I have read this link:http://druid.io/docs/0.7.3/Realtime-ingestion.html#sharding.
Is the “shardSpec” for scaling the data from a datasource into the multi realtime nodes?
For example,there is a kafka topic having 3 partitions,
if I want to improve the performance of indexing build from realtime nodes,
I should add 3 real time nodes in the same consumer group for this topic, and assign the different “partitionNum” to 3 realtime nodes. Is it right?