ILM

ALSO CALLED: Data Lifecycle Management, Information Life-Cycle Management, Lifecycles, Information Life Cycle Management, Information Lifecycle Management, Data Life Cycle Management, and Life Cycles
DEFINITION: Data life cycle management (DLM) is a policy-based approach to managing the flow of an information system's data throughout its life cycle: from creation and initial storage to the time when it becomes obsolete and is deleted. DLM products automate the processes involved, typically organizing data into separate tiers according to specified policies, and automating data migration from one tier to another  … 
Definition continues below.

ILM DEFINITION (continued): …  based on those criteria. As a rule, newer data, and data that must be accessed more frequently, is stored on faster, but more expensive storage media, while less critical data is stored on cheaper, but slower media.Hierarchical storage management (HSM) is one type of DLM product. The hierarchy represents different types of storage media, such as RAID (redundant array of independent disks) systems, optical storage, or tape, each type representing a different level of cost and speed of retrieval when access is needed. Using an HSM product, an administrator can establish and state guidelines for … 
ILM definition sponsored by SearchStorage.com, powered by WhatIs.com an online computer dictionary