Chapter 1. Introduction to ILM 7
Figure 1-3 ILM elements
In the next four sections we describe each of these elements in detail:
1.3.1, “Tiered storage management” on page 7
1.3.2, “Long-term data retention” on page 9
1.3.3, “Data lifecycle management” on page 12
1.3.4, “Policy-based archive management” on page 14
1.3.1 Tiered storage management
Most organizations today seek a storage solution that can help them manage data more
efficiently. They want to reduce the costs of storing large and growing amounts of data and
files and maintain business continuity. Through tiered storage, you can reduce overall
disk-storage costs, by providing benefits like:
Reducing overall disk-storage costs by allocating the most recent and most critical
business data to higher performance disk storage, while moving older and less critical
business data to lower cost disk storage.
Speeding business processes by providing high-performance access to most recent and
most frequently accessed data.
Reducing administrative tasks and human errors. Older data can be moved to lower cost
disk storage automatically and transparently.
Typical storage environment
Storage environments typically have multiple tiers of data value, such as application data that
is needed daily and archive data that is accessed infrequently. But typical storage
configurations offer only a single tier of storage, as in Figure 1-4 on page 8, which limits the
ability to optimize cost and performance.
“The process of managing information,
from creation to disposal,
in a manner that aligns costs
with the changing value of information”
Incorporates tiered storage and
advanced SAN technologies.
Storage ranging from enterprise disk, midrange
disk and tape to optimize costs and availability
Long-Term Data Retention
Address needs for risk and
leverages Content Management and
Records Management technologies
Data Life Cycle Management
Exploit Hierarchical Storage Management for
any data that needs to be protected and
retained for a period of time and then disposed.
Establish policies and automation to move data
among different storage systems
Policy-based Archive Management
E-mail, database and application archive.
Focused offerings driven by efficiency of major