George Amvrosiadis
Assistant Research Professor
Electrical and Computer Engineering


Gates Center for Computer Science
5000 Forbes Ave, Room 9008
Carnegie Mellon University, Pittsburgh, PA 15213

gamvrosi (at) cmu (dot) edu
george (at) amvrosiadis (dot) com


Systems researchers:
click to submit your work to the Software-Defined Data Computing and Storage workshop (co-located with ACM ASPLOS) by January 25th!


ML/Systems researchers:
click to submit your work to the first workshop on Machine Learning for Computing Systems (co-located with ACM HPDC) by April 9th!


I am a member of the faculty in the department of Electrical and Computer Engineering at Carnegie Mellon University. My research interests lie in the areas of:
  • Scalable storage performance and reliability;
  • Operating and distributed systems;
  • Data analysis and modeling
My current primary research objectives are:
  • Reimagine file systems as transient, light-weight services that applications can instantiate, scale, and optimize on-demand. The goal is to propose a (timely!) alternative to parallel file systems with fully synchronous namespaces, which will remain performant as we transition to exascale systems and beyond.

  • Develop efficient mechanisms that turn the OS into a gray box. A step in that direction is Duet [4], a framework that notifies processes when data of interest becomes cache-resident. This allows groups of processes with overlapping data accesses to adjust their workflows in order to improve their collective efficiency. Duet has been used to improve the efficiency of maintenance tasks [4], job schedulers [5], and file system monitoring tools [1].

  • Discover and fix pain points in systems through data analysis and modeling of field data. Some examples: improving the reliability of enterprise backup systems [2, 5], characterizing the effect of temperature on the reliability of datacenter hardware [6, 8], and mitigating the impact of maintenance work by predicting when a storage device is expected to be idle [7].
I've also been lucky to serve the community from the following posts:




Publications

  1. "Software-Defined Storage for Fast Trajectory Queries using a DeltaFS Indexed Massive Directory",
    Q. Zheng, G. Amvrosiadis, S. Kadekodi, G. Gibson, C. Cranor, B. Settlemyer, G. Grider, F. Guo.
    In Proc. of 2nd Joint International Workshop on Parallel Data Storage & Data Intensive Scalable Computing Systems (PDSW-DISCS), November 2017.



  2. "Unobtrusive Storage Maintenance",
    G. Amvrosiadis
    Doctoral Dissertation, University of Toronto, August 2016.



  3. "Getting Back Up: Understanding How Enterprise Data Backups Fail",
    G. Amvrosiadis, M. Bhadkamkar.
    In Proc. of the 2016 USENIX Annual Technical Conference (ATC), June 2016. (Acc.Rate: 19%)



  4. "Quartet: Harmonizing task scheduling and caching for cluster computing",
    F. Deslauriers, P. McCormick, G. Amvrosiadis, A. Goel, A. Demke Brown.
    In Proc. of the 8th USENIX Workshop on Hot Topics in Storage and File Systems (HotStorage '16), June 2016.



  5. "Opportunistic Storage Maintenance",
    G. Amvrosiadis, A. Demke Brown, A. Goel.
    In Proc. of the 25th Symposium on Operating Systems Principles (SOSP), October 2015. (Acc.Rate: 16%)



  6. "Identifying Trends in Data Protection Systems",
    G. Amvrosiadis, M. Bhadkamkar.
    In Proc. of the 2015 USENIX Annual Technical Conference (ATC), July 2015. (Acc.Rate: 20%)



  7. "Temperature Management in Datacenters: Cranking Up the Thermostat Without Feeling the Heat" ,
    N. El-Sayed, I. Stefanovici, G. Amvrosiadis, A. Hwang, B. Schroeder.
    In USENIX ;login:, Volume 38, No. 1, February 2013.



  8. "Practical Scrubbing: Getting to the bad sector, at the right time",
    G. Amvrosiadis, A. Oprea, B. Schroeder.
    In Proc. of the 42nd Annual IEEE/IFIP International Conference on Dependable Systems and Networks, Dependable Computing and Communication Symposium (DSN/DCCS), July 2012. Highest ranked in conference! (Acc.Rate: 17%)



  9. "Temperature Management in Data Centers: Why Some (Might) Like It Hot",
    N. El-Sayed, I. Stefanovici, G. Amvrosiadis, A. Hwang, B. Schroeder.
    In Proc. of the Joint 40th International Conference on Measurement and Modeling of Computer Systems and IFIP WG 7.3 Conference on Computer Performance Modeling and Analysis (SIGMETRICS/Performance), June 2012. Best Paper Award! (Acc. Rate: 15%)



  10. "Namespace Management in Federated Filesystems",
    G. Amvrosiadis, S. Anastasiadis. Undergraduate Thesis, June 2009.

Teaching

Advanced Cloud Computing (18-847B/15-719)
Carnegie Mellon University
Spring 2018
Storage Systems (18-746/15-746)
Carnegie Mellon University
Fall 2016 Fall 2017


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Based on code by the Polymer Project, Faiz Malkani