Updated extreme sailing series (markdown)

wiki/extreme-sailing-series.md

@@ -64,4 +64,8 @@ The actual setup is depicted in the following image. It is easy to see that all
 ### Target
 The following image depicts the setup that is desirable for the next events but not yet implemented. It features a local setup where the dependency on a reliable and fast internet connection is minimized as much as possible.
 
+The core of this setup is a server that not only hosts a SAP Sailing Analytics but also the TracTrac server. This way the distribution of analytical information is not dependent on the speed and bandwidth of the local internet connection. By adding a DNS server in front of this analytics server local requests can be directed to the local server even when guests use a public internet address (e.g. www.sapsailing.com). 
+
+In case of a problem with the local server requests can be redirected to the external analytics server. This server is constantly fed with data by a replication channel that gets information bits from the local analytics server.
+
 <img src="/wiki/images/ESSSetupSOLL.jpg"/>