Darrell Long

Last updated
Darrell Don Earl Long
Professor Darrell Long in 2022.jpg
NationalityAmerican
Alma mater San Diego State University (B.S. 1984)
University of California, San Diego (M.S. 1986), (Ph.D. 1988)
Known for Computer Data Storage
Spouses
Mary Long
​
​
(m. 1984;died 2014)​
[1]
Elaine Long
​
(m. 2016)​
Awards IEEE Fellow (2006)
AAAS Fellow (2008)
Scientific career
Fields Computer Science
Computer Engineering
Institutions University of California, Santa Cruz
Université Paris–Dauphine
Conservatoire National des Arts et Métiers
Université Paris–Descartes
Doctoral advisor Jehan-François Pâris
Doctoral students Randal Burns

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. [2] He was editor-in-chief of the IEEE Letters of the Computer Society [3] and was editor-in-chief of the ACM Transactions on Storage [4] (TOS). In 2002, he was the founder of the Conference on File and Storage Technologies (FAST).

Contents

Biography

Long did his undergraduate studies at San Diego State University, graduating in 1984, and went on to graduate studies at the University of California, San Diego, earning a Ph.D. in 1988 under the supervision of Jehan-François Pâris. [5]

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, [6] and he is Director emeritus of the Storage Systems Research Center. [7] 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. [8]

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. [9] [ better source needed ] He is an Associate Member of the European Organization for Nuclear Research (CERN).

Long served as the Vice-Chair [10] and then Chair of the University of California Committee on Research Policy. [11] He has served on the University of California President’s Council on the National Laboratories, [12] 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.[ citation needed ] He is a member of the advisory group JASON. [13]

Research

Long's research interests include computer data storage, operating systems, distributed computing, and computer security. [6] In 1991, [14] Long worked on the idea of storing metadata separately from data in the Swift file system. [15] This idea became a central design concept in subsequent distributed file and storage systems, including two projects on which Long was a major contributor: IBM TotalStorage/SAN (Storage Tank) and Ceph. The Ceph [16] distributed file system was first designed and implemented in the Storage Systems Research Center in 2006 [17] by Sage Weil and other members of the SSRC under the direction of Long, Professor Ethan Miller, Professor Scott Brandt, and Dr. Carlos Maltzahn. Long has done further research on metadata for exascale file systems [18] and security for exascale file systems. [19]

Long worked on data deduplication, having worked on deduplication and delta compression for reducing the storage demands for backup [20] and long-term data storage. [21] He also contributed to techniques for scaling deduplication for very large backup systems. [22]

Beyond these areas, Long has written research papers on web caching, [23] power-aware hard disk management in mobile computing, [24] and low-bandwidth multicast techniques for video on demand, [25] among other topics.

Awards and honors

Long became an IEEE Fellow in 2006 "for contributions to storage systems architecture and performance". [26] In 2008 he was inducted as a fellow of the American Association for the Advancement of Science. [6]

Related Research Articles

<span class="mw-page-title-main">Peer-to-peer</span> Type of decentralized and distributed network architecture

Peer-to-peer (P2P) computing or networking is a distributed application architecture that partitions tasks or workloads between peers. Peers are equally privileged, equipotent participants in the network, forming a peer-to-peer network of nodes.

<span class="mw-page-title-main">Plan 9 from Bell Labs</span> Distributed operating system

Plan 9 from Bell Labs is a distributed operating system which originated from the Computing Science Research Center (CSRC) at Bell Labs in the mid-1980s and built on UNIX concepts first developed there in the late 1960s. Since 2000, Plan 9 has been free and open-source. The final official release was in early 2015.

The Free Haven Project was formed in 1999 by a group of Massachusetts Institute of Technology students with the aim to develop a secure, decentralized system of data storage. The group's work led to a collaboration with the United States Naval Research Laboratory to develop Tor, funded by DARPA.

<span class="mw-page-title-main">National Energy Research Scientific Computing Center</span> Supercomputer facility operated by the US Department of Energy in Berkeley, California

The National Energy Research Scientific Computing Center (NERSC), is a high-performance computing (supercomputer) National User Facility operated by Lawrence Berkeley National Laboratory for the United States Department of Energy Office of Science. As the mission computing center for the Office of Science, NERSC houses high performance computing and data systems used by 9,000 scientists at national laboratories and universities around the country. Research at NERSC is focused on fundamental and applied research in energy efficiency, storage, and generation; Earth systems science, and understanding of fundamental forces of nature and the universe. The largest research areas are in High Energy Physics, Materials Science, Chemical Sciences, Climate and Environmental Sciences, Nuclear Physics, and Fusion Energy research. NERSC's newest and largest supercomputer is Perlmutter, which debuted in 2021 ranked 5th on the TOP500 list of world's fastest supercomputers.

Single-instance storage (SIS) is a system's ability to take multiple copies of content and replace them by a single shared copy. It is a means to eliminate data duplication and to increase efficiency. SIS is frequently implemented in file systems, e-mail server software, data backup, and other storage-related computer software. Single-instance storage is a simple variant of data deduplication. While data deduplication may work at a segment or sub-block level, single-instance storage works at the whole-file level and eliminates redundant copies of entire files or e-mail messages.

Cloud storage is a model of computer data storage in which data, said to be on "the cloud", is stored remotely in logical pools and is accessible to users over a network, typically the Internet. The physical storage spans multiple servers, and the physical environment is typically owned and managed by a cloud computing provider. These cloud storage providers are responsible for keeping the data available and accessible, and the physical environment secured, protected, and running. People and organizations buy or lease storage capacity from the providers to store user, organization, or application data.

Ceph is a free and open-source software-defined storage platform that provides object storage, block storage, and file storage built on a common distributed cluster foundation. Ceph provides completely distributed operation without a single point of failure and scalability to the exabyte level, and is freely available. Since version 12 (Luminous), Ceph does not rely on any other conventional filesystem and directly manages HDDs and SSDs with its own storage backend BlueStore and can expose a POSIX filesystem.

In computing, data deduplication is a technique for eliminating duplicate copies of repeating data. Successful implementation of the technique can improve storage utilization, which may in turn lower capital expenditure by reducing the overall amount of storage media required to meet storage capacity needs. It can also be applied to network data transfers to reduce the number of bytes that must be sent.

<span class="mw-page-title-main">Cloud computing</span> Form of shared internet-based computing

Cloud computing is the on-demand availability of computer system resources, especially data storage and computing power, without direct active management by the user. Large clouds often have functions distributed over multiple locations, each of which is a data center. Cloud computing relies on sharing of resources to achieve coherence and typically uses a pay-as-you-go model, which can help in reducing capital expenses but may also lead to unexpected operating expenses for users.

Exascale computing refers to computing systems capable of calculating at least "1018 IEEE 754 Double Precision (64-bit) operations (multiplications and/or additions) per second (exaFLOPS)"; it is a measure of supercomputer performance.

<span class="mw-page-title-main">Róbert Lovas</span> Hungarian computer scientist

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Convergent encryption, also known as content hash keying, is a cryptosystem that produces identical ciphertext from identical plaintext files. This has applications in cloud computing to remove duplicate files from storage without the provider having access to the encryption keys. The combination of deduplication and convergent encryption was described in a backup system patent filed by Stac Electronics in 1995. This combination has been used by Farsite, Permabit, Freenet, MojoNation, GNUnet, flud, and the Tahoe Least-Authority File Store.

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<span class="mw-page-title-main">Sage Weil</span> Software engineer

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References

  1. ↑ "Obituary of Mary Katherine Long". Archived from the original on 2022-06-28. Retrieved 2022-06-28.
  2. ↑ "Darrell Long Faculty Profile" . Retrieved 2023-04-05.
  3. ↑ "CSDL | IEEE Computer Society". Archived from the original on 2017-11-15. Retrieved 2017-11-14.
  4. ↑ Transactions on Storage Archived 2019-04-15 at the Wayback Machine , retrieved 2012-04-07.
  5. ↑ Darrell Long at the Mathematics Genealogy Project OOjs UI icon edit-ltr-progressive.svg
  6. 1 2 3 Three USC professors elected AAAS Fellows Archived 2011-10-23 at the Wayback Machine , Tim Stephens, UCSC University News, December 17, 2008, retrieved 2012-02-25.
  7. ↑ UCSC Storage Systems Research Center faculty Archived 2012-02-13 at the Wayback Machine , retrieved 2012-12-15.
  8. ↑ Female computer science grad students find supportive environment at UC Santa Cruz Archived 2016-03-14 at the Wayback Machine , retrieved 2021-08-19.
  9. ↑ Curriculum Vitae, retrieved 2017-12-16.
  10. ↑ UCORP Annual Report 2001-2002 Archived 2021-08-20 at the Wayback Machine retrieved 2021-08-19.
  11. ↑ UCORP Annual Report 2002-2003 Archived 2021-08-20 at the Wayback Machine retrieved 2021-08-19.
  12. ↑ List of 2004 members of the University of California President’s Council on the National Laboratories Archived 2021-08-20 at the Wayback Machine retrieved 2021-08-19.
  13. ↑ JASON Defense Advisory Panel Reports Archived 2014-08-27 at the Wayback Machine retrieved 2014-8-6.
  14. ↑ Cabrera, Luis-Felipe; Long, Darrell D.E. (1991), "Swift: A Distributed Storage Architecture for Large Objects", Proc. 11th Symposium on Mass Storage Systems (MSS), pp. 123–128, doi:10.1109/MASS.1991.160223, ISBN   978-0-8186-2155-0, S2CID   44826105 .
  15. ↑ Long, Darrell D.E.; Montague, Bruce; Cabrera, Luis-Felipe (1994), "Swift/RAID: A Distributed RAID System", Computing Systems, vol. 7, pp. 331–359, CiteSeerX   10.1.1.53.7183 .
  16. ↑ Weil, Sage A.; Brandt, Scott A.; Miller, Ethan L.; Long, Darrell D. E.; Maltzahn, Carlos (2006), "Ceph: a scalable, high-performance distributed file system", Proc. 7th USENIX Symp. Operating Systems Design and Implementation (PDF), pp. 307–320, archived (PDF) from the original on 2012-03-09, retrieved 2012-02-26.
  17. ↑ SSRC Exascale Storage Research Archived 2009-04-29 at the Wayback Machine retrieved 2021-08-20.
  18. ↑ Parker-Wood, Aleatha; Madden, Brian; McThrow, Michael; Long, Darrell D. E.; Adams, Ian; Wildani, Avani (2013), "Examining Extended and Scientific Metadata for Scalable Index Designs", Proceedings of the 6th International Systems and Storage Conference (SYSTOR 2013), archived from the original on 2021-12-14, retrieved 2022-06-07
  19. ↑ Li, Yan; Dhotre, Nakul; Ohara, Yasuhiro; Kroeger, Thomas; Miller, Ethan L.; Long, Darrell D. E. (2013), "Horus: Fine-Grained Encryption-Based Security for Large-Scale Storage", Proc. 11th Conference on File and Storage Systems (FAST 2013)), archived from the original on 2021-12-14, retrieved 2022-06-07
  20. ↑ Burns, Randal C.; Long, Darrell D. E. (1997), "Efficient distributed backup with delta compression", Proceedings of the 5th Workshop on I/O in Parallel and Distributed Systems (IOPADS '97), doi: 10.1145/266220.266223 , S2CID   1298161
  21. ↑ You, Lawrence; Pollack, Kristal; Long, Darrell D. E. (2005), "Deep Store: An Archival Storage System Architecture", Proceedings of the 21st International Conference on Data Engineering (ICDE '05), archived from the original on 2021-08-20, retrieved 2021-08-20
  22. ↑ Bhagwat, Deepavali; Eshghi, Kave; D. E. Long, Darrell; Lillibridge, Mark (2009), "Extreme Binning: Scalable, Parallel Deduplication for Chunk-based File Backup", (MASCOTS 2009), archived from the original on 2017-03-08, retrieved 2017-03-08
  23. ↑ Kroeger, T.M.; Long, D.D.E.; Mogul, J.C. (1997), "Exploring the bounds of web latency reduction from caching and prefetching", Proc. USENIX Symp. Internet Technologies and Systems (PDF), archived (PDF) from the original on 2016-03-04, retrieved 2012-02-26.
  24. ↑ Helmbold, David P.; Long, Darrell D. E.; Sherrod, Bruce (1996), "A dynamic disk spin-down technique for mobile computing", Proceedings of the 2nd annual international conference on Mobile computing and networking, pp. 130–142, doi:10.1145/236387.236423, ISBN   978-0897918725, S2CID   7877062 .
  25. ↑ Paris, J.-F.; Carter, S.W.; Long, D.E. (1998), "A low bandwidth broadcasting protocol for video on demand", Proceedings 7th International Conference on Computer Communications and Networks (Cat. No.98EX226), pp. 690–697, doi:10.1109/ICCCN.1998.998831, ISBN   978-0-8186-9014-3, S2CID   8520094
  26. ↑ List of IEEE Fellows Archived 2012-03-01 at the Wayback Machine , retrieved 2012-12-15.
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