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Data"],"published-print":{"date-parts":[[2025,12,4]]},"abstract":"<jats:p>\n                    Distributed data management systems employ data sharding techniques to achieve scalability. Traditional sharding approaches typically operate under the assumption of a trusted environment, where nodes may crash,but do not act adversarially. In untrustworthy environments, however, this assumption is no longer valid. This paper presents M\n                    <jats:sc>arlin,<\/jats:sc>\n                    an adaptive scalable data management system specifically designed for untrustworthy environments. M\n                    <jats:sc>arlin<\/jats:sc>\n                    leverages data sharding to enhance scalability while dynamically redistributing data across clusters to adapt to dynamic workloads. We propose two architectures: a centralized architecture serving as a baseline, which employs hypergraph partitioning within a trusted administrative domain, and a decentralized architecture that eliminates the need for such a trusted domain by managing shards across nodes in a decentralized manner. Both architectures utilize real-time monitoring and adaptive algorithms to dynamically adjust sharding in response to workload characteristics and adversarial conditions. Experimental results show that M\n                    <jats:sc>arlin<\/jats:sc>\n                    maintain consistent performance under diverse dynamic scenarios in untrustworthy environments by continuously optimizing shard distributions.\n                  <\/jats:p>","DOI":"10.1145\/3769756","type":"journal-article","created":{"date-parts":[[2025,12,6]],"date-time":"2025-12-06T04:32:13Z","timestamp":1764995533000},"page":"1-28","source":"Crossref","is-referenced-by-count":0,"title":["Adaptive Sharding in Untrusted Environments"],"prefix":"10.1145","volume":"3","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9907-0919","authenticated-orcid":false,"given":"Bhavana","family":"Mehta","sequence":"first","affiliation":[{"name":"University of Pennsylvania, Philadelphia, PA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-1398-8045","authenticated-orcid":false,"given":"Nupur","family":"Baghel","sequence":"additional","affiliation":[{"name":"University of Pennsylvania, Philadelphia, PA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6220-8363","authenticated-orcid":false,"given":"Mohammad Javad","family":"Amiri","sequence":"additional","affiliation":[{"name":"Stony Brook University, Stony Brook, NY, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4757-1746","authenticated-orcid":false,"given":"Boon Thau","family":"Loo","sequence":"additional","affiliation":[{"name":"University of Pennsylvania, Philadelphia, PA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1279-1124","authenticated-orcid":false,"given":"Ryan","family":"Marcus","sequence":"additional","affiliation":[{"name":"University of Pennsylvania, Philadelphia, PA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"320","published-online":{"date-parts":[[2025,12,5]]},"reference":[{"key":"e_1_2_1_1_1","unstructured":"[n.d.]. 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