Once a checkpoint is transferred to the RSS node, it will start staging the log records coming from the primary in a log staging area at RS secondary server. 一旦将检查点传输给RSS节点,它会开始将来自主要服务器的日志记录暂存到RS次要服务器上的日志暂存区域中。
If the checkpoint file exists, the package restarts from the point of the previous execution failure; otherwise, it runs from the start of the package workflow. 如果检查点文件存在,则包从上一次执行失败的点重新启动;如果检查点文件不存在,则包从包工作流的起点开始运行。
In addition, there are other minor differences, such as the default permission level that is required to start new databases, or the permissions required to execute the checkpoint statement. 此外,还有其它微小差异,例如,启动新数据库所需的缺省权限级别,或执行checkpoint语句所需的权限。