Cross-Site High-Availability Model
In the next model, illustrated in Figure 17.2, the same concepts apply, except that the SQL mirror, witness, and additional SharePoint farm members are physically housed in a separate site. This is an ideal model, but it requires a backup data center that is physically close by because the network latency must be less than 1ms and the bandwidth between sites must be verifiably above 1Gb at all times.
Figure 17.2. Examining the cross-site high-availability SQL mirroring model.
In this model, if the primary data center were to completely fail, the SharePoint environment would continue to run on the synchronously ...
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