{"title":"Web服务器集群中的全局缓存机制","authors":"M. E. Poleggi, B. Ciciani, M. Colajanni","doi":"10.1109/MASCOT.2002.1167103","DOIUrl":null,"url":null,"abstract":"We investigate how to improve Web cluster performance through cooperation protocols for a shared use of the main memories of the server nodes (global caching). Many popular schemes to locate requested documents are based upon locality information sharing (namely, informed cooperation); we also propose a novel approach for document lookup through a query broadcasting mechanism (namely, on-demand cooperation). Moreover, we consider the migration and handoff mechanisms to retrieve successfully located documents. The experimental results show that, in a static Web scenario, the on-demand with handoff scheme performs similarly to the informed with handoff scheme, whereas the on-demand with migration scheme outperforms the informed with migration scheme. On the other hand, in a scenario with some dynamic requests, on-demand cooperation experiences a significant performance degradation with respect to informed cooperation.","PeriodicalId":384900,"journal":{"name":"Proceedings. 10th IEEE International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunications Systems","volume":"52 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2002-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Global caching mechanisms in clusters of Web servers\",\"authors\":\"M. E. Poleggi, B. Ciciani, M. Colajanni\",\"doi\":\"10.1109/MASCOT.2002.1167103\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We investigate how to improve Web cluster performance through cooperation protocols for a shared use of the main memories of the server nodes (global caching). Many popular schemes to locate requested documents are based upon locality information sharing (namely, informed cooperation); we also propose a novel approach for document lookup through a query broadcasting mechanism (namely, on-demand cooperation). Moreover, we consider the migration and handoff mechanisms to retrieve successfully located documents. The experimental results show that, in a static Web scenario, the on-demand with handoff scheme performs similarly to the informed with handoff scheme, whereas the on-demand with migration scheme outperforms the informed with migration scheme. On the other hand, in a scenario with some dynamic requests, on-demand cooperation experiences a significant performance degradation with respect to informed cooperation.\",\"PeriodicalId\":384900,\"journal\":{\"name\":\"Proceedings. 10th IEEE International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunications Systems\",\"volume\":\"52 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2002-10-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings. 10th IEEE International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunications Systems\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/MASCOT.2002.1167103\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings. 10th IEEE International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunications Systems","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/MASCOT.2002.1167103","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Global caching mechanisms in clusters of Web servers
We investigate how to improve Web cluster performance through cooperation protocols for a shared use of the main memories of the server nodes (global caching). Many popular schemes to locate requested documents are based upon locality information sharing (namely, informed cooperation); we also propose a novel approach for document lookup through a query broadcasting mechanism (namely, on-demand cooperation). Moreover, we consider the migration and handoff mechanisms to retrieve successfully located documents. The experimental results show that, in a static Web scenario, the on-demand with handoff scheme performs similarly to the informed with handoff scheme, whereas the on-demand with migration scheme outperforms the informed with migration scheme. On the other hand, in a scenario with some dynamic requests, on-demand cooperation experiences a significant performance degradation with respect to informed cooperation.
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