On-Premise HA Search supports two kinds of HA configurations: single data center and multiple data centers.
You can configure your On-Premise Search nodes in either of these HA configurations:
To understand what you'll need for your Search configuration, be sure to read Capacity and Scaling
Considerations and Required Nodes for an On
Premise
HA Search Service.
The following diagram shows the simplest HA configuration for search. You might also find it helpful to understand how a single On-Premise Search node works before diving into Configuring the Search Service for High-Availability.
