Installation and User's Guide - Services and Support

IBM ConfidentialTable 12. List of applications to configure (continued)To use these features: You must configure these applications:v VSS Backupv VSS Restorev VSS Instant Restorev Off-loaded backupv Data Protection for Exchangev Tivoli Storage Manager serverv Tivoli Storage Manager backup-archiveclient schedulerv Tivoli Storage Manager backup-archiveclient local CAD (Local DSMAGENT Node)v Tivoli Storage Manager backup-archiveclient remote CAD (Remote DSMAGENTNode)v VSS software provider and/or VSShardware providerPart I: Configuration overviewThis section provides guidelines about available options, recommended settings,and other useful information needed to configure Data Protection for Exchange. Itis recommended that you review this information before performing theconfiguration tasks described in “Part II: Configuration procedure” on page 44. Foran overview of the various VSS components, see “VSS Service” on page 5.Back up to Tivoli Storage Manager storage versus back up tolocal shadow volumesWhen creating policy for your backups, consider these differences between backingup data to Tivoli Storage Manager storage versus VSS disks.Tivoli Storage Manager storageBackups to Tivoli Storage Manager server storage are usually dictated by time, notversions.A Tivoli Storage Manager backup operation stores the backed up data on TivoliStorage Manager server storage. Although this type of backup typically takeslonger to process than a backup to local shadow volumes, a Tivoli StorageManager backup is necessary when long term storage is needed such as savingExchange data on tape for archival purposes. Tivoli Storage Manager backups arealso necessary for disaster recovery situations when the disks that are used forlocal backups are unavailable. By maintaining multiple backup copies on TivoliStorage Manager server storage, a point in time copy is available should backupson the local shadow volumes become corrupt or deleted.Local shadow volumesBackups to local shadow volumes are usually dictated by versions because of spacelimitations and provisioning of VSS storage.Sufficient local storage space must be available on local shadow volumes for a VSSbackup strategy to be successful. Make sure there is enough available storage spaceassigned to the volumes to accommodate your Data Protection for Exchangebackup operations. Environment and storage resources also impact how manybackup versions are maintained on local shadow volumes (for VSS Fast Restoreand VSS Instant Restore) and how many backup versions are maintained on Tivoli32 Storage Manager for Mail 5.5: Data Protection for Microsoft Exchange Server Installation and User’s Guide