Back up and restore policy management is a critical piece to your GRC (Governance, Risk, Compliance). Policy management encompasses all the rules for where data is stored, how many versions can be stored, and for how long it is stored.
Consider that data is not only to be backed up for protection of a catastrophic event, but, it also needs to be restored for many different purposes and meet varying requirements. This requires Data Backup strategies must be planned and policies developed to assure all company requirements regarding data retention and recovery are met, such as;
- Regulatory Requirements
- Data Breaches
- Court Orders
Tivoli Storage Manager (TSM) provides backup and restore policy management. Policies in TSM are rules that determine how data is stored and managed. The rules include where the data is initially stored, how many backup versions are kept, how long archive copies are kept, and so on. You can have multiple policies and assign the various policies as needed, or even to specific files. Policies Assign a location in server storage where data is initially stored.
Server storage is divided into storage pools that are groups of storage volumes. Server storage can include hard disk, optical, and tape volumes.
Clients use Tivoli Storage Manager to store data for any of the following purposes:
- Backup and restore: The backup process copies data from client systems to server storage to ensure against loss of data that is regularly changed. A policy includes the number of versions and the retention time for those versions. The server retains versions of a file according to this policy, and replaces older versions of the file with newer versions.
- Archive and retrieve: The archive process copies data from client systems to server storage for long-term storage. The process can optionally delete the archived files from the client systems. The server retains archive copies according to the policy for archive retention time. A client can retrieve an archived copy of a file.
- Backup set recovery: Backup set recovery is the creation of a complete set of backed-up files for a client. The set of files is called a backup set. A backup set is created on the server from the most recently backed-up files that are already stored in server storage for the client. The policy for the backup set consists of the retention time that you choose when you create the backup set. You can copy a backup set onto compatible portable media, which can then be taken directly to the client for rapid recovery without the use of a network and without having to communicate with the Tivoli Storage Manager server.
- Migration and recall Migration: is a function of the Tivoli Storage Manager for Space Management (for supported UNIX and Linux systems) and Tivoli Storage Manager HSM for Windows programs. It frees client storage space by copying files from client systems to server storage. On the client, the program replaces the original file with a stub file that points to the migrated file in server storage. Files are recalled to the client systems when needed. The process of migrating and retrieving data through these programs is transparent to users and applications, other than a possible degradation in performance as compared to data stored on locally attached, tier one disk. Policy determines when files are considered for automatic migration. On the UNIX or Linux systems that support the Tivoli Storage Manager for Space Management program, policies determine whether files must be backed up to the server before being migrated. Space management is also integrated with backup. If the file to be backed up is already migrated to server storage, the file is backed up from there.
To learn more about data backup and restore policy management, contact Salvus Data Consultants, Tivoli Storage Management experts.