考虑以下内容

1. Sql Azure需要群集索引来执行复制.注意，索引不必是唯一的. http://blogs.msdn.com/b/sqlazure/archive/2010/05/12/10011257.aspx

聚簇索引的优势在于，索引的范围查询是通过最少的寻道来***执行的.

The advantage of a clustered index is that range queries on the index are performed optimally with minimum seeks.

聚集索引的缺点是，如果以不按顺序的顺序添加数据，则可能会发生页面拆分，并且插入速度可能会相对较慢.

The disadvantages of a clustered index is that, if data is added in out of sequence order, page split may occur and inserts may be relatively slower.

参考以上内容，我建议以下内容

Referencing the above, I suggest the following

1. 如果您拥有真实的密钥范围，则需要查询，例如日期，序号等

1. If you have a real key range you need to query upon, for example date, sequential number etc

1. 为该键创建一个(唯一/非唯一)聚集索引.
2. 使用域生成的GUID创建附加的唯一索引.