This document discusses federations in SQL Azure. Federations allow scaling out data by partitioning it across multiple databases. The document shows an example of a "CustData" federation with members for customer ID ranges that each contain sample data partitions. It also shows an "Orders_Fed" federation partitioned by customer ID that could include related order data spread across multiple databases. In the future, SQL Azure will support federations natively as a way to scale databases beyond a single server.
5. Federation ¡°CustData¡±
Member: [min, 100)
AU
PK=
5
AU
PK=25
AU
PK=35
Member: [100, 488)
AU
PK=10
5
AU
PK=23
5
AU
PK=36
5
Member: [488, max)
AU
PK=55
5
AU
PK=25
45
AU
PK=35
65
(Federation Key:
CustID)