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Microsoft Sharepoint Products and Technologies Resource Kit eBook

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282 Part IV: Deployment Scenarios<br />

Components Selection page, but it will not be eligible for support <strong>and</strong> you will not be<br />

able to create a new portal site in it. In addition, unsupported topologies cannot be<br />

backed up or restored. When you open SPSBackup.exe, it will show an error “Topology<br />

not supported” <strong>and</strong> exit. It is strongly recommended that you stay away from<br />

these unsupported topologies. Installing the database component on one of the servers<br />

running SharePoint Portal Server is an unsupported topology for a farm. Installing<br />

two or more servers with all (Web/search/index) components is also not supported.<br />

Here are the supported topologies:<br />

■ Small Server Farm. One server running SQL Server 2000 <strong>and</strong> one server<br />

running SharePoint Portal Server 2003 assigned the Web, Search, Job, <strong>and</strong><br />

Index services.<br />

■ Medium Server Farm. One or two servers running SharePoint Portal Server<br />

2003 assigned the Web service (more commonly known as front-end Web servers)<br />

<strong>and</strong> running SharePoint Portal Server 2003 assigned the Search, Job, <strong>and</strong><br />

Index services; <strong>and</strong> one server running SQL Server 2000.<br />

■ Large Server Farm. Two to eight servers running SharePoint Portal Server<br />

2003 assigned the Web service (more commonly known as front-end Web servers),<br />

two to four servers running SharePoint Portal Server 2003 assigned the<br />

Search service, one to four servers running SharePoint Portal Server 2003<br />

assigned the Index service (one of which must be assigned the Job Server<br />

role), <strong>and</strong> any number of servers running SQL Server 2000.<br />

In all supported topologies, you can use a single additional server running<br />

SharePoint Portal Server 2003 for the purpose of running the backward-compatible<br />

document library.<br />

Two factors differentiate a medium farm from a large farm. The first factor is<br />

the server component matrix—you will need more servers to run a minimum large<br />

farm. The second difference is that the Web <strong>and</strong> search components run on all frontend<br />

Web servers in a medium farm, while on a large farm these components must<br />

each run on separate servers. Medium server farms become large server farms by<br />

adding Web/search front-end servers, using Network Load Balancing (NLB) to distribute<br />

the load, <strong>and</strong> by adding search <strong>and</strong> indexing servers to the server component<br />

matrix. As long as you stay within the boundaries of a prescribed server farm, any<br />

combination of these can be employed. Only four index servers can exist in a large<br />

server farm because each search server can only consume four separate catalogs.<br />

For more information about how each of these components affects performance,<br />

please see Chapter 9. The most common medium-farm topology consists of two<br />

front-end Web servers running search <strong>and</strong> indexing/job servers, <strong>and</strong> one SQL component,<br />

for a total of four servers. The SQL component can be either a single server<br />

or a clustered server, but because the cluster acts like one system, it will be discussed<br />

here as one component. SharePoint Portal Server does not really care what the SQL<br />

Server topology is because this is abstracted from the server farm deployment.

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