Database data distribution management

The maintaining of a database that is distributed across a front database and one or more cloud databases. Rather than have the front and remote portions of the database be fixed, a data distribution manager evaluates databases segments following a data distribution policy to identify one or more database segments that are to be transferred to or from the one or more cloud databases from or to the front database. In response, the data distribution manager causes the identified database segment to be moved. Accordingly, the data that is in the front database (and the data that is stored in the cloud) may vary over time. 维护跨越前端数据库和个或者多个云数据库而分布的数据库。不是将数据库的前端和远程部分固定，数据分布管理器遵循数据分布策略来评估数据库分段，以识别个或者多个数据库段，所述个或者多个数据库段将从所述前端数据库被传送到所述个或者多个云数据库、或将从所述个或者多个云数据库被传送到所述前端数据库。作为响应，数据分布管理器使得识别的数据库段被移动。因此，在前端数据库中的数据(和存储在云中的数据)可随时间变化。