In the current implementation, a checkpoint only occurs when the NameNode starts up. Work is in progress to support periodic checkpointing in the near future.
在当前实现中，checkpoint只发生在Namenode启动时，在不久的将来我们将实现支持周期性的checkpoint。
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.
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。
This means a checkpoint at the primary server completes only after the checkpoint at the SD server completes.
这意味着只有在SD服务器中的检查点完成后，主服务器中的检查点才能完成。
Too little security, and your only defense system will be thwarted and allow full access to everything inside that checkpoint.
如果安全措施太少，您唯一的防御系统将会失效，从而让外人能够访问检查点之后的所有数据。
Although we had about ten big subsystems in the supersystem, representatives from only seven of these subsystems routinely showed up for the weekly architecture checkpoint.
尽管我们在这套超级系统中拥有大约10个大型的子系统，但只有7个子系统对于每周的构架检查点具有代表性。
If the current checkpoint was invalid, the file system need only step back to the last good checkpoint for a valid file system.
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。
The only downside is that if one person dies, you fail the mission and have to start from the last checkpoint.
唯一的缺点就是如果任何一个队员死亡，任务即失败而且不得不从上一个记录点重新开始。
Not only can the new method reduce checkpoint overhead effectively, but also has a shorter checkpoint latency.
该方法不仅能够有效地减少检查点开销，而且具有比较短的检查点延迟。
The so-called checkpoint kinases, i. e. the enzymes which perform this controlling, are not directly associated only with the chromosomes, as was previously assumed to be the case.
检测点激酶在染色体分配过程中担负着控制角色。检测点激酶并不是如以前所假定的仅与染色体存在直接关联。
The so-called checkpoint kinases, i. e. the enzymes which perform this controlling, are not directly associated only with the chromosomes, as was previously assumed to be the case.
检测点激酶在染色体分配过程中担负着控制角色。检测点激酶并不是如以前所假定的仅与染色体存在直接关联。
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