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However, applying replication techniques is not trivial, and various Content Delivery Networks (CDNs) have been created to facilitate replication for digital content providers. The success of these CDNs has triggered further research efforts into developing advanced &lt;i&gt;Web replica hosting systems&lt;\/i&gt;. These are systems that host the documents of a website and manage replication automatically. To identify the key issues in designing a wide-area replica hosting system, we present an architectural framework. The framework assists in characterizing different systems in a systematic manner. We categorize different research efforts and review their relative merits and demerits. As an important side-effect, this review and characterization shows that there a number of interesting research questions that have not received much attention yet, but which deserve exploration by the research community.<\/jats:p>","DOI":"10.1145\/1035570.1035573","type":"journal-article","created":{"date-parts":[[2005,1,26]],"date-time":"2005-01-26T16:35:53Z","timestamp":1106757353000},"page":"291-334","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":94,"title":["Replication for web hosting systems"],"prefix":"10.1145","volume":"36","author":[{"given":"Swaminathan","family":"Sivasubramanian","sequence":"first","affiliation":[{"name":"Vrije Universiteit, Amsterdam, The Netherlands"}]},{"given":"Michal","family":"Szymaniak","sequence":"additional","affiliation":[{"name":"Vrije Universiteit, Amsterdam, The Netherlands"}]},{"given":"Guillaume","family":"Pierre","sequence":"additional","affiliation":[{"name":"Vrije Universiteit, Amsterdam, The Netherlands"}]},{"given":"Maarten van","family":"Steen","sequence":"additional","affiliation":[{"name":"Vrije Universiteit, Amsterdam, The Netherlands"}]}],"member":"320","published-online":{"date-parts":[[2004,9]]},"reference":[{"key":"e_1_2_1_1_1","doi-asserted-by":"crossref","unstructured":"Aboba B. 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Cache placement methods based on client demand clustering. Tech. Rep. TR1437 , University of Wisconsin at Madison. July .]] Barford, P., Cai, J.-Y., and Gast, J. 2001. Cache placement methods based on client demand clustering. Tech. Rep. TR1437, University of Wisconsin at Madison. July.]]"},{"key":"e_1_2_1_10_1","volume-title":"Proc. 2nd Symposium on Principles of Distributed Computing (Montreal, Ont., Canada). ACM","author":"Bernstein P. A.","unstructured":"Bernstein , P. A. and Goodman , N . 1983. The failure and recovery problem for replicated databases . In Proc. 2nd Symposium on Principles of Distributed Computing (Montreal, Ont., Canada). ACM , New York, 114--122.]] 10.1145\/800221.806714 Bernstein, P. A. and Goodman, N. 1983. The failure and recovery problem for replicated databases. In Proc. 2nd Symposium on Principles of Distributed Computing (Montreal, Ont., Canada). 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