- Executors: Storm 0.8.0 has a new model where a worker is a process and an executor is a thread.
- Pluggable scheduler
- Throughput improvements
- Decreased ZooKeeper load/increased Storm UI performance
- Abstractions for shared resources
- Tick tuples
and a lot more changes and improvements detailed in the announcement.
Original title and link: Storm 0.8.0: The Most Significant Release of Storm Yet ( ©myNoSQL)