支持数据水平分割，这样在数据量增加的情况下可以使用更多数据库硬件。
Allow for horizontal partitioning so we can add more database hardware as the corpus grows.
每次事务修改的对象数量越少就意味着会有更多数据库提交，正如4.5节所述每次提交都会带来磁盘相关的开销。
A smaller number of changed objects per transaction mean more commits to your database, each of which incurs some disk-related overhead as mentioned in Section 4.5.
当一个数据库由两个或更多数据库分区组成，并且每个数据库分区存储位于其中的每个表的一部分表数据时，就属于数据库分区的情况。
Database partitioning occurs when a database consists of two or more database partitions, where each database partition stores a subset of table data for each table that resides within it.
许多数据库技术都能够提供一种集群化的数据库模型，允许对同一个数据库提供更多的容量。
Many database technologies have the ability to provide a clustered database model that allows more capacity to be provided against the same database.
许多数据库技术都能够提供一种集群化的数据库模型，允许对同一个数据库提供更多的容量。
Many database technologies have the ability to provide a clustered database model that allows more capacity to be provided against the same database.
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