I am wondering if the below features available for Storm topologies or there are hooks that can simulate them:
1. Local Fields grouping. There is Local Shuffle grouping. Local Fields grouping may also be a very useful feature for some use cases where we don't want tuple movements across worker as far as possible, but keeping benefits of fields grouping. I made changes in the Storm 0.9.0.1 code base (non-apache) and it seems to be working 2. Ability to cancel tuples explicitly by Spouts 3. Ability to query the state of a tuple (by its object id) 4. Time-to-live property of tuples. The framework should through away the tuples which are not processed within the time-time-to live period These features may be helpful in certain use cases. -- Nipun Talukdar Bangalore
