C. Mohan

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C. Mohan
சி. மோஹன்
Born (1955-08-03) 3 August 1955 (age 68)
Tamil Nadu, India
CitizenshipUnited States
Alma materIndian Institute of Technology, Madras 1972-1977
University of Texas, Austin 1977-1981
Known forARIES
Database systems
Distributed database
Presumed Abort Commit Protocol
Transaction processing
Workflow management
Blockchain
Distributed ledger
Spouse(s)Kalpana Mohan
ChildrenPavithra Mohan
Parthiv Mohan
AwardsUS National Academy of Engineering 2009
ACM SIGMOD Edgar F. Codd Innovations Award 1996
IBM Fellow 1997
IEEE Fellow 2002
ACM Fellow 2002
Indian National Academy of Engineering 2009
Distinguished Visiting Professor, Tsinghua University 2016
Distinguished Alumnus Award, IIT Madras 2003
Scientific career
FieldsComputer Science
InstitutionsTsinghua University 2016-
IBM 1981- 2020
Kerala Blockchain Academy 2020-
Tamil Nadu e-Governance Agency 2019-
INRIA 1998-1999
ThesisStrategies for Enhancing Concurrency and Managing Deadlocks in Data Base Locking Protocols
Doctoral advisorAbraham Silberschatz
In this Indian name, the name Chandrasekaran is a patronymic, and the person should be referred to by the given name, Mohan.

Chandrasekaran Mohan is an Indian-born American computer scientist. He was born on 3 August 1955 in Tamil Nadu, India.[1] After growing up there and finishing his undergraduate studies in Chennai, he moved to the United States in 1977 for graduate studies. After having been an Indian citizen from birth, since 2007 he has been an American citizen and an Overseas Citizen of India (OCI). In June 2020, he retired from being an IBM Fellow at the IBM Almaden Research Center (San Jose, California) after working at IBM Research for 38.5 years.[2] Currently, he is a Distinguished Visiting Professor at China's Tsinghua University.[3] He is also an Honorary Advisor at the Tamil Nadu e-Governance Agency[4] (TNeGA) in Chennai and an Advisor at the Kerala Blockchain Academy[5] in Kerala.

Education[edit]

Mohan received his PhD in computer science from the University of Texas at Austin in 1981. He received a B.Tech. in chemical engineering from IIT Madras in 1977. He had his pre-college education in Vellore, Tamil Nadu.

Career[edit]

Immediately after finishing his PhD in the database area in December 1981, Mohan joined the birthplace of relational databases and SQL, namely IBM Research in San Jose, as a Research Staff Member, and worked on projects like R*, Starburst, Exotica, and DBCache.[6]

15 years after he joined IBM, in June 1997, IBM CEO Louis V. Gerstner Jr. named him an IBM Fellow, IBM's highest technical position for being recognized worldwide as a leading innovator in transaction management.[7] During June 1998 to July 1999, while being on an IBM sabbatical, he worked as a Visiting Scientist at France's premier computer science research institute INRIA Rocquencourt, in the suburbs of Paris. It is the same place where, while being a PhD student at University of Texas at Austin, he had done an internship in the SIRIUS distributed database project during the summer of 1979.

From June 2006 until January 2009, he worked as the IBM India Chief Scientist, based in Bangalore.[8]

After his return to IBM Almaden Research Center at the end of his India assignment, Mohan worked on projects relating to Storage Class Memories,[9] Big Data, Hybrid Transactional/Analytical Processing (HTAP) enhancements to DB2 and Apache Spark, and Blockchain and Distributed ledger technologies. He gave numerous keynotes and other talks on NoSQL, NewSQL, modern enhancements to classic RDBMSs and Big Data.[10]

Since 2017, he has lectured extensively on blockchain and distributed ledger technologies in more than a dozen countries.[11] He has been an evangelist for permissioned/private blockchain systems. He co-organized a Dagstuhl Seminar on "Distributed Computing with Permissioned Blockchains and Databases".[12][13] He gave an invited keynote on "State of Public and Private Blockchains: Myths and Reality" at the prestigious ACM SIGMOD International Conference on Management of Data in July 2019. A video[14] of the keynote, the slides[15] that were presented and an associated invited paper[16] are available. At the Heidelberg Laureate Forum (HLF), Mohan debated the practicality and advisability of permissioned blockchain systems over the permissionless ones with Turing Laureate Silvio Micali and others in September 2018.[17]

In August 2016, Mohan was named a Distinguished Visiting Professor of China's prestigious Tsinghua University.[3] He is associated with its School of Software.

Mohan has published numerous conference and journal papers in the areas of database, workflow and transaction management, and blockchain technologies.[18][19][20][21][22] According to Google Scholar, his h-index is 68 and his i10-index is 141.[21] He is the primary inventor of the ARIES family of recovery and concurrency control methods,[23] and the industry-standard (e.g., X/Open XA) Presumed Abort commit protocol.[24][25] His journal papers on ARIES[26] and Presumed Abort[27] are considered classic papers in the areas of transactions, recovery, distributed commit and locking,[28] and are included in a collection[29] of database papers, informally called the "Red Book", edited by ACM Turing Award winner Prof. Michael Stonebraker and others under a section titled Techniques Everyone Should Know. In the introduction to that section, one of the editors of the Red Book, Peter Bailis, while discussing the ARIES paper, has said "In graduate database courses, this paper is a rite of passage. However, this material is fundamental, so it is important to understand." In the ACM SIGMOD Record series called Reminiscences on Influential Papers, with reference to the ARIES paper, Prof. Betty Salzberg of Northeastern University has said: "The ARIES paper was important for me because it enabled me to envision the mechanisms of recovery in database systems clearly. ... Reading the ARIES paper influenced much of my subsequent research. ... Now it is almost impossible for me to imagine thinking of a database system without ARIES style recovery."[30] Prof. Alan Fekete of University of Sydney, as part of the abstract of a keynote talk by him in February 1993 said the following: "In the past few years, there have been several exciting advances in transaction management that seem certain to influence future commercial systems. One is the invention and publication of improved techniques for implementation of transaction management. In particular, an exciting series of papers have come from the ARIES project led by C. Mohan at IBM Almaden Research Laboratory. There are new algorithms which provide concurrency control for B-tree indices, recovery compatible with fine-grained locking, and concurrency control allowing long-running audits."[31]

Mohan has worked closely with many IBM product groups worldwide and his research results have been implemented in numerous IBM and non-IBM prototypes, and products like IBM Db2 Family, MQSeries,[32] IBM WebSphere, Informix, Cloudscape, IBM Notes, Microsoft SQL Server and IBM System z Parallel Sysplex.[33]

In a 2003 interview conducted by Marianne Winslett as part of the ACM SIGMOD "Distinguished Database Profiles"[34] series, Mohan discussed the first 20 years of his IBM career. Video and audio recordings, and the textual transcript of that interview were published.[6][35][36] That interview provides a historical perspective on the state of the database research and products landscape then and also on Computer Science work in India. It also discusses Mohan's most important research results and how they came about. A Chinese translation of this interview's transcript is also available.[37]

Mohan worked as a technologist during his entire 38.5 years professional career at IBM and avoided becoming a manager! He has often talked about the importance of long-term technical careers with sustained focus in one area to attain excellence and to be effective in innovation.[38][39] Especially in a developing country like India, during his IBM India Chief Scientist assignment as well as at other times, he has often emphasized the need for good technical people to stay technical and not be too attracted by a management career path.[40] In a front-page story back in August 2007, Business Standard, one of India's leading newspapers, discussed Mohan's senior most technical position at IBM and elaborated on his patenting activities.[41]

Awards[edit]

Mohan's research, publications, inventions and technology transfer contributions have been well appreciated both inside and outside IBM over the decades via numerous awards and other recognition.

In February 2009, Mohan was elected to the United States National Academy of Engineering (NAE) "for contributions to locking and recovery algorithms for database systems".[42][43][44] During the same year, he was also elected as a Foreign Fellow of the Indian National Academy of Engineering (INAE).[45] He received the 1996 Association for Computing Machinery (ACM) SIGMOD Edgar F. Codd Innovations Award in recognition of his innovative contributions to the development and use of database systems. He was the first non-American and the fifth person ever to receive that award.[46] The first 4 winners in chronological order were Michael Stonebraker, Jim Gray, Phil Bernstein and David DeWitt. Later, the first two won the Association for Computing Machinery (ACM) Turing Award.

In 2002, Mohan was named an ACM Fellow and an IEEE Fellow. At the 1999 International Conference on Very Large Data Bases (VLDB), he was honored with the 10 Year Best Paper Award[47][48] for the widespread commercial and research impact of his ARIES work which has been widely covered in textbooks[49][50] and university courses.

In 2003, Mohan was named a Distinguished Alumnus of his undergraduate alma mater IIT Madras.[51] In discussing Mohan's accomplishments, that award citation[52] says: "He has played a key role in establishing the foundations of database systems, which are at the core of modern information infrastructure, that support modern society. His work is among the lessons taught to students of database systems across the world. He has won numerous awards and holds key patents. It is rare for the work of one person to have had such a significant research, commercial and societal impact".

From IBM, Mohan has received 2 Corporate and 8 Outstanding Innovation/Technical Achievement Awards. He is an inventor on 50 issued/pending patents[53][54][55] and was named an IBM Master Inventor in 1997.

Professional contributions[edit]

Mohan has discussed his IBM and non-IBM professional activities in and outside Silicon Valley in a short video.[56] He is a frequent speaker in North America, Western Europe and India, and has given talks in 40 countries.[57][58][59][60][61][62][63][64]

Mohan has been on the advisory board of IEEE Spectrum and an editor of VLDB Journal, and Distributed and Parallel Databases. He was a Steering Council member of IBM's Software Group Architecture Board, and a member of IBM's Technical Leadership Team (TLT), IBM Academy of Technology, and Information Management Architecture Board. In the past, he has also been a member of IBM's Research Management Council (RMC), IBM India's Senior Leadership Team, the IBM Asset Architecture Board, and the Bharti and Vodafone Technical Advisory Councils. He also served on the Academic Senate of the International Institute of Information Technology (IIIT) at Bangalore.

References[edit]

  1. ↑ "Life Events". Facebook. Retrieved 17 June 2016.
  2. ↑ "Dr. C. Mohan's Photo and Biodata". Retrieved 22 September 2020.
  3. ↑ 3.0 3.1 "Faculty". School of Software, Tsinghua University. Retrieved 22 September 2020.
  4. ↑ "Announcement of Dr. C. Mohan as Honorary Advisor to TNeGA, News Letter, September - December 2019" (PDF). Tamil Nadu e-Governance Agency, Government of Tamil Nadu. Retrieved 25 September 2020.
  5. ↑ "Advisory Board". Kerala Blockchain Academy. Retrieved 23 September 2020.
  6. ↑ 6.0 6.1 Winslett, Marianne (December 2004). "C. Mohan Speaks Out on R*, Message Queues, Computer Science in India, How ARIES Came About, Life as an IBM Fellow, and More" (PDF). SIGMOD Record. 33 (4): 77–84. doi:10.1145/1041410.1041425. S2CID 37429010. Retrieved 19 June 2016.
  7. ↑ "IBM Fellows Directory, 1963-Present". IBM. Retrieved 22 September 2020.
  8. ↑ "Dr. C. Mohan appointed as IBM India's Chief Scientist". OneIndia. Retrieved 22 September 2020.
  9. ↑ "Implications of Storage Class Memories (SCMs) on Software Architecture - Video of Keynote Talk by Dr. C. Mohan". Non-Volatile Memories Workshop, March 2011. University of California at San Diego (UCSD). Retrieved 24 June 2016.
  10. ↑ "C. Mohan's "Hybrid Transaction and Analytics Processing", "An In-Depth Look at Modern DBMSs" & "Big Data: Hype and Reality"". Retrieved 22 September 2020.
  11. ↑ "Permissioned/Private Blockchains and Databases". Retrieved 23 September 2020.
  12. ↑ "Distributed Computing with Permissioned Blockchains and Databases". Dagstuhl Seminar. 23–28 June 2019. Retrieved 25 September 2020.
  13. ↑ Mohan, C.; Ooi, Beng Chin; Vossen, Gottfried (2019). Mohan, C.; Ooi, Beng Chin; Vossen, Gottfried (eds.). "Distributed Computing with Permissioned Blockchains and Databases (Dagstuhl Seminar 19261)". Dagstuhl Reports. 9 (6): 69–94. doi:10.4230/DagRep.9.6.69. ISSN 2192-5283.
  14. ↑ Mohan, C. "State of Public and Private Blockchains: Myths and Reality". Video of the Keynote at the ACM SIGMOD International Conference on Management of Data, Amsterdam, The Netherlands, 3 July 2019. Retrieved 25 September 2020.
  15. ↑ Mohan, C. "State of Public and Private Blockchains: Myths and Reality". Slides of the Keynote at the ACM SIGMOD International Conference on Management of Data, Amsterdam, The Netherlands, 3 July 2019. Retrieved 25 September 2020.
  16. ↑ Mohan, C. (25 June 2019). "State of Public and Private Blockchains: Myths and Reality". Proceedings of the 2019 International Conference on Management of Data. SIGMOD '19. Amsterdam, Netherlands: Association for Computing Machinery: 404–411. doi:10.1145/3299869.3314116. ISBN 978-1-4503-5643-5. S2CID 195259418.
  17. ↑ "6th HLF – Hot Topic: Blockchain and distributed ledgers - Panel Discussion "Technology", 27 September 2018". YouTube Video. Retrieved 25 September 2020.
  18. ↑ "DBLP List of computer science publications by C. Mohan". Universitat Trier. Retrieved 23 September 2020.
  19. ↑ "Chandrasekaran Mohan - Publications & Citations Over Time". Microsoft Academic. Microsoft. Retrieved 23 September 2020.
  20. ↑ "ResearchGate Profile - C. Mohan". Retrieved 22 June 2016.
  21. ↑ 21.0 21.1 "C. Mohan's Google Scholar Profile". Google Scholar. Retrieved 22 September 2020.
  22. ↑ "C. Mohan Publications". Semantic Scholar. Retrieved 25 September 2020.
  23. ↑ "Repeating History Beyond ARIES" (PDF). C. Mohan, Proceedings of the 25th International Conference on Very Large Data Bases, Edinburgh, UK, September 1999.
  24. ↑ Mohan, C.; Lindsay, Bruce (1985). "Efficient Commit Protocols for the Tree of Processes Model of Distributed Transactions". ACM SIGOPS Operating Systems Review. ACM. 19 (2): 40–52. doi:10.1145/850770.850772. S2CID 52803795.
  25. ↑ Bernstein, Philip; Newcomer, Eric (2009). Principles of Transaction Processing (2nd ed.). Morgan Kaufmann.
  26. ↑ Mohan, C.; Haderle, Donald; Lindsay, Bruce; Pirahesh, Hamid; Schwarz, Peter (March 1992). "ARIES: A Transaction Recovery Method Supporting Fine-Granularity Locking and Partial Rollbacks Using Write-Ahead Logging". ACM Transactions on Database Systems. 17 (1): 94–162. CiteSeerX 10.1.1.109.2480. doi:10.1145/128765.128770. S2CID 8759704.
  27. ↑ Mohan, C.; Lindsay, Bruce; Obermarck, Ron (December 1986). "Transaction Management in the R* Distributed Database Management System". ACM Transactions on Database Systems. 11 (4): 378–396. doi:10.1145/7239.7266. S2CID 10698110.
  28. ↑ "ARIES Family of Locking and Recovery Algorithms". Archived from the original on 19 August 2012. Retrieved 21 June 2016.
  29. ↑ Bailis, Peter; Hellerstein, Joseph; Stonebraker, Michael (2015). Readings in Database Systems (PDF) (5th ed.). Retrieved 20 June 2016.
  30. ↑ Snodgrass, Richard (March 1998). "Reminiscences on Influential Papers" (PDF). ACM SIGMOD Record. 27 (1). Retrieved 21 June 2016.
  31. ↑ Fekete, Alan. "Recent Advances in Transaction Management - Keynote". Google Groups: comp.databases.theory. ADC '93: Fourth Australian Database Conference. Retrieved 21 June 2016.
  32. ↑ "WebSphere MQ: A 15-Year Evolution to Today's System z". Enterprise Systems z/Journal, 19 August 2008. Retrieved 23 June 2016.
  33. ↑ "Innovation Runs Deep in IBM Fellows". IBM Building a Smarter Planet - Smarter Planet Blog, 15 April 2015. Retrieved 18 June 2016.
  34. ↑ "Distinguished Profiles in Databases Interview". Association for Computing Machinery (ACM) Special Interest Group on Management of Data (SIGMOD). Retrieved 22 June 2016.
  35. ↑ "Video Recording of C. Mohan's Distinguished Profiles in Databases Interview by Marianne Winslett". Association for Computing Machinery (ACM) Special Interest Group on Management of Data (SIGMOD). Retrieved 22 June 2016.
  36. ↑ "Audio Recording of C. Mohan's Distinguished Profiles in Databases Interview by Marianne Winslett". Association for Computing Machinery (ACM) Special Interest Group on Management of Data (SIGMOD). Retrieved 22 June 2016.
  37. ↑ "C．Mohan 访谈录 本专访主要介绍了关于 R*系统和消息队列的技术，印度计算机科学发展状况，ARIES 的由来，以及 IBM 院士 C.Mohan 的研究生涯，等等" (PDF). Retrieved 23 June 2016.
  38. ↑ ooNee Studios (17 May 2016), C Mohan Interview at TiETV Lounge #ooneeapp @TiEcon 2016 @SeeMohan #DataEconomy, retrieved 19 June 2016
  39. ↑ Can Turkey transform into an innovative economy?, Ismet Berkan, Hurriyet Daily News, 1 August 2015, retrieved 18 June 2016
  40. ↑ "India yet to reach the height of technical work", The Hindu, 29 December 2009, retrieved 21 June 2016
  41. ↑ "Indian techies log in to elite global R&D". Business Standard, 3 August 2007. Retrieved 18 June 2016.
  42. ↑ National Academy of Engineering Elects 65 Members and Nine Foreign Associates, National Academy of Engineering, 6 February 2009, retrieved 18 June 2016
  43. ↑ "10 Indians in elite US engineering body". Rediff India Abroad. 17 March 2009. Retrieved 22 June 2016.
  44. ↑ "NAE Members Directory - Dr. C. Mohan". National Academy of Engineering. Retrieved 22 June 2016.
  45. ↑ "Engineering Section - II (Computer and Information Technology)". Indian National Academy of Engineering. Retrieved 21 June 2016.
  46. ↑ "SIGMOD Edgar F. Codd Innovations Award". ACM SIGMOD. Retrieved 25 September 2020.
  47. ↑ "VLDB 1999: 10-Year Award". Universitat Trier. Retrieved 22 June 2016.
  48. ↑ "VLDB 1999". Universitat Trier. Retrieved 17 June 2016.
  49. ↑ Ramakrishnan, Raghu; Gehrke, Johannes (2003). Database Management Systems (3rd ed.). United States: McGraw-Hill. ISBN 978-0072465631.
  50. ↑ Elmasri, Ramez; Navathe, Shamkant (2010). Fundamentals of Database Systems (6th ed.). Upper Saddle River, N.J.: Pearson. ISBN 978-0136086208.
  51. ↑ "A happy homecoming for IIT alumni", The Hindu, 31 December 2003, retrieved 18 June 2016[dead link]
  52. ↑ "Distinguished Alumnus Awardees - 2003". IIT Madras Office of Alumni Relations. Retrieved 17 June 2016.
  53. ↑ "Results of Search in US Patent Collection db for: IN/mohan-chandrasekaran". USPTO Patent Full-Text and Image Database. United States Patent and Trademark Office (USPTO). Retrieved 26 September 2020.
  54. ↑ "Results of Search in PGPUB Production Database for: IN/mohan-chandrasekaran". Patent Application Full Text and Image Database. United States Patent and Trademark Office (USPTO). Retrieved 26 September 2020.
  55. ↑ "IBM as the applicant AND Chandrasekaran Mohan as the inventor - Results List". EspaceNet Patent Search. European Patent Office. Retrieved 26 September 2020.
  56. ↑ "Dr. C. Mohan, IBM Almaden Research Center Fellow, talks about his passion for the real-world impact of IBM research". EdCast 2.5 Minutes Video. Retrieved 19 June 2016.
  57. ↑ "List of 50+ seminars given by C. Mohan in 18 countries during his sabbatical (6/98-7/99) at INRIA (Rocquencourt)". IBM. Archived from the original on 9 September 2018. Retrieved 26 September 2020.
  58. ↑ "Dr. C. Mohan to give Keynote Address at FOMAA's Science and Technology Seminar". India Tribune. 30 June 2010. Retrieved 22 June 2016.
  59. ↑ "CEMSE Dean's Distinguished Lecture: IBM Global Technology Outlook (GTO) 2014 by Dr. C. Mohan". King Abdullah University of Science and Technology (KAUST), Saudi Arabia. Archived from the original on 16 August 2016. Retrieved 22 June 2016.
  60. ↑ "AMW 2014 - Alberto Mendelzon International Workshop on Foundations of Data Management: Invited Speakers". Universidad Nacional de Colombia. Archived from the original on 11 January 2017. Retrieved 22 June 2016.
  61. ↑ "Modern Data Management Systems Summit at Tsinghua University". Institute of Data Science, Tsinghua University. Retrieved 22 June 2016.
  62. ↑ "WSO2Con 2011, Colombo, Sri Lanka: IBM Global Technology Outlook (GTO) 2011 By Dr. C Mohan". WSO2. Retrieved 23 June 2016.
  63. ↑ "Big Data: Hype and Reality, Keynote Speaker Dr. C. Mohan". Big Data Analytics and Education Conference, July 2015. İstanbul Şehir University, Istanbul, Turkey. Archived from the original on 16 August 2016. Retrieved 23 June 2016.
  64. ↑ "Valorar la educación, el secreto del éxito en la India: Mohan". Noticias UAG, 14 November 2013. Universidad Autónoma de Guadalajara (UAG). Retrieved 23 June 2016.

External links[edit]

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