Determines the logical unit of work that the component s processing executes -确定组件处理执行的逻辑工作单元。
A transaction is a sequence of operations performed as a single logical unit of work 事务是作为单个逻辑工作单元执行的一系列操作。
Both steps have to be processed as a logical unit of work , and failure in one of the services will result in a failure message to the user 这两步都必须处理为一个逻辑工作单元(即事务) ,其中任何一个服务的失败都会向用户发送失败的信息。
For a logical unit of work , all of the data modifications made during a transaction are either committed together as a unit or rolled back as a unit 对于逻辑工作单元,事务期间所做的全部数据修改都是作为一个单元一起提交或作为一个单元回滚的:
A logical unit of work must exhibit four properties , called the atomicity , consistency , isolation , and durability acid properties , to qualify as a transaction 一个逻辑工作单元必须有四个属性,称为原子性、一致性、隔离性和持久性( acid )属性,只有这样才能成为一个事务。
A multiphase process that copies all the data and log pages from a specified backup to a specified database the data - copy phase and rolls forward all the transactions that are logged in the backup the redo phase 事务( transaction )组合成一个逻辑工作单元的一组数据库操作,这些操作要么全部提交,要么回滚。事务是原子的、一致的、孤立的和持久的。