Performance Tuning for Content Manager

68 Performance Tuning for Content Manager

enterprise-class recovery solution, protecting business critical data from laptop to

systems, regardless of where it resides.

TSM supports business continuity by helping to automate disaster recovery

planning and recovery execution based on business priorities. TSM integrates

the power of applications-aware technology in the recovery of leading database,

content management, and workflow applications to ensure that the entire

business process is protected.

In the following sections, we provide a

very general overview of TSM capabilities,

advantages, and architecture. Our materials are extracted from existing TSM

publications. For more detailed information, see:

 Tivoli Storage Management Concepts, SG24-4877

 IBM Tivoli Storage Manager: A Technical Introduction, REDP0044

 Tivoli Storage Manager for AIX - Administrator’s Guide, GC32-0768

 Tivoli Storage Manager home page:

http://www.ibm.com/software/tivoli/products/storage-mgr/

2.3.1 TSM capabilities overview

TSM provides an interface to a range of storage media, including disks, tapes,

and optical disks. It enables Content Manager systems to support different

storage devices, drives, and libraries. TSM provides the following capabilities:

 Backup and restore

 Disaster preparation and recovery

 Archive and retrieve

 Hierarchical Storage Management

 Application protection, 24 hours a day, 365 days a year

Backup and restore

Complete data protection starts with data backups. Backups are a copy of the

active online data stored on offline storage. If an online storage device fails, a

data error occurs, or someone accidentally delete a file, the offline copy of that

data can be copied back to online storage restored. TSM provides backup and

restore functionality, using multiple techniques to reduce data transfer sizes to

the minimum possible. These techniques reduce the total time required for both

data backups and, more important, data restores.

Disaster preparation and recovery

Complete data protection also involves disaster preparation and recovery. Local

copies of data protect against discrete failures or errors in equipment, storage, or

Chapter 2. Content Manager base products 69

people. But disasters tend to happen to entire facilities, not just a portion of the

equipment inside those facilities.

Using Tivoli Storage Manager, you can prepare an additional copy of the active

data for safekeeping at an off-site location to provide extra insurance against

disasters. If a disaster strikes and destroys online storage and computers, the

off-site copy of the active data can be restored to new computers to get business

up and running quickly.

Archive and retrieve

Tivoli Storage Manager goes beyond data backups to include data archiving.

Archiving inactive data is an effective way to reduce your online storage costs.

The archive process creates a copy of a file or a set of files representing an end

point of a process for long-term storage. Files can remain on the local storage

media or can be deleted. The customer determines the retention period (how

long an archive copy is to be retained).

TSM also provides retrieval functionality to fetch the archived data for usage. The

retrieval process locates the copies in the archival storage and places them back

into a customer-designated system or workstation.

Hierarchical Storage Management

Tivoli Storage Manager includes an automated version of archive called

Hierarchical Storage Management (HSM), which provides the automatic and

transparent movement of operational data from the user system disk space to a

central storage repository. If the user accesses this data, it is dynamically and

transparently restored to the client storage.

As with archiving, HSM removes data from online storage and puts it on less

expensive offline storage. Unlike archiving, HSM leaves a data-stub on online

storage that shows the name of the removed file. With this stub, you can easily

access the offline data, albeit much more slowly than if it were online. HSM

capabilities are automated. It watches online data files to see how often they are

used. If the data are not opened for an administrator-specified length of time,

they will be removed to offline storage, leaving only the data -stub behind. For a

business with large amounts of data that do not need to be online at all time,

HSM is the best way to save on storage costs.

Application protection - 24x365

By directly controlling the time and method by which a data transfer to offline

storage occurs, the application can continue operating with no interruption, 24

hours a day, 365 days a year.