DB2有一个非常高效的备份实用程序，它可以将从数据库读出的数据页分成多个部分，并以随机的顺序将它们写到目标设备。
DB2 has a very efficient and optimized backup utility that multiplexes the data pages it reads from the database and writes them to the target device in a randomized order.
还有第四种任务，通过该任务可以访问 Derby 引擎附带的一个非常重要的实用程序
There is also a fourth task that provides access to a very important utility that ship’s with the Derby engine
该实用程序还非常灵活，允许每个开发人员根据他们自己的偏好使用。
The utility is also flexible enough to allow each developer to have their own preferences.
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