As enterprises are opening their information system to their partners and the performance of means of telecommunication increases, the volume of enterprise data increases exponentially. Considering the strategic value of the information assets of the enterprise, it therefore becomes necessary to implement warehousing means to preserve these data. Nonetheless, the speed at which warehousing technologies develop may render a tape or optical disk-based storage system obsolete very quickly. In addition, the constraints imposed by laws regarding the invidivudal liberties or the legal obligations of enterprises must also be taken into account. All of these criteria therefore make it necessary to implement an overall storage and warehousing strategy for enterprise data.

Introduction to ILM

ILM (Information Lifecycle Management) consists in using a comprehensive approach in terms of efficient management of the information assets of the company depending on the value of the information and the cost of storing it.

ILM is a comprehensive approach whose goal is, on one hand, the efficient use of the means for the storage of information to take into account the must suitable technical, regulatory, and legal requirements for storing information and making it available and, on the other hand, to ensure tracking the life cycle of documents.

ILM therefore covers the concepts of availability and speed of access to information depending on the development of its value over time, from the time it is created until it is destroyed.

ILM makes it possible to appy different storage rules depending on the value of the data to be stored to better meet the following criteria:

• usefulness of the data
• security requirements: integrity, confidentiality, and availability of data
• regulatory requirements regarding the data
• access time to the data
• cost of storage

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