# DAHServer`N` Configuration

When Distributed Index Handler Round Robin mode indexing is enabled, use the `[DAHServerN]` options to configure child servers for power up and shut down when roll-over occurs. This allows optimal data indexing on a specific child server by suspending query handling on that server.

For example, if RoundRobinMode=`true`:

    [DAHServer0]
    Host=thisisahost
    Port=12000
    ShutDownEnginePeriods=0,-1

    [DAHServer1]
    Host=thisisanotherhost
    Port=13000
    StartUpEnginePeriods=-2

When a roll over occurs, the DAH child server that indexed data yesterday and the DAH child server that indexes data today shut down. At the same time, the DAH child server that indexed data the day before yesterday are powered up.

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