Manya Ghobadi

Email: ghobadi at csail dot mit dot edu

Office: 32 Vassar Street, Cambridge, G940

Research Interests

Large-Scale Reconfigurable Networks

High-Performance Cloud Infrastructure

Networks for Machine Learning

Hardware-Software Co-design

Data Center Networks

Network Optimization

Optical Networks


Fall 2020, 2019: 6.829 Computer Networks

Spring 2020, 2019: 6.033 System Engineering

Spring 2021: 6.009 Fundamentals of Programming


TIBCO Career Development Assistant Professor
Computer Science & Artificial Intelligence Laboratory
Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology



BOW: First Real-World Demonstration of a Bayesian Optimization System for Wavelength Reconfiguration
(Postdeadline Paper)
Z. Zhong, M. Ghobadi, M. Balandat, S. Katti, A. Kazerouni, J. Leach, M. McKillop, Y. Zhang
OFC 2021
[paper] [slides] [code]

ARROW: Restoration-Aware Traffic Engineering
Z. Zhong, M. Ghobadi, A. Khaddaj, J. Leach, Y. Xia, Y. Zhang

SiP-ML: High-Bandwidth Optical Network Interconnects for Machine Learning Training
M. Khani, M Ghobadi, M. Alizadeh, Z. Zhu, M. Glick, K. Bergman, A. Vahdat, B. Klenk, E. Ebrahimi

In-network Aggregation for Shared Machine Learning Clusters (Best Paper Award)
N. Gebara, P. Costa, M. Ghobadi
MLSYS 2021
[paper] [slides]

A Social Network Under Social Distancing: Risk-Driven Backbone Management During COVID-19 and Beyond
Y. Xia, Y. Zhang, Z. Zhong, G. Yan, C. L. Lim, S. S. Ahuja, S. Bali, A. Nikolaidis, K. Ghobadi, M. Ghobadi

Challenging the Stateless Quo of Programmable Switches
N. Gebara, A. Lerner, M. Yang, M. Yu, P. Costa, M. Ghobadi
ACM HotNets 2020

PINE: Photonic Integrated Networked Energy efficient datacenters (ENLITENED Program) [Invited]
M. Glick, N. C. Abrams, Q. Cheng, M. Teh, Y. Hung, O. Jimenez, S. Liu, Y. Okawachi, X. Meng, L. Johansson, M. Ghobadi, L. Dennison, G. Michelogiannakis, J. Shalf, A. Liu, J. Bowers, A. Gaeta, M. Lipson, and K. Bergman
Journal of Optical Communications and Networking, 2020

Photonic Memory Disaggregation in Datacenters
J. Shalf, G. Michelogiannakis, B. Austin, T. Groves, M. Ghobadi, L. Dennison, T. Gray, M. Glick, K. Bergman
OSA Advanced Photonics Congress 2020

On the Complexity of Traffic Traces and Implications
C. Avin, M. Ghobadi, K. Griner, S. Schmid

Enabling Programmable Transport Protocols in High-Speed NICs
M. T. Arashloo, A. Lavrov, M. Ghobadi, J. Rexford, D. Walker, D. Wentzlaff

OptFlow: A Flow-based Abstraction for Programmable Topologies
K. Foerster, L. Luo, M. Ghobadi

Active Learning in Undergraduate Computer Systems: Before and After the COVID-19 Pandemic
K. LaCurts, M. Ghobadi, K. Sollin
SIGCOMM Education Workshop 2020

FAB: Toward Flow-aware Buffer Sharing on Programmable Switches
M. Apostolaki, L. Vanbever, M. Ghobadi
Buffer Sizing Workshop 2019
[paper] [slides]

FlexEnt: Entropy Coding to Curb Stragglers in Large-Scale Distributed Machine Learning
J. Salamy, A. Sharma, M. Ghobadi, M. Medard
SOSP's AI Systems Workshop 2019
[paper] [poster]

TeaVaR: Striking the Right Utilization-Availability Balance in WAN Traffic Engineering
J. Bogle, N. Bhatia, M. Ghobadi, I. Menache, N. Bjorner, A. Valadarsky, M. Schapira
[paper] [slides] [code] [live demo] [poster] [press]

Bandwidth Steering for HPC using Silicon Nanophotonics
G. Michelogiannakis, Y. Shen, M. Y. Teh, X. Meng, B. Aivazi, T. Groves, J. Shalf, M. Glick, M. Ghobadi, L. Dennison, K. Bergman
ACM/IEEE Supercomputing Conference'19

RADWAN: Rate Adaptive Wide Area Network
R. Singh, M. Ghobadi, K. Foerster, M. Filer, P. Gill
[paper] [slides]

Characterizing the Algorithmic Complexity of Reconfigurable Data Center Architectures
K. Foerster, M. Ghobadi, S. Schmid
[paper] [slides]

Beyond SmartNICs: Towards a Fully Programmable Cloud
A. Caulfield, P. Costa, M. Ghobadi
IEEE High Performance Switching and Routing'18

PINE: An Energy Efficient Flexibly Interconnected Photonic Data Center Architecture for Extreme Scalability
K. Bergman, J. Shalf, G. Michelogiannakis, S. Rumley, L. Dennison, M. Ghobadi
IEEE Optical Interconnects'18

Understanding and Mitigating Packet Corruption in Data Center Networks
D. Zhuo, M. Ghobadi, R. Mahajan, K. Foerster, A. Krishnamurthy, T. Anderson

RAIL: A Case for Redundant Arrays of Inexpensive Links in Data Center Networks
D. Zhuo, M. Ghobadi, R. Mahajan, A. Phanishayee, X. K. Zou, H. Guan, A. Krishnamurthy, T. Anderson

Run, Walk, Crawl: Towards Dynamic Link Capacities
R. Singh, M. Ghobadi, K. Foerster, M. Filer, P. Gill
ACM HotNets'17
[paper][HotNets dialogue] [press]

HotCocoa: Hardware Congestion Control Abstractions
M. T. Arashloo, M. Ghobadi, J. Rexford, D. Walker
ACM HotNets'17

Optical Layer Failures in a Large Backbone (Best dataset award)
M. Ghobadi, R. Mahajan

ProjecToR: Agile Reconfigurable Data Center Interconnect
M. Ghobadi, R. Mahajan, A. Phanishayee, N. Devanur, J. Kulkarni, G. Ranade, P. Blanche, H. Rastegarfar, M. Glick, D. Kilper
[paper] [slides.pdf][slides.pptx][Disco Ball tech. report]

ECN or Delay: Lessons Learnt from Analysis of DCQCN and TIMELY (Best Paper Award Finalist)
Y. Zhu, M. Ghobadi, V. Misra, J. Padhye

Evaluation of Elastic Modulation Gains in Microsoft's Optical Backbone in North America
M. Ghobadi, J. Gaudette, R. Mahajan, A. Phanishayee, B. Klinkers, D. Kilper
Optical Fiber Communication Conference (OFC)'16

Elastic Optical Networking in the Microsoft Cloud
M. Filer, J. Gaudette, M. Ghobadi, R. Mahajan, T. Issenhuth, B. Klinkers, J. Cox
Journal of Optical Communications and Networking (JOCN)'16

TIMELY: RTT-based Congestion Control for the Datacenter
R. Mittal, V. Lam, N. Dukkipati, E. Blem, H. Wassel, M. Ghobadi, A. Vahdat, Y. Wang, D. Wetherall, D. Zats
[paper][public review][code]

Efficient Traffic Splitting on Commodity Switches
N. Kang, M. Ghobadi, J. Reumann, A. Shraer, J. Rexford

TCP Pacing in Data Center Networks
M. Ghobadi, Y. Ganjali
IEEE Hot Interconnects'13

Trickle: Rate Limiting YouTube Video Streaming (Google Research Excellent Paper Award)
M. Ghobadi, Y. Cheng, A. Jain, M. Mathis
[paper][slides] [demo]

Rethinking End-to-End Congestion Control in Software-Defined Networks
M. Ghobadi, S. Yeganeh, Y. Ganjali
ACM HotNets'12

Caliper: Precise and Responsive Traffic Generator
M. Ghobadi, G. Salmon, Y. Ganjali, M. Labrecque, G. Steffan
IEEE Hot Interconnects'12

Proportional Rate Reduction for TCP (Google Research Excellent Paper Award)
N. Dukkipati, M. Mathis, Y. Cheng, M. Ghobadi

OpenTM: Traffic Matrix Estimator for OpenFlow Networks
A. Tootoonchian, M. Ghobadi, Y. Ganjali
Passive and Active Measurement conference'10

Emulation of Optical PIFO Buffers
H. Rastegarfar, M. Ghobadi, Y. Ganjali

NetThreads: Programming NetFPGA with Threaded Software (2nd Place for Best Project Award)
M. Labrecque, J. Steffan, G. Salmon, M. Ghobadi, Y. Ganjali
NetFPGA Developers Workshop'09

NetFPGA-based Precise Traffic Generation
G. Salmon, M. Ghobadi, Y. Ganjali, M. Labrecque, J. Steffan
NetFPGA Developers Workshop'09
[paper][tech. report][code][documentation]

Experimental study of router buffer sizing (Best Paper Award)
N. Beheshti, Y. Ganjali, M. Ghobadi, N. McKeown, and G. Salmon

Resource Optimization Algorithms for Virtual Private Networks Using the Hose Model
M. Ghobadi, S. Ganti, G. C. Shoja
Computer Networks Journal'08

Performing Time-sensitive Network Experiments
N. Beheshti, Y. Ganjali, M. Ghobadi, J. Naous, N. McKeown, and G. Salmon

Hierarchical Provisioning Algorithm for Virtual Private Networks Using the Hose Model
M. Ghobadi, S. Ganti, G. C. Shoja

Resource Optimization to Provision a Virtual Private Network Using the Hose Model
M. Ghobadi, S. Ganti, G. C. Shoja


Dr. Zhizhen Zhong (Ph.D. Tsinghua University)

Dr. Homa Esfahanizadeh (Ph.D. UCLA, with Muriel Medard)

Dr. Moein Khazraee (Ph.D. UCSD)

Current Students

Alaa Khaddaj (Ph.D.)

Mingran Yang (Ph.D.)

Sudarsanan Rajasekaran (Ph.D.)

Weiyang (Frank) Wang (Ph.D.)

Benoit Pit--Claudel (Ph.D., with Muriel Medard)


Jeremy Bogle (M.Eng. 2019, now at Apple, Thesis: A Fundamental Approach for Providing Service-Level Guarantees for Wide-Area Networks)

Ayush Sharma (M.Eng. 2020, Thesis: Aikido: Toward Straggler Mitigation for Distributed Machine Learning Training in Cloud Data Centers)

Amir Farhat (SuperUROP, Fall 2019 -- Spring 2020, Project: Communication Patterns in Distributed Deep Learning)

Tenzin Ukyab (UROP, Fall 2019 -- Spring 2020)

Professional Activities

Program Chair, ACM SIGCOMM Workshop on Optical Systems (OptSys), 2021

Program Committee, ACM SOSP, 2021

Program Committee, USENIX OSDI, 2021

Co-chair, Optics and Machine Learning Symposium, OFC, 2021

Program Committee, USENIX NSDI, 2021

Program Committee, OFC, 2021

Workshops Chair, ACM SIGCOMM, 2020

Program Committee, ACM SIGCOMM, 2020

Program Committee, USENIX NSDI, 2020

Program Committee, USENIX ATC, 2020

Program Committee, ACM HotNets, 2019

Program Committee, ACM SIGCOMM, 2019

Program Chair, New England Network and Systems (NENS), 2019

Program Chair, ACM SIGCOMM Workshop on Optical Systems (OptSys), 2019

Program Committee, USENIX NSDI, 2019

Program Committee, OSA Photonic Networks and Devices, 2018

Program Committee, ACM CoNEXT, 2018

Program Committee, ACM IMC, 2018

Program Committee, ACM HotNets, 2018

Program Committee, ACM SOSR, 2018

General Chair, ACM SOSR, 2018

Program Committee, APNet, 2018

Program Committee, IEEE HPSR, 2018

Program Committee, ACM HotMobile, 2018

Mentoring co-chair, N2Women workshop at ACM SIGCOMM, 2017

Program Committee, ACM SIGCOMM, 2017

Program Committee, ACM IMC, 2017

Program Committee, ACM SOSR, 2017

Program Committee, ACM CoNEXT, 2017

Program Committee, IEEE ICNP, 2017

Program Committee, IEEE/IFICO TMA, 2017

Program Committee, APNet, 2017

Program Committee, PAM, 2017

Program Committee, IEEE MASCOTS, 2017

Program Committee, USENIX NSDI, 2016

Program Committee, ACM CoNEXT, 2016

Program Committee, IEEE Hot Interconnects, 2016

Program Committee, ACM SOSR, 2015

Program Committee, ACM CoNEXT, 2015

Program Committee, IEEE Hot Interconnects, 2015

Program Committee, ACM CoNEXT student workshop, 2013

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