- My first name is Orna, my last name is {Agmon Ben-Yehuda}. Ladypine is the English translation of my first name.
- I am an adjunct senior lecturer in the CS faculty in the Technion.
- Email: ladypine at cs (you know the rest: technion, ac, il).
- Office: 323 (but meetings are usually held in 626)
- Office phone number: 04-8294306
- Office hours: Mondays, 08:00-15:30
- My CS Faculty homepage
- Private hompage: ladypine.org
- Google Scholar Profile
- ACM Author page
Thesis
- PhD, under the supervision of Prof. Assaf Schuster, about Efficient, Non-Cooperative Sharing of Computing Resources.
- Incentives and General Welfare Functions in the Off-Line Cluster Scheduling Problem, Masters thesis in applied mathematics, under the supervision of Prof. Rann Smorodinsky.
Journal Papers
-
The Rise of RaaS: the Resource-as-a-Service cloud
Orna Agmon Ben-Yehuda, Muli Ben-Yehuda, Assaf Schuster, Dan Tsafrir
Communications of the ACM (CACM), July 2014frames are not supported -
, Orna Agmon Ben-Yehuda, Muli Ben-Yehuda, Assaf Schuster, Dan Tsafrir. ACM Transactions on Economics and Computation
(TEAC
), vol 1, No. 3, Article 16, September 2013.–>Deconstructing Amazon EC2 Spot Instance Pricing
Orna Agmon Ben-Yehuda, Muli Ben-Yehuda, Assaf Schuster, Dan Tsafrir
ACM Transactions on Economics and Computation,
vol 1, No. 3, Article 16, September 2013frames are not supportedThis is an extended version of the conference paper, including cloud trace driven simulations and a postmortem section, showing that Amazon’s prices are no longer random.
Conference Papers
- Ginseng: Market-Driven Memory Allocation, Orna Agmon Ben-Yehuda, Eyal Posener, Muli Ben-Yehuda, Assaf Schuster, Ahuva Mu’alem. In proceedings of VEE 2014.
- The nonkernel: A Kernel Designed for the Cloud Muli Ben-Yehuda, Omer Peleg, Orna Agmon Ben-Yehuda, Igor Smolyar, and Dan Tsafrir. In proceedings of the 4th Asia-Pacific Workshop on Systems (APSYS), 2013.
- The Resource-as-a-Service (RaaS) Cloud, Orna Agmon Ben-Yehuda, Muli Ben-Yehuda, Assaf Schuster, Dan Tsafrir. In proceedings of the 4th USENIX Workshop on Hot Topics in Cloud Computing (HotCloud) 2012. (Acceptance ratio 32%=24/75). bibtex. Interview with Neil Savage in Communications of the ACM, August 2012.
- “ExPERT: Pareto-Efficient Task Replication on Grids and Clouds”, Orna Agmon Ben-Yehuda, Assaf Schuster, Artyom Sharov, Mark Silberstein, Alexandru Iosup. IEEE International Parallel and Distributed Processing Symposium (IPDPS) 2012. (acceptance ratio 21%=118/569).
Keywords: Scheduling; Cloud computing; Provisioning policies; Pareto scheduling; bags of tasks; Empirical performance analysis; Simulation-based scheduling. - Deconstructing Amazon EC2 Spot Instance Pricing, Orna Agmon Ben-Yehuda, Muli Ben-Yehuda, Assaf Schuster, Dan Tsafrir. The 3rd IEEE International Conference on Cloud Computing Technology and Science (CloudCom 2011), Athens, Greece. Acceptance ratio: 24%. bibtex. An extended version appeared in ACM Transactions on Economics and Computation (TEAC).
This paper builds on data from two websites which are no longer active. Their data, however, is still available from SpotWatch and CloudExchange. Caveat emptor: since Amazon introduced a second Linux instance type, the SpotWatch data holds the two price histories together, and they appear like two price bands (or like a wider band, in some cases). Also, since this work first appeared, Amazon radically changed their pricing mechanism, as can be seen on the last slide of the presentation, so prices no longer change according to the mechanism described int he paper. - A 3D Collision Scheme for Compressible Media in a General Connectivity Lagrangian Formulation, Nir Bar-Gill, Orna Agmon, Nadav Har’el and Jonathan Nemirovski, Eighth International Conference on Structures Under Shock and Impact, 2004. Presented at the 7th International Conference on Computational Modelling of Free and Moving Boundary Problems, Albuquerque NM, November 2003.

Orna Agmon Ben-Yehuda, Eyal Posener, Muli Ben-Yehuda, Assaf Schuster, Ahuva Mu’alem
VEE ’14 Proceedings of the 10th ACM SIGPLAN/SIGOPS international conference on Virtual execution environments, 2014
VEE ’14 Proceedings of the 10th ACM SIGPLAN/SIGOPS international conference on Virtual execution environments, 2014
frames are not supported
Posters
- The Resource-as-a-Service (RaaS) Cloud, Orna Agmon Ben-Yehuda, Muli Ben-Yehuda, Assaf Schuster, Dan Tsafrir. HotCloud 2012 and 2nd Technion Computer Engineering (TCE) Conference.
- “ExPERT: Pareto-Efficient Task Replication on Grids and Clouds”, Orna Agmon Ben-Yehuda, Assaf Schuster, Artyom Sharov, Mark Silberstein, Alexandru Iosup. SYSTOR 2011 and 1st Technion Computer Engineering (TCE) Conference. Won the best poster award (tied) in SYSTOR 2011.
Tech Reports
- Ginseng: Market-Driven Memory Allocation, Orna Agmon Ben-Yehuda, Eyal Posener, Muli Ben-Yehuda, Assaf Schuster, Ahuva Mu’alem. Technion CS Technical report CS-2013-07.
- Efficient, Non-Cooperative Sharing of Computing Resources, PhD thesis in computer science, under the supervision of Prof. Assaf Schuster.
- Deconstructing Amazon EC2 Spot Instance Pricing, Orna Agmon Ben-Yehuda, Muli Ben-Yehuda, Assaf Schuster, Dan Tsafrir. Technion CS Technical report CS-2011-09.
- ExPERT: Pareto-Efficient Task Replication on Grids and Clouds, Orna Agmon Ben-Yehuda, Assaf Schuster, Artyom Sharov, Mark Silberstein, Alexandru Iosup. Technion CS Technical report CS-2011-03.
Presentations
- List of Haifux presentations
- The Resource-as-a-Service (RaaS) Cloud, Orna Agmon Ben-Yehuda, Muli Ben-Yehuda, Assaf Schuster, Dan Tsafrir. Microsoft (China), Shanghai, 21/05/2012. Electronic-Commerce Day 2012, 30/05/2012. 12-13/06/2012, HotCloud 2012.
- “ExPERT: Pareto-Efficient Task Replication on Grids and Clouds”, Orna Agmon Ben-Yehuda, Assaf Schuster, Artyom Sharov, Mark Silberstein, Alexandru Iosup. IPDPS 2012. slides in pdf.
- “Deconstructing Amazon EC2 Spot Instance Pricing”, Orna Agmon Ben-Yehuda, Muli Ben-Yehuda, Assaf Schuster, Dan Tsafrir. Haifux, 26/09/2011. slides in pdf. HaifaU, 16/11/2011. CSL Lunch, Technion, 17/11/2011. CloudCom, Athens, 30/11/2011, slides in pdf. Wiezmann Inst., 16/04/2012. Microsoft (China), Shanghai, 21/05/2012. E-commerce seminar, Technion, 10/06/2012.slides in pdf.
- “Anonymity and Privacy”, at Kiryat-Haim high school, 25/09/2011. Slides in pdf and sources in odp.
- “Sharing the Burden: Energy Incentives for Users”, at the 4th Symposium on Future Trends in Service-Oriented Computing, June 2009. Video and slides.
- Incentives and General Welfare Functions in the Off-Line Cluster Scheduling Problem, MSc seminar.
- Lagrange Sliding Colliding Interfaces at Domain Decomposition 18.
Teaching
I am offering several projects on RaaS together with Assaf Schuster, under either Course 236371 (project in Concurrent and Distributed Systems) or Course 236366 (project in operating systems).
Students
- Liran Funaro
- Boris Pismenny
Past Students
- Eyal Posener (Advised by Assaf Schuster): Dynamic Memory Allocation in Cloud Computers using Progressive Second Price Auction
Seminar Presentations
- Erez Petrank’s seminar – odp (the only format which captures the presentation without bugs), pdf, and ppt – Syncronization Coverage.
- Assaf Schuster’s seminar – communication efficient online detection_of network wide anomalies – pdf, odp.
- Dan Tsafrir’s seminar – Difference Engine – pdf.
Community Service
- One of the managers of Haifux, the Haifa Linux Club.
- PC member of SC 2014 (posters), IPDPS 2014 (applications) , SC 2013 (posters, IPDPS 2013, SPSN 2011.
- Reviewer for IEEE Transactions on Parallel and Distributed Systems (TPDS) and IEEE Transactions on Cloud Computing (TCC).
- PC Chair of August Penguin 4, 2005.
- Sub-reviewer for VEE 2014, HotCloud 2013, RESoLVE 2013, VEE 2013, FAST 2013, Eurosys 2012, SC 2011, USENIX ATC 2011, ICS 2010, HotCloud 2010.
Free Software
- Spotprice: A matlab simulator that creates price traces according to our understanding of Amazon EC2’s algorithm in the past and present.
- A dynamic memory memcached: memcached that can kill memory slabs to free mmeory, and change its target memory on the fly. On Github.
- make_site: A package for creating static web pages with menu, using css and tables. Used by haifux.org.