这里的业务逻辑是由用户自定义的函数子实现，并且这些函数子只能用在逻辑记录处理的工作上，而不用关心多个处理操作的问题。
The business logic is implemented in user-definable functors that only work on logical record processing and aren't concerned with multiprocessing issues.
但是，因为ext3在文件系统内部和日志中使用完整块，ext3处理的复杂度比实现逻辑日志记录的要小。
But because ext3 USES complete blocks internally and in the journal, ext3 doesn't deal with as much complexity as it would if it were to implement logical journaling.
InfoSphereDataStage任务通过使用高级逻辑来评估一行，该高级逻辑在评估其所需执行规则的阶段中，处理每个记录。
The InfoSphere DataStage job evaluates a row by using high level logic that has each record processed through a stage that evaluates the rules it needs to execute.
在已经记录了的区域上覆写数据时，在未记录的用户数据区域上进行替换记录来进行逻辑覆写处理。
When data are written over a recorded area, the data are alternately recorded in an unrecorded user data area, thereby performing logical overwrite processing.
在已经记录了的区域上覆写数据时，在未记录的用户数据区域上进行替换记录来进行逻辑覆写处理。
When data are written over a recorded area, the data are alternately recorded in an unrecorded user data area, thereby performing logical overwrite processing.
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