We have a kafka cluster with 10 brokers and we are using the kafka replication tool (kafka-reassign-partitions.sh) when we need to add more brokers to the cluster. But this tool tends to move too many topic/partitions around at the same time which causes instability. Do we have an option to do it more slowly (e.g. move one topic/partition at a step) or did some one build a tool on top of 'kafka-reassign-partitions.sh'?
Another use case is when a broker node went down, do we have a tool to move the topic/partitions serviced by this node to the remaining nodes (and doing that in a fashion which doesn't cause too much instability)?
