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By combining replication and scheduling, this architecture improves efficiency and easy accessibility. In the case of failure of one sub cloud or one cloud service, clients can start using another cloud under \u201cfailover\u201d techniques. As a result, no one cloud service will go down.<\/p>","DOI":"10.4018\/ijcac.2012070103","type":"journal-article","created":{"date-parts":[[2012,10,22]],"date-time":"2012-10-22T16:02:58Z","timestamp":1350921778000},"page":"68-85","source":"Crossref","is-referenced-by-count":3,"title":["Cloud Computing"],"prefix":"10.4018","volume":"2","author":[{"given":"Nawsher","family":"Khan","sequence":"first","affiliation":[{"name":"Universiti Malaysia Pahang, Malaysia"}]},{"given":"Noraziah","family":"Ahmad","sequence":"additional","affiliation":[{"name":"Universiti Malaysia Pahang, Malaysia"}]},{"given":"Tutut","family":"Herawan","sequence":"additional","affiliation":[{"name":"University Ahmad Dahlan, Indonesia"}]},{"given":"Zakira","family":"Inayat","sequence":"additional","affiliation":[{"name":"University of Engineering & Technology, Peshawar, Pakistan"}]}],"member":"2432","reference":[{"key":"ijcac.2012070103-0","author":"I.Adan","year":"2008","journal-title":"Queuing theory"},{"key":"ijcac.2012070103-1","doi-asserted-by":"publisher","DOI":"10.1109\/TPDS.2008.264"},{"key":"ijcac.2012070103-2","unstructured":"Amazon. 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