Basics of IBM Tivoli Storage Manager
- 2. Introduction IBM Tivoli Storage Manager was earlier called as ADSM (Adstar Distributed Storage Manager), till IBM took it over. IBM Tivoli Storage Manager is a client/server program that provides centralized, automated data protection and storage management solutions to customers in a multivendor computer environment. IBM Tivoli Storage Manager provides a policy-managed backup, archive, and space-management facility for file servers, workstations, applications, and application servers. Versions in Production: 5.4 / 5.5, 6.1 Major Difference in 5.x & 6.x , metadata limit raised from 530 GB to unlimited
- 3. Audience System Admins / Backup Admins Those who are new to IBM TSM This presentation may serve as notes to recall / refresh your concepts It should give you basic understanding
- 4. Basic Concepts Backup To guard against the loss of information, the backup-archive client can copy files, subdirectories, and directories to media controlled by the server. Backups can be controlled by administrator-defined policies and schedules, or users can request backups of their own data. Restore When a user restores a backup version of a file, the server sends a copy of the file to the client node. The backup version remains in server storage. Restoring a logical volume backup works the same way. Archive & Retrieve To preserve files for later use or for records retention, a user with a backup-archive client can archive files, subdirectories, and directories on media controlled by the server. When users archive files, they can choose to have the backup-archive client erase the original files from their workstation after the client archives the files. When a user retrieves a file, the server sends a copy of the file to the client node. The archived file remains in server storage. Versioning Versions are nothing but multiple copies of same file in chronology.
- 5. Basic Concepts… Retention Policy How many days you want to keep copies OR How many copies you want to retain. The final retention depends upon whichever condition of the above is satisfied. Default is 30 days for backup, 1 year for archive, default no. of versions is 4 Expiration Versions keep changing states: Active => Inactive => Obsolete You need to start a process to remove pointers of Obsolete files in Meta Data DB That process is called as expiration Reclamation Once you have expired files from your sequential devices, the space has invalid data. In order to use the space, you have to move data from one / more sequential devices to other devices (This is very similar to defragmentation, but as defragmentation does not work on sequential devices; you have to Move the data)
- 6. Basic Concepts… Collocation In order to reduce no. of sequential devices required we may need to collocate the data. Collocation need may also arise if we want to avoid reclamation situations. Collocation types: By node , By Group, By application Data Migration Hierarchy Random Storage devices Random Storage devices / SAN / NAS etc Sequential Storage Devices Data Migration Data can be migrated from random to random or random to sequential devices. But not from sequential to random devices. Data Migration can be triggered and stopped using these two values: High Threshold Value (Default is 90%) Low Threshold Value (Default is 70%)
- 7. Components of Policy Versioning Details Retention Details Schedules details Storage pool detailss not work on sequential devices; you have to Move the data) Backup and archive details
- 8. Complete Install Requires following: Backup / Archive Clients Tivoli Server Manager (Storage Server) Integrated Solutions Console Administration Center
- 9. Components of TSM Storage Pools Meta Data DB Recovery Logs Configured Settings
- 10. Metadata DB includes information such as: Object ID, index Version Status of backup Time stamp User / Group Filespace_name, Filespace_id HL_name, LL_name Etc.
- 11. TSM Server Important Files: DSMServ.exe DSMServ.dsk Includes FQN, logv, dbv info InitServ.log Server Installation Logs Devcnfg.out Device class info, server name, instance name etc. Vollist.out Volume library info, info of db backups, export info. DSMServ.out Parameters / Settings for the instance / server.
- 12. BA Client Important Files: Dsm.opt Node name Server address Server tcp port And other configurable parameters. Dsm.exe BA Client GUI Dsmc.exe BA Client CLI Dsmadmc.exe Administrative utility
- 13. Summary Introduction to IBM Tivoli Storage Manager Basic Concepts of Storage Metadata info Components of policy, TSM, TSM Server, BA client Please, note this presentation should be used as a note to recall. It may not help you to understand technologies. A lot of trademarked words are used, they belong to respective orgs. This doc may not contain correct information, so I disclaim any responsibilities.
- 14. Resources IBM Redbooks Adsm.org Publib.boulder.ibm.com Lascon.co.uk