Topic Last Modified: 2011-02-10

In order to see impact of network latency between two sites, we deployed a network latency simulator. The simulator allowed us to test different latencies and come up with a recommendation for maximum acceptable and supported latency.

Besides testing network latency, we also wanted to test the impact of latency on data storage replication. In order to test storage latency, we connected two storage nodes (one at each site) by means of a fiber channel to the IP gateway. This connection enabled data replication over the IP network, which made it possible to use the network latency simulator to test latency along the data path.

The WAN/SAN latency simulator was used for testing purposes only. The simulator is not a requirement for the solution described in this paper and is not required for Microsoft support.