每次测试之后，测试程序都会恢复到初始的状态，这就会在测试用例运行期间清除所有创建的测试数据。
After every test case, the application under test is restored to its initial state, which involves cleaning up the test data created during the test case run.
DB 2 UD b数据库的分割镜像可以被初始化为一个热备用数据库，当主数据库不可用时，可提供一个快速的灾难恢复选项。
A split mirror of a DB2 UDB database can also be initialized as a warm standby database, providing a quick disaster recovery option if the primary database becomes unavailable.
将分割镜像初始化为快照时，将执行崩溃恢复，回滚所有未提交的事务，并使数据库可以被所有读或写操作访问。
The initialization of the split mirror as snapshot performs a crash recovery, rolls back all uncommitted transactions, and makes the database available for any read or write operation.
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