Installation and User's Guide

Standard query restore, no query restore, and restartable restoreThis topic describes the standard (or classic) restore method, the no query restoremethod, and the restartable restore method.Standard query restore process:The standard query restore process is also known as classic restore. This topicexplains how standard query restore works.Here is how standard query restore works:v The client queries the server for a list of files backed up for the client file spaceyou want to restore.v The server sends a list of backed up files that match the restore criteria. If youwant to restore both active and inactive files, the server sends information aboutall backed up files to the client.v The list of files returned from the server is sorted in client memory to determinethe file restore order and to minimize tape mounts required to perform therestore.v The client tells the server to restore file data and directory objects.v The directories and files you want to restore are sent from the server to theclient.No query restore process:The no query restore process is outlined below.1. The client tells the server that a no query restore is going to be performed andprovides the server with details about file spaces, directories, and files.2. The server sorts the data using an internal sort table which minimizes tapemounts.3. The data to be restored is sent to the client. File and directory objects stored ondisk are sent immediately since sorting for such data is not required beforerestoring it.4. You can use multiple sessions to restore the data. If the data resides on multipletapes, there are multiple mount points available at the server. The combinationof using the resourceutilization option and MAXNUMMP allows multiplesessions.When you enter an unrestricted wildcard source file specification on the restorecommand and do not specify any of the options: inactive, latest, pick, fromdate,todate, or volinformation, the client uses a no query restore method for restoringfiles and directories from the server. This method is called no query restore becauseinstead of querying the server for each object to be restored, a single restorerequest is sent to the server. In this case, the server returns the files and directoriesto the client without further action by the client. The client merely accepts the datacoming from the server and restores it to the destination named on the restorecommand.Using the command-line client, an example of an unrestricted wildcard commandwould be:c:\mydocs\2004\*An example of a restricted wildcard file specification would be:c:\mydocs\2004\sales.*168 IBM Tivoli Storage Manager for Windows Backup-Archive Clients: Installation and User's Guide