問題文
One data file has grown to several terabytes and its backup takes far longer than the backup of all the other files together. Which statement describes what a multisection backup changes?
選択肢
- The single file is divided into sections and just the sections that changed are copied, so the elapsed time for that one file goes down as the amount of change in the file becomes smaller.
- The single file is divided into sections that several channels process at the same time, so the elapsed time for that one file goes down by a large factor.
- The single file is divided into sections that are stored on different disks, so the elapsed time for that one file goes down because each disk holds a smaller part of those file afterwards.
- The single file is divided into sections that are written to separate backup sets on a rotating schedule, so the elapsed time for that one file goes down over the course of several later nights.