Elijah Grubb

I am a first year Ph.D. student in the Computer Science Department at the University of Maryland, College Park. My interests broadly involve security, systems, programming languages, and cryptography.

I received my undergraduate degree in Computer Science at the University of Utah. There I was a member of the Flux Research Group in the School of Computing working with Professor Eric Eide. Previously, I worked with Professor Feifei Li as a part of the Data Group.


Supporting Docker in Emulab-Based Network Testbeds.
D. Johnson, E. Grubb, E. Eide.
In Proc. of the 11th USENIX Workshop on Cyber Security Experimentation and Test (CSET 18).
Researchers conduct experiments in a variety of computing environments, including dedicated testbeds and commercial clouds, and they need convenient mechanisms for deploying their software within these disparate platforms. To address this need, we have extended Emulab so that it can instantiate and configure container-based virtual devices using Docker images. Docker is a de facto standard for packaging and deploying software in cloud environments; now, researchers can use Docker to package and deploy software within Emulab-based testbeds as well. We describe how Emulab incorporates Docker and how it extends Docker images to support the interactivity that researchers expect within a testbed. We show that Emulab can use many popular Docker images to create testbed experiments. We expect that Emulab's support for Docker will make it easier for researchers to move their activities freely, both into the testbed and out into production.
@inproceedings {Johnson+:cset18,
	author = {David Johnson and Elijah Grubb and Eric Eide},
	title = {Supporting Docker in Emulab-Based Network Testbeds},
	booktitle = {11th {USENIX} Workshop on Cyber Security Experimentation and Test ({CSET} 18)},
	year = {2018},
	month = {August},
	address = {Baltimore, MD},
	url = {https://www.usenix.org/conference/cset18/presentation/johnson},
	publisher = {{USENIX} Association},

Past research projects

As a part of the Xsmith project, I built a framework for testing the modern state of volatiles in C compilers. Published 10 years ago, Volatiles Are Miscompiled, and What to Do about It shed some fascinating light on the surprisingly dismal state of volatiles in production compilers. My goal is to evaluate how compilers and tools for testing compilers have changed over the past decade with regard to volatiles. Has the situation become better? Or maybe volatiles aren't as important as previously thought?

Project Link
Code Link

Worked to help bring Docker support to Emulab's unique system design. Tested ways to use the lightweight container capabilities of Docker while retaining Emulab's key debugging features and smooth deployment capabilities. Implemented support for Alpine Linux images inside of Emulab. Publication describing process has been accepted to CSET 18.

Project Link

Within the SONAR project, worked on data import, which includes bringing in large amounts of data from twitter, building a generic import function into the application to let others upload their own spatio-temporal data and researching data deduplication methods.

Within the election project, worked on taking collecting data store of tweets and running them through systems to find political tweets and assign them to their appropriate county based on location, then pushing them to database.

Project Link

Outside of Computer Science

I love soccer. I had season tickets to RSL when I lived in Utah and spend most weekends watching English, German, Spanish, Italian or maybe even French footy.
The Utah Jazz are my only team worth talking about right now.
I'm in denial about what the Chargers and Braves are currently doing.
I played tennis in high school. Still love to watch the Grand Slam tournaments.
Go Sharks!
Utah rules BYU drools.
Cryptonomicon Neal Stephenson IP
We Are Legion (We Are Bob) Dennis Taylor IP
Bad Blood John Carreyrou
Sometimes I Lie Alice Feeney
Dark Matter Blake Crouch
The Long Way to a Small, Angry Planet Becky Chambers
Ready Player One Ernest Cline
The Martian Andy Weir
Masters of Doom David Kushner
Steve Jobs Walter Isaacson
Living in Utah for 20+ years gave me convenient access to some of the most beautiful places in the United States.
I have had the opportunity to visit, often several times, many national parks including: Bryce Canyon, Zion, Arches, Grand Canyon, Mesa Verde, Badlands, Wind Cave, Yellowstone, Sequoia, Kings Canyon, Death Valley, Redwood, and Yosemite.
Looking forward to exploring Shenandoah National Park soon!