| Batch processing | Stream processing | |
|---|---|---|
| Responsiveness | No response to the client needed | No response to the client needed |
| Timelineness | On demand | Real-time |
| Input | Bounded input with finite size. A large amount of data | Input has no boundary (infinite streams) |
| Output | Materialized views, aggregated metrics, etc. | Materialized views, aggregated metrics, etc. |
| Performance measurement | Throughput | Throughput, latency |
| Fault tolerance | Better (a fixed set of input data) | More challenging (the input data keeps flowing in) |
| Example | MapReduce | |
| Diagram |  |
 |
-
Concepts
- A system that contains two processing paths (batch and streaming) simultaneously.
-
Cons
- There are two codebases to maintain.
-
Diagram
-
Concepts
- A system that combines the batch and streaming in one processing path.
- Handle both real-time data processing and continuous data reprocessing using a single stream processing engine.
-
Diagram
