Data distribute in large cluster with many indices (Elasticsearch)

Question

I have a cluster with 30 nodes and a lot of indices with small number of primary shards . Let's say 800 indices . most indices only have 1 or 2 primary shards. I want to know how elasticsearch cluster distribute data across the cluster such a lot of small indices? Does all nodes in cluster receive data evenly ? or near evenly ? Thanks, Sun Chanras

Answer 1

The cluster reorganizes itself to spread the data evenly.

You can read it here

For your specific case you cane use kopf, A greate plugin that visualize the location of all shards in each node. I think that there are more similar plugins but this is the only one that i worked with.