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1.8.2. Three-Tier LVS Topology

圖形 1.21, “Three-Tier LVS Topology” shows a typical three-tier LVS configuration. In the example, the active LVS router routes the requests from the public network (Internet) to the second tier — real servers. Each real server then accesses a shared data source of a Red Hat cluster in the third tier over the private network.
Three-Tier LVS Topology

圖形 1.21. Three-Tier LVS Topology

這​​​​​​​個​​​​​​​拓​​​​​​​樸​​​​​​​適​​​​​​​用​​​​​​​於​​​​​​​繁​​​​​​​忙​​​​​​​的​​​​​​​ FTP 伺​​​​​​​服​​​​​​​器​​​​​​​,要​​​​​​​存​​​​​​​取​​​​​​​的​​​​​​​資​​​​​​​料​​​​​​​都​​​​​​​儲​​​​​​​存​​​​​​​在​​​​​​​單​​​​​​​一​​​​​​​、​​​​​​​高​​​​​​​可​​​​​​​用​​​​​​​性​​​​​​​的​​​​​​​伺​​​​​​​服​​​​​​​器​​​​​​​上​​​​​​​,由​​​​​​​每​​​​​​​個​​​​​​​實​​​​​​​體​​​​​​​伺​​​​​​​服​​​​​​​器​​​​​​​透​​​​​​​過​​​​​​​ NFS 或​​​​​​​ Samba 來​​​​​​​存​​​​​​​取​​​​​​​。​​​​​​​這​​​​​​​個​​​​​​​拓​​​​​​​樸​​​​​​​也​​​​​​​適​​​​​​​用​​​​​​​於​​​​​​​存​​​​​​​取​​​​​​​單​​​​​​​一​​​​​​​、​​​​​​​高​​​​​​​可​​​​​​​用​​​​​​​性​​​​​​​資​​​​​​​料​​​​​​​庫​​​​​​​的​​​​​​​網​​​​​​​站​​​​​​​。​​​​​​​除​​​​​​​此​​​​​​​之​​​​​​​外​​​​​​​,使​​​​​​​用​​​​​​​ Red Hat 叢​​​​​​​集​​​​​​​的​​​​​​​動​​​​​​​態​​​​​​​ - 動​​​​​​​態​​​​​​​設​​​​​​​定​​​​​​​,使​​​​​​​用​​​​​​​者​​​​​​​可​​​​​​​以​​​​​​​設​​​​​​​定​​​​​​​一​​​​​​​個​​​​​​​高​​​​​​​可​​​​​​​用​​​​​​​性​​​​​​​的​​​​​​​叢​​​​​​​集​​​​​​​,為​​​​​​​其​​​​​​​他​​​​​​​類​​​​​​​似​​​​​​​情​​​​​​​形​​​​​​​提​​​​​​​供​​​​​​​服​​​​​​​務​​​​​​​。​​​​​​​