Cloud Computing als neue Herausforderung für Management und by Gerald Münzl, Michael Pauly, Martin Reti

By Gerald Münzl, Michael Pauly, Martin Reti

Cloud Computing wird von nahezu allen führenden Analysten als einer der Top-5-IT-Trends gesehen, der gegenwärtig aus der Hype-Phase in den prestige der praktischen betrieblichen Umsetzung übergeht. Inzwischen wird nicht mehr diskutiert, ob Cloud Computing überhaupt eine praktikable Möglichkeit des IT-Sourcing ist, sondern vielmehr, wie diese Möglichkeit sich sicher und mit hohem Nutzen für Firmen einsetzen lässt. Es wird aufgezeigt, wo die Vorteile aber auch die Stolpersteine liegen und welche prinzipiellen Lösungen es gibt, um die Chancen zu realisieren und Risiken möglichst zu umgehen.

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2 Umsetzung der „neuen“ IT-Strategie Es empfiehlt sich, den Einsatz von Cloud Computing genau zu planen und in einer entsprechenden Roadmap niederzulegen3. Hier können im Vorfeld bereits die funktionalen Anforderungen an Cloudlösungen definiert werden. Der oder die CloudProvider müssen ein Leistungsportfolio bieten, das auch den zukünftigen Unternehmensanforderungen gewachsen ist. Wenngleich sich dies primär auf die qualitative Prozessunterstützung bezieht, sollte dennoch geklärt werden, wie schnell der Provider dynamische Prozesslast (quantitativ) bedienen kann.

Der Weg in die Cloud. 3. Auflage, mitp Verlag, Heidelberg, München, Landberg, Frechen, Hamburg, 2013. 2 Umsetzung der „neuen“ IT-Strategie 27 Bang“-Migration wird dort angewendet, wo ein Doppelbetrieb kostenintensiv, organisatorisch schwer durchzuführen oder nicht sinnvoll ist. Mögliche Fall-BackSzenarien sind bei dieser Vorgehensweise meist komplex. Schrittweise Migration Bei der phasenweisen Migration werden bestimmte Gruppen von Benutzern nach und nach migriert. Durch die Größe dieser Schritte kann die Komplexität gut gesteuert werden.

Die ausgereiftesten und verbreitetsten Spezifikationen bzw. Standards sind mit Blick auf die Cloud-Interoperabilität Webservices ws-* und XML-Datenformate sowie REST. Doch sowohl anbieterseitig3 als auch nutzerseitig4 sind entsprechende Initiativen, wie beispielsweise Eukalyptus5, gestartet. 2014). 2014). 2014). 6 Zu den Vor- und Nachteilen einer Cloud-Implementierung unter OpenStack siehe Crisp Research: Der CIO im OpenStack Dilemma: BUY oder DIY? 2014). 2 Standards 49 für Cloud Computing zur Verfügung stellt.

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