Hi I'd like to know the whole process of primary shard & replica shard actual interaction process.
I have a single node and setting with 2 shards & 1 replica. When I start to index document,
since there is only one node (it is mater node), where does replica shard exist?
if a new node join as data node, does master node knows and when push shard to new node as replica?
I trace the source code (1.7.2) and I can see primaryPhase and replicaPhase. but if I have only one node, seems nothing happended on replica.