scaling-overlay-networks-scale-out.html

---
date: 2015-02-26T13:37:00.003+01:00
tags:
- podcast
- scalability
- overlay networks
title: 'Scaling Overlay Networks: Scale-Out Control Plane'
url: /2015/02/scaling-overlay-networks-scale-out/
---

<p>A week or so ago I described why a <ahref="/2015/02/myths-that-refuse-to-die-scalability-of/">properly implemented hypervisor-based overlay virtual networking data plane is not a scalability challenge</a>; even though the <ahref="/2015/02/update-performance-of-hash-table-lookups/">performance might decrease slightly as the total number of forwarding entries grow</a>, modern implementations <ahref="/2015/02/performance-of-hypervisor-based-overlay/">easily saturate 10GE server uplinks</a>.</p>
<p>Scalability of the central controller or orchestration system is a totally different can of worms. As I explained in the <ahref="http://content.ipspace.net/get/OverlayScale"><em>Scaling Overlay Networks</em></a>, the only approach that avoids <ahref="/2014/09/controller-cluster-is-single-failure/">single failure domain</a> and guarantees scalability is <ahref="http://content.ipspace.net/get/3 - Scale-Out Control Plane.mp4">scale-out control plane architecture</a>.</p>
<divclass="jump-link"><ahref="http://content.ipspace.net/get/3 - Scale-Out Control Plane.mp4">Watch the video</a></div>