
BaseS3RecordReader[K, V], LazyLogging, RecordReader[K, V], Closeable, AutoCloseable, AnyRef, Any
This reader will fetch bytes of each key one at a time using [AmazonS3Client.getObject]. Subclass must extend [read] method to map from S3 object bytes to (K,V)