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。
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).
在原处分开或者合并卷组。当将整个逻辑卷迁移到下线存储或者从下线存储迁移时是非常有用的。
Split or merge volume groups in situ (as long as no logical volumes span the split). This can be useful when migrating whole logical volumes to or from offline storage.
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