Administration Guide › Set Up Distribution and Routing › DSAs with the Same Prefix

DSAs with the Same Prefix

Many DSAs can have the same prefix, and so serve the same namespace partition. A router DSA selects one of these DSAs to receive queries.

Having multiple DSAs with the same prefix improves the performance and availability of the directory service. These DSAs can be on the same computer, or on different computers.

You need to ensure that the DSAs are synchronized.

You can use groups of DSAs with the same prefix and the same data, as follows:

• Failover

  To improve the availability of the service, when one DSA fails, another automatically takes over its request load.

• Load sharing

  To improve performance, read requests are divided between two or more DSAs. This happens automatically between DSAs in the same site.