In special cases where the cycle can't be estimated or copy process times are long, a script could query the Snapshot CoW usage with lvdisplay and extend the lv on demand.

在某些特殊情况下，无法估计备份周期或者复制过程很长，那么脚本可以用lvdisplay查询Snapshot CoW的使用情况并根据需要扩展这个lv。

youdao

Once the copy process finishes and the Snapshot is no longer needed, simply unmount and scrap it using lvremove.

复制过程完成之后，就不需要快照了，这时只需用lvremove卸载并销毁它。

youdao

For example, running a file system copy while the database is running won't give you a snapshot for your database for a particular point in time (PIT).

例如，如果数据库在运行，那么执行文件系统复制操作时将得不到即时点(point in time, PIT)上数据库的快照。

youdao