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Archit. Code Optim."],"published-print":{"date-parts":[[2025,9,30]]},"abstract":"<jats:p>In-memory KV stores have recently been migrated from traditional monolithic servers to disaggregated memory (DM) for higher resource utilization and elasticity. These works use replication-based schemes for fault tolerance, which can be replaced with erasure coding (EC) for space efficiency. However, existing EC schemes designed in KV stores on traditional monolithic architectures encounter performance constraints when directly implemented in DM due to the challenges in EC metadata management and consistent parity updating. This article proposes MetaEC, an erasure-coded KV store on DM with high efficiency and resilience. First, for organizing KV pairs to stripes, MetaEC logically forms data chunks and leverages lazy coding to remove the accumulating and coding latency from the critical path. Second, for efficient EC metadata management, MetaEC designs EC metadata structures based on accessing features, and employs a hybrid redundancy schema with deterministic distribution to provide fault tolerance with high storage efficiency. Third, for consistent parity updating, we design a parity updating protocol based on parity logging and co-design EC metadata structures to handle concurrent conflicts by allowing only concurrent reads or writes. Experimental results show that compared with the state-of-the-art replication-based KV stores on DM, MetaEC achieves up to 53.33% latency reduction, up to 31.01% throughput improvement, and 58.17% memory consumption savings.<\/jats:p>","DOI":"10.1145\/3744905","type":"journal-article","created":{"date-parts":[[2025,6,16]],"date-time":"2025-06-16T07:17:43Z","timestamp":1750058263000},"page":"1-26","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["MetaEC: An Efficient and Resilient Erasure-Coded KV Store on Disaggregated Memory"],"prefix":"10.1145","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5747-212X","authenticated-orcid":false,"given":"Qiliang","family":"Li","sequence":"first","affiliation":[{"name":"School of Computer Science and Technology, University of Science and Technology of China","place":["Hefei, China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6142-0186","authenticated-orcid":false,"given":"Min","family":"Lyu","sequence":"additional","affiliation":[{"name":"School of Computer Science and Technology, University of Science and Technology of China","place":["Hefei, China"]},{"name":"Anhui Province Key Laboratory of High Performance Computing","place":["Hefei, China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0004-1585-1665","authenticated-orcid":false,"given":"Tian","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Computer Science and Technology, University of Science and Technology of China","place":["Hefei, China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5202-2795","authenticated-orcid":false,"given":"Liangliang","family":"Xu","sequence":"additional","affiliation":[{"name":"Institute of Mathematics and Interdisciplinary Sciences, Xidian University","place":["Xian, China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-6475-8642","authenticated-orcid":false,"given":"Wei","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Computer Science and Technology, University of Science and Technology of China","place":["Hefei, China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9586-0561","authenticated-orcid":false,"given":"Yinlong","family":"Xu","sequence":"additional","affiliation":[{"name":"School of Computer Science and Technology, University of Science and Technology of China","place":["Hefei, China"]},{"name":"Anhui Province Key Laboratory of High Performance Computing","place":["Hefei, China"]}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"320","published-online":{"date-parts":[[2025,9,19]]},"reference":[{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.1145\/2254756.2254766"},{"key":"e_1_3_3_3_2","doi-asserted-by":"publisher","DOI":"10.1145\/2043556.2043571"},{"key":"e_1_3_3_4_2","unstructured":"Ceph. 2016. 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