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Installation and User's Guide

Installation and User's Guide

Installation and User's Guide

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To control an open file support operation with LVSA, you can specify theseadditional options in your dsm.opt file or as values of the include.fs option:snapshotcachelocation, snapshotcachesize, snapshotfsidleretries, snapshotfsidlewait,presnapshotcmd, postsnapshotcmd.Note:1. You can use the include.fs option to set snapshot options on a per file systembasis.2. Use the snapshotcachelocation option to relocate the cache if necessary. You canspecify a snapshotcachelocation for a specific drive using the include.fs option.3. Open file support is only available for local fixed volumes (mounted to eitherdrive letters or volume mount points) formatted with FAT, FAT32 or NTFS filesystems. This support includes SAN-attached volumes that meet theserequirements.4. If the client is unable to create a snapshot, failover to non-OFS backup occurs;the same backup support that would be done if the OFS feature was notconfigured.5. To enable open file support in a cluster environment all systems in the clustershould have the OFS feature configured.Journal-based backupIf the journal engine service is installed <strong>and</strong> running, then by default theincremental comm<strong>and</strong> performs a journal-based backup on file systems which arebeing monitored by the journal engine service.Tivoli Storage Manager does not use the journaling facility inherent in WindowsNTFS file systems or any other journaled file system.The journal engine service records changes to an object or its attributes in a journaldatabase. During a journal-based backup, the client obtains a list of files that areeligible for backup from the journal database. Performing backups on a regularbasis maintains the size of the journal.Journal-based backup can increase backup performance. With journal-basedbackup, the client does not scan the local file system or obtain information fromthe server to determine which files to process. Journal-based backup also reducesnetwork traffic between the client <strong>and</strong> server.Tivoli Storage Manager filters the list based on the current include-exclude list.Tivoli Storage Manager processes, expires, <strong>and</strong> updates the resulting files accordingto policy constraints, such as serialization. The management-class copy frequencyattribute is ignored during journal-based backup.The journal engine service excludes specific system files (pagefile, registry, etc.)from having changes recorded in the journal. Because changes to these files are notjournaled, Tivoli Storage Manager does not back up these files. See the journalservice configuration file tsmjbbd.ini located in the Tivoli Storage Managerinstallation directory for specific system files that are excluded.To support journal-based backup, you must install the journaling engine service.Install this service by using the dsmcutil comm<strong>and</strong> or the GUI Setup wizard.If the file specification on the incremental comm<strong>and</strong> is a file space, Tivoli StorageManager processes any journal entries for that file space. Tivoli Storage Manager572 IBM Tivoli Storage Manager for Windows Backup-Archive Clients: <strong>Installation</strong> <strong>and</strong> <strong>User's</strong> <strong>Guide</strong>

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