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88 Chapter 7. Linux Virtual Server Overview

7.2. A Three Tiered LVS Conﬁguration

Figure 7-2 shows a typical three tiered LVS cluster topology. In this example, the active

LVS router routes the requests from the Internet to the pool of real servers. Each of the real

servers then accesses a shared data source over the network.

Figure 7-2. A Three Tiered LVS Conﬁguration

This conﬁguration is ideal for busy FTP servers, where accessible data is stored on a cen-

tral, highly available server and accessed by each real server via an exported NFS directory

or Samba share. This topography is also recommended for websites that access a central,

highly available database for transactions. Additionally, using an active-active conﬁgu-

ration with Red Hat Cluster Manager, administrators can conﬁgure one high-availability

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Red Hat CLUSTER SUITE 4.7 DM MULTIPATH Guia de Instalação Página 104