/h2><p>Deploy Istio across a small number of large clusters, rather than a large number
of small clusters. Instead of adding clusters to your deployment, the best
practice is to use <a href=/v1.25/docs/ops/deployment/deployment-models/#namespace-tenancy>namespace tenancy</a>
to manage large clusters. Following this approach, you can deploy Istio across
one or two clusters per zone or region. You can then deploy a control plane on
one cluster per region or zone for added reliability.</p><h2 id=deploy-cluster