Hi, can someone explain more details about what model is used to sync docs between the lead and replica in the shard? The model can be push or pull.Supposing I have only one shard that has 1 leader and 2 replicas, when the leader receives a update request, does it will scatter the request to each available and active replica at first and then processes the request locally at last?In this case if the replicas are able to catch up with the leader can I think this is a push model that the leader pushes updates to it's replicas?
What happens if a replica is behind the leader?Will the replica pull docs from the leader and keep a track of the coming updates from the lead in a log(called tlog)?If so when it complete pulling docs it will replay updates in the tlog at last? regards
