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The main issues in fog computing includes fog networking, QoS, interfacing and programming model, computation offloading, accounting, billing and monitoring, provisioning and resource management, security and privacy. A particular research challenge is the Quality of Service metric for fog services. Thus, this paper gives a survey of cloud computing, discusses the QoS metrics, and the future research directions in fog computing.<\/jats:p>","DOI":"10.4018\/ijfc.2018070104","type":"journal-article","created":{"date-parts":[[2018,7,30]],"date-time":"2018-07-30T14:04:03Z","timestamp":1532959443000},"page":"109-118","source":"Crossref","is-referenced-by-count":7,"title":["Fog Computing Qos Review and Open Challenges"],"prefix":"10.4018","volume":"1","author":[{"given":"R.","family":"Babu","sequence":"first","affiliation":[{"name":"Rajalakshmi Engineering College, Chennai, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"K.","family":"Jayashree","sequence":"additional","affiliation":[{"name":"Rajalakshmi Engineering College, Chennai, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"R.","family":"Abirami","sequence":"additional","affiliation":[{"name":"Rajalakshmi Engineering College, Chennai, India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2432","reference":[{"key":"IJFC.2018070104-0","doi-asserted-by":"publisher","DOI":"10.1109\/IBCAST.2014.6778179"},{"key":"IJFC.2018070104-1","unstructured":"Alessio, B., Donato, W., Persico, V., & Pescap\u00e9, A. 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