使用数据库和Web服务器上的本地数据源将增加复制和备份的难度，并且加重了Web服务器的负荷。

Using databases and other data sources that are local to the Web server makes replication and back-ups difficult and also increases the load on the Web server.

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GSD包含一些引人注目的特性：数据跨多个数据中心复制和备份，保证读写一致性，最多容纳5tb的对象。

GSD has a few attractive features: data is replicated across multiple data centers and it is backed up, it has read-your-writes consistency, and can accept objects up to 5tb.

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本文提供了一组强大的过程，可以执行模式级操作，比如对给定模式中的所有对象进行逻辑备份、恢复和复制。

This article provides a group of powerful procedures that allow for schema-level operations such as logical backup, restore, and copy of all objects in a given schema.

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