Autodesk 15606-011408-9320 User Guide - Page 55

The distributed data model requires less maintenance than the mirrored systems model. However, this approach is not fault tolerant-if one Autodesk MapGuide Server goes down, map viewers cannot access the data on that server. The mirrored systems model is safer than the distributed data model because it does have fault tolerance, which provides a backup server so that the data is still available. However, mirrored systems can require more maintenance than distributed data systems if you need to update the servers. The following diagrams illustrate the two different multiple server architectures. In the first diagram, notice that there are three web server computers, each with its own Autodesk MapGuide Server. Each contains different data. In this case, requests are distributed among the servers based solely on which data is requested; if repeated requests are made for the same data, only the server containing that data will be processing the requests. To make this model work, you must plan the placement of your data carefully so that requests are distributed equally among the servers. raster data Web Server 1 Map Agent MapGuide Server 1 spatial data... Web Server 2 Map Agent MapGuide Server 2 ...more spatial data... Web Server 3 Map Agent MapGuide Server 3 ...still more spatial data Example of distributed data OLE DB Attribute Data Architecture and Performance | 55