Hi, Sorry for the delay in sending this email.
Few things on S4 roadmap - S4 integration with Helix for partition management, elasticity and fault tolerance. - Integration with YARN for resource management. Few other things I can think about - Having adapters for pub/sub systems like Kafka, rabbitmq. - Integration with other storage systems for check pointing like hbase, HDFS, S3 etc Feel free to add to the list. thanks, Kishore G