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Our results show that despite the fact the power demand of the storage device amounts for a small fraction of the power demand of the whole system, significant increases in power demand are observed when accessing the storage device. We investigate the access pattern impact on power demand, looking at the whole system and at the storage device by itself, and compare all tested configurations regarding energy efficiency. Then we extrapolate the conclusions from this research to provide guidelines for when considering the replacement of traditional storage servers by low\u2010power alternatives. We show the choice depends on the expected workload, estimates of power demand of the systems, and factors limiting performance. These guidelines can be applied for other architectures than the ones used in this work.<\/jats:p>","DOI":"10.1002\/cpe.4948","type":"journal-article","created":{"date-parts":[[2018,8,31]],"date-time":"2018-08-31T02:40:45Z","timestamp":1535683245000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Energy efficiency and I\/O performance of low\u2010power architectures"],"prefix":"10.1002","volume":"31","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7588-0503","authenticated-orcid":false,"given":"Pablo J.","family":"Pavan","sequence":"first","affiliation":[{"name":"Department of Exact Sciences and Engineering Regional University of Northwest of Rio Grande do Sul (UNIJUI)  Iju\u00ed RS Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ricardo","family":"K. Lorenzoni","sequence":"additional","affiliation":[{"name":"Department of Exact Sciences and Engineering Regional University of Northwest of Rio Grande do Sul (UNIJUI)  Iju\u00ed RS Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Vin\u00edcius","family":"R. Machado","sequence":"additional","affiliation":[{"name":"Institute of Informatics Federal University of Rio Grande do Sul (UFRGS)  Porto Alegre RS Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3915-1135","authenticated-orcid":false,"given":"Jean L.","family":"Bez","sequence":"additional","affiliation":[{"name":"Institute of Informatics Federal University of Rio Grande do Sul (UFRGS)  Porto Alegre RS Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4015-5619","authenticated-orcid":false,"given":"Edson L.","family":"Padoin","sequence":"additional","affiliation":[{"name":"Department of Exact Sciences and Engineering Regional University of Northwest of Rio Grande do Sul (UNIJUI)  Iju\u00ed RS Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1139-0724","authenticated-orcid":false,"given":"Francieli","family":"Z. Boito","sequence":"additional","affiliation":[{"name":"Department of Informatics and Statistics Federal University of Santa Catarina (UFSC)  Florian\u00f3polis SC Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9957-5861","authenticated-orcid":false,"given":"Philippe O.A.","family":"Navaux","sequence":"additional","affiliation":[{"name":"Institute of Informatics Federal University of Rio Grande do Sul (UFRGS)  Porto Alegre RS Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jean\u2010Fran\u00e7ois","family":"M\u00e9haut","sequence":"additional","affiliation":[{"name":"Laboratoire d'Informatique de Grenoble (LIG) University of Grenoble Alpes  Grenoble France"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2018,8,30]]},"reference":[{"key":"e_1_2_10_2_1","unstructured":"KoggeP BergmanK BorkarS et al.ExaScale computing study: technology challenges in achieving ExaScale systems.Defense Advanced Research Projects Agency Information Processing Techniques Office (DARPA IPTO) Technical Representative 15.Arlington VA:Defense Advanced Research Projects Agency (US);2008."},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1049\/iet-cdt.2014.0074"},{"key":"e_1_2_10_4_1","unstructured":"About Ambedded Technology Solution: CEPH S3 Multi Site Active Active Storage & DR.http:\/\/www.ambedded.com.tw\/solutions.php. 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