彼得拔腿就跑，头也不抬地冲下山坡，翻着跟斗向前滚。
Peter shot off and rushed head over heels down the mountain-side, turning wild somersaults on his perilous way.
不进行前滚会使数据库处于未决模式。
您需要使用此命令前滚数据库（请参阅清单17）。
You need to roll forward your database by using this command (also in Listing 17).
此进程在回滚、重启恢复和前滚期间读取日志文件。
This process reads log files during rollback, restart recovery and roll forward.
在CLP中，可以发出以下命令来执行恢复，并前滚表空间。
In the CLP, you will issue the following to do a restore and roll forward a table space.
要恢复增量备份，只需要两步，恢复增量数据库并前滚。
To recover from the incremental backup, there are only two steps to follow, Restore the incremental database and roll forward to completion.
Recovery—表示保留日志，且可以用于前滚恢复。
Recovery - to indicate that the logs are retained, and can be used for forward recovery.
因此，用源数据库中的任何日志进行前滚都是行不通的。
Therefore, rollforward through any of the logs from the source database is not possible.
在前滚过程中可以更改此配置参数以允许您访问多个位置中的日志。
You can change this configuration parameter during the roll-forward process to allow you to access logs in multiple locations.
在CLP中，您将发出下面的命令来执行恢复，并前滚整个数据库。
In the CLP, you will issue the following commands to do a restore and roll forward a full database.
在使用表空间之前，必须前滚该表空间(或是整个数据库)。
The table space (or the entire database) must be rolled forward before the table space can be used.
他还可以将数据库前滚到应用程序破坏数据之前的一个时间点。
He is also able to roll the database forward to a point in time just before the application did its damage.
但是注意，可以选择前滚到给定的本地时间(新特性)或GMT时间。
Note, however, that you have the option to roll forward to a given local time (new feature) or GMT time.
表空间或数据库的恢复可以通过恢复备份映像和前滚来完成。
The restore for table Spaces or database can be done by restoring a backup image and rolling forward.
手动地确定前滚一个数据库的正确时间点比较困难，对于分区数据库更是如此。
Manually determining the correct point in time to which to roll forward a database is difficult, particularly for a partitioned database.
如果取消选择这两个参数，就不能对数据库进行前滚恢复，因为将不再保留日志。
If both of these parameters are de-selected, roll-forward recovery becomes unavailable for the database because logs will no longer be retained.
使用恢复任务助手恢复数据库，并前滚到运行delete语句之前的时间点。
Use the restore task assistant to restore the database and roll forward to a point in time before the delete statements were run.
不断地复制或获取源数据库上的非活动日志文件，并在目标数据库上前滚它们。
Continually copy over or retrieve the inactive log files from the source database and roll them forward on the target database.
执行前滚恢复操作的结果与使用HADR在备用数据库上重播日志的结果略有不同。
The results of performing a roll-forward recovery operation could differ slightly from replaying the logs on the standby database using HADR.
还有些地方，大团的熔岩——像烤焦的面包——在流入海中爆发之前滚过低矮的树丛。
In other places, vast gouts of lava - the texture of burned bread - had rolled through the scrub before exploding on the shore.
不过，人们仍担心的是，德国银行业未能提供足够信贷，以推动复苏的车轮向前滚动。
However, worries remain that the country's banking sector is failing to provide the credit needed to oil the wheels of recovery.
通过将它设置成“RECOVERY”来启用它，从而允许数据库管理器使用前滚恢复方法。
Enabling it by setting it to "recovery" allows the database manager to use the roll-forward recovery method.
因为您可以更改日志路径位置，所以前滚恢复所需的日志可能会在不同的目录中或在不同的设备上存在。
Because you can change the log path location, the logs needed for roll-forward recovery may exist in different directories or on different devices.
另一种机制通过使用全备份，并前滚事务日志，使数据库恢复到最近的状态，这种机制也叫前滚恢复。
The second restores to the most recent state, using a combination of full backup plus rolling forward the transaction log, called rollforward recovery.
当使用userexit配置参数或logretain配置参数以允许前滚恢复时，活动日志路径非常重要。
The active log path is important when using either the userexit configuration parameter or the logretain configuration parameter to allow roll-forward recovery.
overflowlogpath（默认值是NULL）——表示在前滚恢复期间使用的日志路径。
overflowlogpath (default: NULL) - Indicates the log path to use during rollforward recovery.
如果您对现有数据库启用前滚恢复，将主日志的数量更改成当前正在使用的主日志和辅助日志的数量总和，再加1。
If you are enabling an existing database for roll-forward recovery, change the number of primary logs to the sum of the number of primary and secondary logs you are currently using, plus 1.
以上例子表明，在前滚期间，如果命令中指定的时间点(PIT)过早，那么会收到错误消息(SQL 1275n)。
The above example shows that during roll-forward if point in time (PIT) specified in the command is old or early, you get error message (SQL1275N).
以上例子表明，在前滚期间，如果命令中指定的时间点(PIT)过早，那么会收到错误消息(SQL 1275n)。
The above example shows that during roll-forward if point in time (PIT) specified in the command is old or early, you get error message (SQL1275N).
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