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Creators/Authors contains: "Chen, Yiwei"

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  1. ; ; ; ; ; ; ; ; (, USENIX FAST)
    USENIX (Ed.)
    We present Cloudscape, a dataset of nearly 400 cloud archi- tectures deployed on AWS. We perform an in-depth analysis of the usage of storage services in cloud systems. Our findings include: S3 is the most prevalent storage service (68%), while file system services are rare (4%); heterogeneity is common in the storage layer; storage services primarily interface with Lambda and EC2, while also serving as the foundation for more specialized ML and analytics services. Our findings provide a concrete understanding of how storage services are deployed in real-world cloud architectures, and our analysis of the popularity of different services grounds existing research. 
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    Free, publicly-accessible full text available February 25, 2026
  2. ; ; ; ; (, Proceedings of the AAAI Conference on Artificial Intelligence)
    We introduce the Online Preference Reporting and Aggregation (OPRA) system, an open-source online system that aims at providing support for group decision-making. We illustrate OPRA's distinctive features: UI for reporting rankings with ties, comprehensive analytics of preferences, and group decision-making in combinatorial domains. We also discuss our work in an automatic mentor matching system. We hope that the open-source nature of OPRA will foster development of computerized group decision support systems. 
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    Full Text Available 
  3. ; (, Management Science)
    Full Text Available