Untersuchung und Entwicklung von Cloud-Computing-Diensten als Grundlage zur Schaffung eines Marktplatzes

This thesis evaluates and develops, where this is needed and possible, the technical principles of a cloud marketplace. These basic principles are infrastructure services for managing and provisioning computational power, persistent storage and (virtual) network resources. Furthermore tools are needed to integrate the resources in the form of services and provide the customers a uniform user interface. The existing services are evaluated in this thesis. The main focus is on the infrastructure and storage services that are part of the Amazon Web Services (AWS), the storage service Google Storage and the platform service Google App Engine. The capability of Eucalyptus, a solution to build an infrastructure that provides the API of the AWS, is evaluated. This analysis includes the examination of characteristic administration tasks. The computational power of a private cloud with Eucalyptus is compared with the public cloud infrastructure service Amazon Elastic Compute Cloud (EC2). Different ways to store data in clouds are evaluated. One way to optimize storage in clouds is the usage of distributed filesystems. Different distributed filesystems are studied regarding their suitability and performance. Diffuser, a tool to automatically deploy virtual clusters with distributed storage in cloud infrastructures is developed. To increase the availability of data in object-based storage services the redundant storage solution Octopus, which can work with different storage services, is developed. The different network resources in cloud infrastructures are examined and the network performance of a private cloud is compared with EC2. Practical tools are needed to work with different public and private cloud infrastructure and storage services in a seamless way. The existing tools for interacting with cloud services are evaluated regarding their systemic advantages and drawbacks as well as their key data. Based on these results an optimized tool, the KOALA Cloud Manager, is designed and developed. This tool can be used as the basis for the development of a cloud marketplace.