Red Hat NETWORK PROXY SERVER 4.0 Installation Manual

Red Hat NETWORK PROXY SERVER 4.0 Installation Manual Manual pdf 16 page image

12 Chapter 3. Example Topologies3.2. Multiple Proxy Horizontally Tiered TopologyFor larger networks, a more distributed method may be needed, such as having multipleRHN Proxy Servers all connecting to Red Hat Network individually. This horizontallytiered configuration balances the load of client requests while enabling each Proxy to si-multaneously synchronize with RHN.A disadvantage of this horizontal structure is that custom packages loaded to an individualProxy must be distributed to its sibling servers. This situation can be addressed in one oftwo ways:• Either, the rsync file transfer program can be used to synchronize packages between theProxies, or• a Network File System (NFS) share can be established between the Proxies and thecustom channel repository.Either of these solutions will allow any client of any RHN Proxy Servers to have all custompackages delivered to them.Figure 3-2. Multiple Proxy Horizontally Tiered Topology3.3. Multiple Proxy Vertically Tiered TopologyAn alternative method for multiple RHN Proxy Servers is to establish a primary Proxythat the others connect to for RPMs from Red Hat Network and custom packages createdlocally. In essence, the secondary Proxies act as clients of the primary. This alleviates the