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Aiming to improve the embedding task, reconfiguration and expansion appear as possible strategies for the service provider. In this work, we explore the management of resources in order to improve the acceptance of requests deciding when and how reconfiguration and expansion shall apply. An exact approach based on integer linear programming along with a heuristic approach is evaluated. Simulation results indicate both reconfiguration and expansion strategies are able to improve the acceptance, but reconfiguration should be considered first as it can provide significant improvements in managing the fragmentation problem. Expansion comes as a secondary decision if necessary.<\/jats:p>","DOI":"10.1177\/0037549717754134","type":"journal-article","created":{"date-parts":[[2018,2,14]],"date-time":"2018-02-14T04:36:46Z","timestamp":1518583006000},"page":"1113-1125","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["Managing virtual network embedding through reconfiguration and expansion"],"prefix":"10.1177","volume":"95","author":[{"given":"Samuel Moreira Abreu","family":"Ara\u00fajo","sequence":"first","affiliation":[{"name":"Department of Computer Science, Federal University of Minas Gerais, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Daniel Ludovico","family":"Guidoni","sequence":"additional","affiliation":[{"name":"Department of Computer Science, Federal University of S\u00e3o Jo\u00e3o del-Rei, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fernanda Sumika Hojo","family":"de Souza","sequence":"additional","affiliation":[{"name":"Department of Computer Science, Federal University of S\u00e3o Jo\u00e3o del-Rei, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Geraldo Robson","family":"Mateus","sequence":"additional","affiliation":[{"name":"Department of Computer Science, Federal University of Minas Gerais, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2018,2,14]]},"reference":[{"key":"bibr1-0037549717754134","first-page":"1","volume-title":"INFOCOM 2006: 25th IEEE international conference on computer communications \u2013 proceedings","author":"Zhu Y"},{"key":"bibr2-0037549717754134","volume-title":"Proceedings of the 2008 ACM CoNEXT conference, CoNEXT \u201808","author":"Zhu Y"},{"key":"bibr3-0037549717754134","doi-asserted-by":"publisher","DOI":"10.1109\/SURV.2013.013013.00155"},{"key":"bibr4-0037549717754134","doi-asserted-by":"crossref","unstructured":"Andersen DG. 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