UChicago systems research on
Availability, Reliability and Efficiency
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  • We are recruiting graduate students! If you are interested in our projects, please contact Haryadi Gunawi. We are also open to local undergraduate students who would like to perform undergraduate research / independent study (local means you are enrolled in our CS department).

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Publication and Download Links

For a complete list, please go to our publications page.

Project/download links: FEMU, tinyTailFlash, SAMC, Cloud Bug Study (CBS)


The "Cloud" era is here. As more and more computing tasks depend on cloud computing, the availability, reliability, and efficiency of cloud-scale systems are becoming more and more important. Unfortunately, major dependability problems (outages, data loss, etc.) still take place even recently. To sum up, today's computing forecast is "cloudy with a chance of failure."

In UCARE lab (U of C systems research on Availability, Reliability and Efficiency), we are improving the dependability of storage and cloud-scale distributed systems in the context of (1) performance stability, specifically on the handling and management of "limpware", (2) reliability, specifically on combating distributed concurrency bugs, and (3) scalability, specifically about finding and reproducing latent scalability bugs easily.


We would like to thank:

  • National Science Foundation, Grants# CNS-1350499, CCF-1336580, and CCF-1321958
  • CERES: Center for Unstoppable Computing
  • EMC
  • Google
  • Huawei
  • NetApp
  • Facebook/Meta
  • Seagate

  • Infrastructures: