Structured Streaming model
A Structured Streaming model is based on a simple but powerful premise: any query executed on the data will yield the same results as a batch job at a given time. This model ensures consistency and reliability by processing data as it arrives in the data lake, within the engine, and when working with external systems.
As seen before in the previous chapters, to use Structured Streaming we just need to use Spark dataframes and the API, stating which are the I/O locations.
Structured Streaming models work by treating all new data that arrives as a new row appended to an unbound table, thereby giving us the opportunity to run batch jobs on data as if all the input were being retained, without having to do so. We then can query the streaming data as a static table and output the result to a data sink.