Darrell Don Earl Long is an American computer scientist and computer engineer who is the inaugural holder of the Kumar Malavalli Endowed Chair of Storage Systems Research and Distinguished Professor Emeritus of Engineering at the University of California, Santa Cruz. He was editor-in-chief of the IEEE Letters of the Computer Society and was editor-in-chief of the ACM Transactions on Storage Transactions on Storage , retrieved 2012-04-07. (TOS). In 2002, he was the founder of the Conference on File and Storage Technologies (FAST).
While in graduate school, he worked as a lecturer in mathematics at San Diego State University and in computer science at the University of California, San Diego. After earning his Ph.D. he joined the faculty of the University of California, Santa Cruz. At UCSC, he has been associate dean for research and graduate studies in the Jack Baskin School of Engineering, and he is Director emeritus of the Storage Systems Research Center. UCSC Storage Systems Research Center faculty , retrieved 2012-12-15. During his tenure at the SSRC, seven women earned Ph.D's in the program, which is noteworthy in the field of Computer Science, where women are significantly underrepresented. Female computer science grad students find supportive environment at UC Santa Cruz , retrieved 2021-08-19.
Long has held visiting faculty positions at the Université Paris–Dauphine (Paris IX), the Conservatoire National des Arts et Métiers, the Université Paris–Descartes (Paris V), Sorbonne Université (Pierre et Marie Curie, Paris VI), the University of Technology, Sydney, the Center for Communications Research, the United States Naval Postgraduate School and is Professor ad Honorem de la Universidad Católica del Uruguay. Curriculum Vitae, retrieved 2025-07-07. He is an Associate Member of the European Organization for Nuclear Research (CERN).
Long served as the Vice-Chair UCORP Annual Report 2001-2002 retrieved 2021-08-19. and then Chair of the University of California Committee on Research Policy. UCORP Annual Report 2002-2003 retrieved 2021-08-19. He has served on the University of California President’s Council on the National Laboratories, List of 2004 members of the University of California President’s Council on the National Laboratories retrieved 2021-08-19. and on the Science & Technology, National Security and Intelligence committees for those laboratories. He served for many years on the National Research Council's Standing Committee on Technology Insight-Gauge, Evaluate, and Review (TIGER), and the Committee on Defense Intelligence Agency Technology Forecasts and Reviews. He served on the National Research Council's Committee on Science and Technology for Defense Warning. He was a member of the United States Army Laboratory Assessment Group (ALAG) and the United States Army Technology Objectives review panel. He is a member of the Intelligence Science and Technology Experts Group (ISTEG) for the National Academies of Sciences, Engineering and Medicine. He is a member of the advisory group JASON. JASON Defense Advisory Panel Reports retrieved 2014-8-6.
Long worked on data deduplication, having worked on deduplication and delta compression for reducing the storage demands for backup and long-term data storage. He also contributed to techniques for scaling deduplication for very large backup systems.
Beyond these areas, Long has written research papers on web caching,. power-aware hard disk management in mobile computing,. and low-bandwidth multicast techniques for video on demand, among other topics.
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