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IBM Tivoli Storage Manager

IBM's Workstation DataSave product was developed in the late 1980s at the Almaden Research Center to meet customer requirements for distributed network backup. The product underwent significant redevelopment to become the ADSTAR distributed storage Manager (ADSM) in 1993 and was later renamed IBM Tivoli Storage Manager (TSM). The need for network backup emerged from distributed client/server computing driven by the proliferation of personal computers and workstations. The goal was to centralize the protection of distributed data in an environment where information assets were no longer restricted to controlled mainframe environments. Backing up individual computers to locally attached devices was, and still is, costly and error-prone, and often does not meet requirements for disaster recovery. With IBM TSM, clients can back up their data to central servers, which store the data on a variety of media and track its location for later retrieval. TSM protects data from hardware failures and other errors by storing backup and archive copies of data on offline storage.

Scaling to protect hundreds of computers running a dozen operating systems ranging from laptops to mainframes and connected together via the Internet, WANs, or LANs, TSM's centralized Web-based management, smart-data move and store techniques, and comprehensive policy-based automation all work together to minimize data protection administration costs and the impact to both computers and networks. Optional modules allow business-critical applications that must run 24 × 365 to utilize TSM's centralized data protection with no interruption to their service.

Methodology of Backup

IBM TSM uses progressive incremental backup rather than the full-plus-incremental/differential methodology of some of the other backup solutions. Its sophisticated architecture allows it to just back up new or changed files. Likewise, when you are doing a restore, only the version of the files requested is restored, so there is no need to restore a full and then incremental or differential backups on top of that.

Principles of Recovery

TSM has the ability to automatically create as many copies of the backed-up data onto whatever type of media you specify. This capability can be scheduled for administrator ease. TSM only creates copies of the files that were not previously backed up. TSM can also reclaim space on off-site copies. TSM also can simultaneously create copies of data at the time of initial backup. This is done with a simultaneous write to primary and copy storage pools. TSM has an open API that allows for integration by any interested third party or any company who wants to further integrate with TSM. The Kernel Group (acquired by VERITAS Software) has integrated their Bare Metal Restore product with TSM, providing true bare metal recovery of a failed system.

High Availability

IBM TSM supports integration with Windows clustering and AIX HACMP from a hardware integration perspective, and works well with IBM ESS (Shark) FlashCopy and EMC Symmetrix TimeFinder.

Key Differentiators

One of the things that differentiates IBM TSM's product from the field is its relational database architecture and transaction logging. This enables a host of unique capabilities including:

  • Backing up just files that have changed or are new

  • Migrating data from one type of media to another

  • Performing advanced tape management capabilities that allow for the reclamation of dead space on tapes caused by expiring files

  • Managing archives of data for a specified amount of time

  • Performing accurate restores of files so that only the requested version of the files is restored

  • Allowing highly flexible policies that can be easily changed and made retroactive



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Implementing Backup and Recovery(c) The Readiness Guide for the Enterprise
Implementing Backup and Recovery: The Readiness Guide for the Enterprise
ISBN: 0471227145
EAN: 2147483647
Year: 2005
Pages: 176

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