Hereinto, DSU is shorted for database storage unit. It is one subsystem of communication based train control (CBTC) system.
其中，DSU是数据库存储单元的简称，它是CBTC系统所包含的诸多子系统之一。
A JDO transaction instance is the vehicle for carrying out a unit of work, according to the conventional definition of a transaction, against a persistence storage system (or database).
依据对交易的传统定义，一个JDO交易示例就是执行单元操作的载体，执行的基础是持久性存储系统(或者数据库)。
A chunk is the largest unit of physical disk dedicated to database server data storage.
区块是用于数据库服务器数据存储的最大物理磁盘单元。
An extentis a logical unit of database storage space allocation made up of a number of contiguousdata blocks. One or more extents in turn make up a segment.
区是由许多连续的数据块组成的逻辑数据库存储分配空间的单位。
An extentis a logical unit of database storage space allocation made up of a number of contiguousdata blocks. One or more extents in turn make up a segment.
区是由许多连续的数据块组成的逻辑数据库存储分配空间的单位。
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