Installation and User's Guide

statement. Tivoli Storage Manager provides a number of Data Protection clients(IBM Tivoli Storage Manager for Databases, IBM Tivoli Storage Manager for Mail,IBM Tivoli Storage Manager for Application Servers, etc.) which provide thisdatabase coordination and backup along with other advanced database backupfeatures. For a current list of Data Protection clients go to this Web site:http://www.ibm.com/software/tivoli/products/storage-mgr/product-links.htmlFor private applications or other database products where a Data Protection clientis not available, you can use the preschedulecmd option to signal the database orapplication to do one of the following:v Take the steps necessary to move these files to a consistent and unopen state.v Bring down the database before the file level backup is started.vProgram or script another method to back up this data and exclude these filesfrom the file level backup. In these cases the OFS feature is not necessary sincethese files are no longer unavailable or locked by the application. Once the filelevel backup has completed, use the postschedulecmd option to bring thedatabase back online or restart the application.If the time it takes to complete the file level backup is too long to have the openfiles offline (for example, having the database offline or holding up transactions),use the OFS feature to create a point-in-time snapshot of the volume. In this case,use the presnapshotcmd and postsnapshotcmd options to signal the database orapplication to coordinate with the backup of these open files. The snapshot, whichoccurs between the pre-snapshot command and post-snapshot command, shouldonly take a few seconds to create. This allows the database or application toresume operations quickly while still allowing Tivoli Storage Manager to perform afull incremental backup of the volume, including the locked files. There are othersituations where these application locked files can be safely backed up and restoredon a file by file basis. In these situations, you can enable the OFS feature for thatvolume where the open files exist. Tivoli Storage Manager file level backup thenhas access to these files and back them up using the Tivoli Storage Manager filelevel backup and archive operations.For information about Tivoli Storage Manager Open File Support restrictions andissues, search for the TSM Client Open File Support document, which is Technotenumber 1248971, at: http://www.ibm.com/support/entry/portal/Overview/Software/Tivoli/Tivoli_Storage_ManagerIf open file support has been configured, Tivoli Storage Manager performs asnapshot backup or archive of files that are locked (or "in use") by otherapplications. The snapshot allows the backup to be taken from a point-in-timecopy that matches the file system at the time the snapshot is taken. Subsequentchanges to the file system are not included in the backup. You can set thesnapshotproviderfs parameter of the include.fs option to none to specify whichdrives do not use open file support.To control an open file support operation you can specify these additional optionsin your dsm.opt file or as values of the include.fs option: snapshotproviderfs,presnapshotcmd and postsnapshotcmd. Additionally, when the LVSA is thesnapshot provider, the following additional options can be specified:snapshotcachelocation, snapshotcachesize, snapshotfsidleretries, andsnapshotfsidlewait.Note:100 IBM Tivoli Storage Manager for Windows Backup-Archive Clients: Installation and User's Guide