{"id":"https://openalex.org/W2914647432","doi":"https://doi.org/10.1109/tnet.2019.2891008","title":"U<sup>2</sup>-Tree: A Universal Two-Layer Distributed Indexing Scheme for Cloud Storage System","display_name":"U<sup>2</sup>-Tree: A Universal Two-Layer Distributed Indexing Scheme for Cloud Storage System","publication_year":2019,"publication_date":"2019-01-25","ids":{"openalex":"https://openalex.org/W2914647432","doi":"https://doi.org/10.1109/tnet.2019.2891008","mag":"2914647432"},"language":"en","primary_location":{"id":"doi:10.1109/tnet.2019.2891008","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tnet.2019.2891008","pdf_url":null,"source":{"id":"https://openalex.org/S62238642","display_name":"IEEE/ACM Transactions on Networking","issn_l":"1063-6692","issn":["1063-6692","1558-2566"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE/ACM Transactions on Networking","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5019439900","display_name":"Xiaofeng Gao","orcid":"https://orcid.org/0000-0003-1776-8799"},"institutions":[{"id":"https://openalex.org/I183067930","display_name":"Shanghai Jiao Tong University","ror":"https://ror.org/0220qvk04","country_code":"CN","type":"education","lineage":["https://openalex.org/I183067930"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Xiaofeng Gao","raw_affiliation_strings":["Shanghai Key Laboratory of Scalable Computing and Systems, Shanghai Jiao Tong University, Shanghai, China"],"raw_orcid":"https://orcid.org/0000-0003-1776-8799","affiliations":[{"raw_affiliation_string":"Shanghai Key Laboratory of Scalable Computing and Systems, Shanghai Jiao Tong University, Shanghai, China","institution_ids":["https://openalex.org/I183067930"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5039774846","display_name":"Yuanning Gao","orcid":"https://orcid.org/0000-0002-9072-1084"},"institutions":[{"id":"https://openalex.org/I183067930","display_name":"Shanghai Jiao Tong University","ror":"https://ror.org/0220qvk04","country_code":"CN","type":"education","lineage":["https://openalex.org/I183067930"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Yuanning Gao","raw_affiliation_strings":["Shanghai Key Laboratory of Scalable Computing and Systems, Shanghai Jiao Tong University, Shanghai, China"],"raw_orcid":"https://orcid.org/0000-0002-9072-1084","affiliations":[{"raw_affiliation_string":"Shanghai Key Laboratory of Scalable Computing and Systems, Shanghai Jiao Tong University, Shanghai, China","institution_ids":["https://openalex.org/I183067930"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100611386","display_name":"Yichen Zhu","orcid":"https://orcid.org/0000-0003-3614-1537"},"institutions":[{"id":"https://openalex.org/I183067930","display_name":"Shanghai Jiao Tong University","ror":"https://ror.org/0220qvk04","country_code":"CN","type":"education","lineage":["https://openalex.org/I183067930"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Yichen Zhu","raw_affiliation_strings":["Shanghai Key Laboratory of Scalable Computing and Systems, Shanghai Jiao Tong University, Shanghai, China"],"raw_orcid":"https://orcid.org/0000-0003-3614-1537","affiliations":[{"raw_affiliation_string":"Shanghai Key Laboratory of Scalable Computing and Systems, Shanghai Jiao Tong University, Shanghai, China","institution_ids":["https://openalex.org/I183067930"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5100428808","display_name":"Guihai Chen","orcid":"https://orcid.org/0000-0002-6934-1685"},"institutions":[{"id":"https://openalex.org/I183067930","display_name":"Shanghai Jiao Tong University","ror":"https://ror.org/0220qvk04","country_code":"CN","type":"education","lineage":["https://openalex.org/I183067930"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Guihai Chen","raw_affiliation_strings":["Shanghai Key Laboratory of Scalable Computing and Systems, Shanghai Jiao Tong University, Shanghai, China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Shanghai Key Laboratory of Scalable Computing and Systems, Shanghai Jiao Tong University, Shanghai, China","institution_ids":["https://openalex.org/I183067930"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":4,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.5579,"has_fulltext":false,"cited_by_count":5,"citation_normalized_percentile":{"value":0.68839908,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":"27","issue":"1","first_page":"201","last_page":"213"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11478","display_name":"Caching and Content Delivery","score":0.9998000264167786,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11478","display_name":"Caching and Content Delivery","score":0.9998000264167786,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10101","display_name":"Cloud Computing and Resource Management","score":0.9997000098228455,"subfield":{"id":"https://openalex.org/subfields/1710","display_name":"Information Systems"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10742","display_name":"Peer-to-Peer Network Technologies","score":0.9987000226974487,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/search-engine-indexing","display_name":"Search engine indexing","score":0.801415741443634},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.7460724711418152},{"id":"https://openalex.org/keywords/tree","display_name":"Tree (set theory)","score":0.5922219157218933},{"id":"https://openalex.org/keywords/index","display_name":"Index (typography)","score":0.5616849064826965},{"id":"https://openalex.org/keywords/data-mining","display_name":"Data mining","score":0.5249497890472412},{"id":"https://openalex.org/keywords/network-topology","display_name":"Network topology","score":0.5200902223587036},{"id":"https://openalex.org/keywords/bloom-filter","display_name":"Bloom filter","score":0.5082137584686279},{"id":"https://openalex.org/keywords/cloud-computing","display_name":"Cloud computing","score":0.46870583295822144},{"id":"https://openalex.org/keywords/information-retrieval","display_name":"Information retrieval","score":0.38466042280197144},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.33748388290405273},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.32010897994041443},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.1551699936389923},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.15127897262573242},{"id":"https://openalex.org/keywords/world-wide-web","display_name":"World Wide Web","score":0.08720800280570984}],"concepts":[{"id":"https://openalex.org/C75165309","wikidata":"https://www.wikidata.org/wiki/Q2258979","display_name":"Search engine indexing","level":2,"score":0.801415741443634},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7460724711418152},{"id":"https://openalex.org/C113174947","wikidata":"https://www.wikidata.org/wiki/Q2859736","display_name":"Tree (set theory)","level":2,"score":0.5922219157218933},{"id":"https://openalex.org/C2777382242","wikidata":"https://www.wikidata.org/wiki/Q6017816","display_name":"Index (typography)","level":2,"score":0.5616849064826965},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.5249497890472412},{"id":"https://openalex.org/C199845137","wikidata":"https://www.wikidata.org/wiki/Q145490","display_name":"Network topology","level":2,"score":0.5200902223587036},{"id":"https://openalex.org/C147224247","wikidata":"https://www.wikidata.org/wiki/Q885373","display_name":"Bloom filter","level":2,"score":0.5082137584686279},{"id":"https://openalex.org/C79974875","wikidata":"https://www.wikidata.org/wiki/Q483639","display_name":"Cloud computing","level":2,"score":0.46870583295822144},{"id":"https://openalex.org/C23123220","wikidata":"https://www.wikidata.org/wiki/Q816826","display_name":"Information retrieval","level":1,"score":0.38466042280197144},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.33748388290405273},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.32010897994041443},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.1551699936389923},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.15127897262573242},{"id":"https://openalex.org/C136764020","wikidata":"https://www.wikidata.org/wiki/Q466","display_name":"World Wide Web","level":1,"score":0.08720800280570984},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.0},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/tnet.2019.2891008","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tnet.2019.2891008","pdf_url":null,"source":{"id":"https://openalex.org/S62238642","display_name":"IEEE/ACM Transactions on Networking","issn_l":"1063-6692","issn":["1063-6692","1558-2566"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE/ACM Transactions on Networking","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[{"id":"https://openalex.org/G4210069718","display_name":"\u9762\u5411\u7fa4\u667a\u611f\u77e5\u7684\u7f51\u7edc\u5e02\u573a\u673a\u5236\u8bbe\u8ba1\u539f\u7406\u7814\u7a76\u4e0e\u5b9e\u73b0","funder_award_id":"61672353","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G5010798040","display_name":null,"funder_award_id":"61872238","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"}],"funders":[{"id":"https://openalex.org/F4320321001","display_name":"National Natural Science Foundation of China","ror":"https://ror.org/01h0zpd94"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":43,"referenced_works":["https://openalex.org/W207861703","https://openalex.org/W1491689600","https://openalex.org/W1520491428","https://openalex.org/W1543942291","https://openalex.org/W1583378284","https://openalex.org/W1976686141","https://openalex.org/W1998471240","https://openalex.org/W2020572986","https://openalex.org/W2026317040","https://openalex.org/W2037959956","https://openalex.org/W2056521113","https://openalex.org/W2058135584","https://openalex.org/W2111216043","https://openalex.org/W2123016589","https://openalex.org/W2123376415","https://openalex.org/W2123845384","https://openalex.org/W2126210439","https://openalex.org/W2130531694","https://openalex.org/W2136986825","https://openalex.org/W2137793678","https://openalex.org/W2142753649","https://openalex.org/W2143065961","https://openalex.org/W2153946118","https://openalex.org/W2157614013","https://openalex.org/W2163769126","https://openalex.org/W2165329839","https://openalex.org/W2182859693","https://openalex.org/W2185334818","https://openalex.org/W2290568203","https://openalex.org/W2294932343","https://openalex.org/W2345088588","https://openalex.org/W2405554247","https://openalex.org/W2503581028","https://openalex.org/W4230992113","https://openalex.org/W4232093111","https://openalex.org/W4235670058","https://openalex.org/W4237515752","https://openalex.org/W4247842874","https://openalex.org/W4297816311","https://openalex.org/W6608550380","https://openalex.org/W6632490965","https://openalex.org/W6684402220","https://openalex.org/W6686648421"],"related_works":["https://openalex.org/W2086572746","https://openalex.org/W2604468458","https://openalex.org/W2157216338","https://openalex.org/W1662107788","https://openalex.org/W121740227","https://openalex.org/W2135966669","https://openalex.org/W2732769800","https://openalex.org/W3082379938","https://openalex.org/W2924589531","https://openalex.org/W2594143027"],"abstract_inverted_index":{"The":[0],"indices":[1,41,49],"in":[2,50,200],"cloud":[3],"storage":[4],"systems":[5],"manage":[6],"the":[7,17,21,25,51,54,59,102,124,132,164,167,188,201,210,216,228],"stored":[8],"data":[9,94,115,176],"and":[10,58,150,173,195,215,230,245],"support":[11],"diverse":[12],"queries":[13,32],"efficiently.":[14],"Secondary":[15],"index,":[16],"index":[18,56,61,112,126,158,161,169,211,213],"built":[19,92],"on":[20,66,71,93,131,249],"attributes":[22],"other":[23],"than":[24],"primary":[26],"key,":[27],"facilitates":[28],"a":[29,72,86,240],"variety":[30],"of":[31,39,123,135,187,191,203,219,232,242],"for":[33,127],"different":[34],"purposes.":[35],"An":[36],"efficient":[37],"design":[38],"secondary":[40],"is":[42],"called":[43],"two-layer":[44,67,88,204],"indexing":[45,68,90,121,205],"scheme.":[46,206],"It":[47],"divides":[48],"system":[52],"into":[53],"global":[55,125,160,168],"layer":[57],"local":[60,111,136,157],"layer.":[62],"However,":[63],"previous":[64],"works":[65],"are":[69],"mainly":[70],"P2P":[73],"overlay":[74],"network.":[75],"In":[76,163,181],"this":[77],"paper,":[78],"we":[79,108,140,184,208,226],"propose":[80],"U":[81,103,220,233],"<sup":[82,104,221,234],"xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"":[83,105,222,235],"xmlns:xlink=\"http://www.w3.org/1999/xlink\">2</sup>":[84,106,223,236],"-Tree,":[85,107],"universal":[87],"distributed":[89],"scheme":[91],"center":[95],"networks":[96],"with":[97],"tree-like":[98,192],"topologies.":[99],"To":[100],"construct":[101],"first":[109],"build":[110],"according":[113],"to":[114,153,159,178],"features":[116],"and,":[117],"then,":[118],"assign":[119],"potential":[120],"range":[122],"each":[128],"host":[129],"based":[130],"distribution":[133],"rule":[134],"data.":[137],"After":[138],"that,":[139],"use":[141],"several":[142],"false":[143],"positives":[144],"control":[145],"techniques,":[146],"including":[147],"gap":[148],"elimination":[149],"Bloom":[151],"filter,":[152],"publish":[154],"meta-data":[155],"about":[156],"host.":[162],"final":[165],"step,":[166],"collects":[170],"published":[171],"information":[172],"uses":[174],"tree":[175],"structures":[177],"organize":[179],"them.":[180],"our":[182],"design,":[183],"take":[185],"advantage":[186],"topological":[189],"properties":[190],"topologies,":[193],"introduce":[194],"compare":[196],"detailed":[197],"optimization":[198],"techniques":[199],"construction":[202],"Furthermore,":[207],"discuss":[209],"updating,":[212],"tuning,":[214],"fault":[217],"tolerance":[218],"-Tree.":[224],"Finally,":[225],"validate":[227],"effectiveness":[229],"efficiency":[231],"-Tree":[237],"by":[238],"giving":[239],"series":[241],"theoretical":[243],"analyses":[244],"conducting":[246],"numerical":[247],"experiments":[248],"Amazon":[250],"EC2":[251],"platform.":[252]},"counts_by_year":[{"year":2023,"cited_by_count":2},{"year":2022,"cited_by_count":1},{"year":2021,"cited_by_count":1},{"year":2019,"cited_by_count":1}],"updated_date":"2026-06-11T09:08:48.828518","created_date":"2025-10-10T00:00:00"}