Types of Elasticsearch Clients for Gateways to Use
After deciding where to place your gateways, decide which type of Elasticsearch client for the gateways to use to connect to the Elasticsearch cluster. There are two types of Elasticsearch client for this purpose: transport clients and node clients.
Transport clients
When gateways use transport clients to connect to an Elasticsearch cluster, the gateways connect to one or more transport nodes in that cluster. The gateways pass replicated updates from the source MapR cluster to the transport nodes. These nodes are responsible for distributing the updates to the correct nodes in the Elasticsearch cluster.
Node clients
When gateways use node clients to connect to an Elasticsearch cluster, the gateways themselves distribute updates to the correct nodes in the Elasticsearch cluster.
For more information about these clients and for instructions about how to use them, see the Elasticsearch documentation at https://www.elastic.co/guide/index.html.