This thesis would not have been possible without the support of many peo-ple. First and foremost I offer my sincerest gratitude to my supervisors Stephan Koch and Andreas Ulbig from the ETH Zurich for their encour-agement, motivation, support, and inspiration. They were always willing to help me and gave me advice from their impressive expertise. I also wish to thank my third supervisor from the Karlsruhe Institute of Technology, Matthias Kahl, for his support and his efforts for enabling my thesis at the ETH. My grateful thanks also go to Prof. Dr. Andersson and Prof. Dr. Leibfried for giving me the opportunity to write my thesis at the ETH Zurich. My sincere thanks also go to my brother Dominik Fortenbacher and my friends Dominic Maurath and Roger Buser for their support at the final stage of the thesis. I also would like to thank my fellows from the ETH for making my study and stay a great experience. Above all, my most important and greatest debt of appreciation goes to my wonderful parents, without whom I would never have been able to achieve

to investigate new methods of storage delivery that were not plausible in the past. In this thesis we present a new “enhanced ” storage device called a Multiported Storage Device which is endowed with more processing power and intelligence than the traditional block storage device. A multiported storage device

This paper presents a novel cryptographic capability system addressing the security and performance needs of network attached storage systems in which file management functions occur at a different location than the file storage device. In our NASD system file managers issue capabilities to client

The increasing power and decreasing cost of microprocessors has made it possible to incorporate a high degree of intelligence into peripheral storage devices, so that it is now feasible to move much of the functionality traditionally associated with a file system from the host computer

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For his mentorship, constant guidance, and confidence, I’d like to thank Kevin Schneider for all that he has done to help me succeed. His knowledge and dedication have been an inspiration to me, and I hope to aspire to his example. And to Scott Hudson, for his dedication to improving the education of young engineers and his tireless work to provide for each and every student, I don’t think he’ll ever get enough credit. I want to thank my parents for having always been there when I needed them, and for all of their loving support, which has made everything I accomplish possible. Finally, I’d like to thank my wife, Deb. She had to put up with me during this process, so that’s saintly enough. However, her love and words of encouragement made all of this possible, and I don’t think I could ever thank her enough.

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In a petabyte-scale file system, metadata access performance and scalability will significantly affect the whole system’s performance and scalability. We present a new approach called Dynamic Hashing (DH) for metadata management. DH introduces the RELAB (RElative LoAd Balancing) strategy to adjust the metadata distribution when the workload changes dynamically. Elasticity strategy is proposed to support the MDS cluster changes. WLM (Whole Lifecycle Management) strategy is presented to find hot spots in the file system efficiently and reclaim replicas for these hot spots when necessary. DH combines these strategies and Lazy Policies borrowed from the Lazy Hybrid (LH) metadata management together to form an adaptive, high-performance and scalable metadata management technique. 1.

present a novel approach to providing performance guarantees in this highly-volatile scenario, in an efficient and cost-effective way. Facade, a virtual store controller, sits between hosts and storage devices in the network, and throttles individual I/0 requests from multiple clients so that devices do

The integration of renewable energy resources with a UAV storage device is an important part for energy challenges that the world is facing now a days. With rapid investigation and development of electric energy storage devices in the world there is a growing interest to integrating both electrical