[Question] how to cache meta data

1

Hi

I’m studying the influxdb cluster these days, and I have a few questions

  1. How does the data node know meta data(shard group, shard owner) ?
    Does the data node ask the meta node every query?
    If a data node caches meta data, how and when does data node update it?

  2. When the replication factor is 2, A particular shard is managed by two data nodes.
    Which data node does the coordinator node request data from?

  3. Can I set the read consistency level like cassandra ?
    if impossible , does read consistency level mean one ?

Thank you in advance.