如果将logretain值更改为RETAIN，数据库就处于备份暂挂状态。

If you have changed the LOGRETAIN value to RETAIN, the database will be in backup pending state.

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当备用数据库(假设只包含dms表空间)处于前滚暂挂(rollforward pending)状态时，DB 2 UDB允许对它做完全数据库备份。

DB2 UDB allows you to take a full database backup of a standby database (if it only contains DMS tablespaces) while it is in the rollforward pending state.

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