Another key feature of cloud storage is geographic distribution of data (geographic scalability), allowing the data to be nearest the users over a set of cloud storage data centers (via migration).
云存储的另一个关键特性是数据的地理分布(地理可扩展性),支持经由一组云存储数据中心(通过迁移)使数据最接近于用户。
The second article also provides the source code for a utility to generate DDL needed for the migration of XML data.
第二篇文章还提供了一个实用程序的源代码,可以生成迁移XML数据所需的DDL。
You can therefore evolve a spec with new elements and constraints without impacting or forcing a migration of product data.
因此,您可以使用新的元素和约束来使spec发生演变,而不会对产品数据产生影响或实施迁移。
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