database - Restore Operation in SQL Server 2008 -


i want restore database backup[.bak] file on existing database. backup file full database backup. more efficient? restoring new database or overwriting existing database?

over top better. storage engine need zero-fill files (well... @ least log file if you've set configured instant file initialization) on disk. if files big, that's lot of 0's write. if overwrite, server knows space on disk isn't filled junk , doesn't have work.


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