Does a Standby database have an .ldf file?
It was my understanding that a database only needs an .mdf file and an .ldf file.
If these two files are insufficient - if an undo file is also needed - wouldn't all SS databases need that third file?
To a small extent, I do understand that the undo file is used for undoing and redoing uncommitted transactions, but I don't understand why all that can't be handled by a standard .ldf file.