# Redundancy

<span class="de_7804C9C27D">Running data server instances (main, redundant, load balancing)</span>

<span class="de_7804C9C27D">Main – only one server</span>

<span class="de_7804C9C27D">Redundant – 2 parallel servers working simultaneously</span>

<span class="de_7804C9C27D">Load balancing - Load balancing aims to optimize resource use, maximize throughput, minimize response time, and avoid overload of any single resource. Using multiple components with load balancing instead of a single component may increase reliability and availability through redundancy.</span>

<span class="de_7804C9C27D">Load balancing redundancy for the data base (Mongo Data Base) or load balancing for the software instance.</span>