Cloud computing has the advantage of converting capital expenses into operational costs. This student thesis evaluates a phase driven methodology for migration of the database layer to the Cloud based on a research case study. In addition, a Cloud data migration tool is evaluated. We build an evaluation design for the methodology and the tool. Based on the methodology and with the help of the Cloud data migration tool, an application from the e-Science field is migrated to Amazon Web Services. During the migration project we collect data and document all shortcomings concerning the methodology and the tool. This evaluation data is afterwards analysed, to see how well the methodology and the tool support the migration. The results of the analysis lead to improvement suggestions on the methodology and the Cloud data migration tool.