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Tivoli Storage Manager (TSM) is a centralized policy-based data backup and recovery software, it enables a user to backup, restore, archive, and retrieve data from a hierarchy of data storage areas, known as pools.
The "pools" can be a hierarchy of disk, optical, and tape-based media.
A typical TSM installation allows data backups from TSM clients to be spooled to random-access disk storage attached to the TSM server, this data is then migrated at a later date to cheaper storage, such as tape or optical disk.
Along with the basic backup and recovery function, a policy-based hierarchical storage management component allows transparent migration from a client device to the TSM server and vice versa of infrequently accessed data on demand, TSM also enables LAN-Free and server-free backup in SAN fabric environments.
Since Tivoli were purchased by IBM this product has been re-branded as IBM Tivoli Storage Manager and is part of the IBM "TotalStorage" suite of products.
The current 5.4 release of the TSM Server is supported on AIX, HP-UX, Linux, Solaris, Windows Server and z/OS, however the TSM Client is supported on NetWare, Macintosh, AIX, HP-UX, Linux, z/OS, Solaris, and Windows.