检查点文件可能找不到或被损坏。
检查点文件将更新以反映新的检查点的位置。
The checkpoint file is updated to reflect the new location of the checkpoint.
检查点存储在称为检查点文件的特殊文件中。
The checkpoint is stored in a special file called the checkpoint file.
只有那些与一致性快照相符的镜像被写到检查点文件，行影子使当前执行的事务可以在检查点创建期间不受限制地运行。
Only those images that correspond to a consistent snapshot are written to the checkpoint file, and the row shadows allow the currently executing transactions to run unrestricted during checkpointing.
检查点机制的状态检查操作就是将进程在该运行时刻的用户级寄存器上下文和用户数据段保存到检查点文件中。
Statecheck operation of checkpoint preserves the user register context and user data segment of process checkpointed at this time to checkpoint file.
当发出这个命令时，处于联机备份模式的所有数据文件都将被发放检查点SCN。
When this command is issued, all data files that are in the online backup mode will be issued checkpoint SCN.
博客文章被备份为标准文件系统的一部分，而不需要数据库转储或检查点。
Blog posts are backed up as part of the standard file system rather than requiring database dumps or checkpoints.
一旦系统发生崩溃，日志文件就会起到一个检查点的作用，用于恢复未保存的信息，防止损坏文件系统元数据。
If a crash occurs, the journal can be used as a checkpoint to recover unsaved information and avoid corrupting file system metadata.
在NiLFS(2)中，这些时期被称作检查点，它们是文件系统中不可或缺的一部分。
These epochs are called checkpoints in NiLFS (2) and are an integral part of the file system.
现在，在该文件系统中添加一些文件，然后使用lscp命令列出当前可用的检查点(如清单3所示)。
Now, add a few files to the file system, and then use the LSCP command to list the current checkpoints available (see Listing 3).
检查点意味着正在运行的VPS的状态被冻结并存储到一个文件中。
Checkpointing means that the state of a running VPS is frozen and store into a file.
如果当前检查点失效，文件系统只需回滚到上一个有效的检查点，重新获得有效的文件系统。
If the current checkpoint was invalid, the file system need only step back to the last good checkpoint for a valid file system.
对于没有处在联机备份模式的那些数据文件，随后的检查点将在它们的文件头中添加scn。
For those data files not in the online backup mode, subsequent checkpoint will increase the SCN in their headers.
RedoLogfile SizingAdvisor ——此特性推荐重做日志文件的最佳大小，从而避免因频繁出现的检查点而导致过多的磁盘I/O。
Redo Logfile Sizing Advisor - This feature recommends the optimal size of redo log files in order to avoid excessive disk I/Os due to frequent checkpointing.
当发出“AlterTablespace ts_nameEndBackup”时，在联机备份数据文件的的文件头中再次记录了检查点scn。
When Alter Tablespace ts_name End backup is issued, again a checkpoint SCN is recorded at the headers of online backup data files.
检查点(CKPt)——将数据文件头和控制文件头与当前重做日志和检查点数同步。
Checkpoint (CKPt) - Synchronizes the headers of data files and control files with the current redo log and checkpoint Numbers.
增量检查点和日志末尾之间的间隔被最小在线日志文件大小的90%所限制。
The lag between the incremental checkpoint target and the log tail is also limited by 90% of the smallest online log file size.
如果日志文件的大小为20m，你将在每个日志文件发生4次检查点。
If the size of your redo log is 20m, you are taking 4 checkpoints for each log.
这个需求精心设计日志文件大小从而不会由于频繁的日志切换避免不必要的检查点。
This necessitates well-sized redo logs to avoid unnecessary checkpoints as a result of frequent log switches.
实时文件镜像和检查点与回滚恢复(CRR)是减少故障损失提高可用性的重要技术。
Real Time File Mirrorring and CheckPointing and Rollback Recovery (CRR) is used to decrease the loss of fault then improve the availability.
提出了一个核心级文件检查点系统结构框架。
日志文件中数据库恢复开始的位置称作检查点位置。
The position in the redo log where recovery is to start is referred to as the checkpoint position.
检查点队列中还包含日志文件中数据块最后一次被修改的位置。
It also contains the location in the redo log where the data block was last changed.
检查点队列中还包含日志文件中数据块最后一次被修改的位置。
It also contains the location in the redo log where the data block was last changed.
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