Installation and User's Guide

Related conceptsChapter 13, “Using commands,” on page 519Related reference“Restore” on page 613Examples: Restoring large amounts of dataIf you need to restore a large number of files, you get faster performance using thecommand line interface rather than the GUI interface. In addition, you improveperformance if you enter multiple restore commands at one time.For example, to restore all the files in your c: file space, enter:dsmc restore c:\* -subdir=yes -replace=all -tapeprompt=noHowever, if you enter multiple commands for the root directories in your c: filespace, you can restore the files faster. For example, enter these commands:dsmc restore c:\users\ -subdir=yes -replace=all -tapeprompt=nodsmc restore c:\data1\ -subdir=yes -replace=all -tapeprompt=nodsmc restore c:\data2\ -subdir=yes -replace=all -tapeprompt=noOr, if you need to restore files for multiple drives, enter these commands:dsmc restore c:\* -subdir=yes -replace=all -tapeprompt=nodsmc restore d:\* -subdir=yes -replace=all -tapeprompt=nodsmc restore e:\* -subdir=yes -replace=all -tapeprompt=noYou can also use the quiet option with the restore command to save processingtime. However, you will not receive informational messages for individual files.Note: If you already have the appropriate values set for the subdir, replace,tapeprompt, and quiet options in your client options file, it is not necessary toinclude these options in the commands.When you enter multiple commands to restore your files, you must specify aunique part of the file space in each restore command. Do not use any overlappingfile specifications in the commands.To display a list of the root directories in a file space, use the query backupcommand. For example:dsmc query backup -dirsonly -subdir=no c:\As a general rule, you can enter two to four restore commands at one time. Themaximum number you can run at one time without degrading performancedepends on factors such as network utilization and how much memory you have.For example, if \users and \data1 are on the same tape, the restore for \data1must wait until the restore for \users is complete. However, if \data2 is on adifferent tape, and there are at least two tape drives available, the restore for\data2 can begin at the same time as the restore for \users.The speed at which you can restore the files also depends upon how many tapedrives are available and whether your administrator is using collocation to keepfile spaces assigned to as few volumes as possible. If your administrator is usingcollocation, the number of sequential access media mounts required for restoreoperations is also reduced.Chapter 5. Restoring your data 167