S4 0.5: piper release, focus on functionality and usability
- functional API
- checkpointing
- S4 commands toolset
S4 0.6: focus on application execution and performance
- runtime isolation
- metrics
- I/O PEs
- performance improvements
- scalability
- application upgrades: stateful upgrades, live stateless upgrades
S4 0.7: elasticity
- integration with Helix
Other tasks / features
- integration with resource manager
- stream mining