@fkrauthan 1 - You can create a Map Reduce with multiple deployments and when you trigger your MR do not specify the deployment... it would get the available one. 2- With

N/task Module

you can have what you need from the Map Reduce status. 3- Here I think you have a misconception of how M/R works... Normally in getInput() stage you do a search or something but passing a list of IDs is not generally a good approach of course it depends on your use case...