In this paper, we present the Daffy data model and messaging framework for data centers. The model is a hybrid model, combining physical, structural, geometrical, and logical modeling techniques. The messaging scheme has excellent performance and allows for the loose coupling of the various framework components. The framework bridges the gap between facilities and IT domains and enables the holistic, cross-domain management of data centers. The framework supports rich visualization, cross-domain queries and sophisticated cross-domain autonomic control systems.

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