72 IBM Tivoli Storage Manager Versions 5.4 and 5.5 Technical Guide
7.1 Introduction to active-data pools
Active-data pools have been designed to provide Tivoli Storage Manager administrators with
the ability to segregate active and inactive files in the servers storage hierarchy. Active data
storage pools (ADPs) allow you to organize active data that is likely to be restored so that
restores would not need to access tapes containing inactive data. If you keep many versions
of files, searching tapes for active versions of files that are mixed with inactive versions can
take a long time. By storing only the active versions together on tapes, the time it takes to sort
through the inactive files is eliminated. For Tivoli Storage Manager, this means keeping only
the active versions of files in a storage pool strictly defined for such a purpose.
7.1.1 Definition
Setting up an ADP depends on whether your intended use is for faster client restore or
onsite/off-site storage of active data. You first need to determine which nodes’ data you want
to store in an ADP. If you want an ADP for fast client restore, you define an ADP with a FILE
device class. Define an ADP with a device class of any removable media if your intended use
is for onsite/off-site storage of active data.
You define an ADP with the DEFINE STGPOOL command, specifying
POOLTYPE=ACTIVEDATA. A storage pool so defined will contain only active versions of
client backup data and must be assigned to a sequential access device class. For the
purposes of faster client restore, the ADP should be assigned to a FILE device class. For the
purposes of storing active data offsite, the device class can be any removable sequential
device class, such as tape or optical.
Figure 7-1 shows the three different types of storage pool now available with Tivoli Storage
Manager, and the eligible device classes that can be used for each.
Figure 7-1 Tivoli Storage Manager: storage pool types
Types of active-data pools
There are two main reasons to implement ADPs: for faster onsite client restore or to have
active data available off site. ADPs for faster client restore are typically configured on
Random Disk
Sequential Disk
(FILE)
Pri mary
Copy Pool
Ne w:
Active Data
Pool
Sequential Tape
Sequential Disk
(FILE)
Sequential Tape
Sequential Disk
(FILE)
Sequential Tape

Get IBM Tivoli Storage Manager Versions 5.4 and 5.5 Technical Guide now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.