Diplomarbeit aus dem Jahr 2009 im Fachbereich Informatik - Wirtschaftsinformatik, Note: 1,0, FOM Essen, Hochschule fur Oekonomie & Management gemeinnutzige GmbH, Hochschulleitung Essen fruher Fachhochschule, Sprache: Deutsch, Abstract: This diploma thesis deals with high availibility specially on open source software. A short brief explained why using open source software. Availibilty and other operating figures will be defined. Measureplans to solve this problem were made by German Bundesamt fuer Sicherheit in der Informationstechnik and the IT infrastructure library. DRBD and iSCSI were used to realize a small prized storage attached network. Different kind of database clusters using MySQL. Heartbeat and Linux Virtual Server are needed for high availibility and loadbalancing. Some examples shows how to reach high availibility on low costs with open source software.