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Scale The distributed DRUM architecture provides high availability and reduces impact on network infrastructure. DRUM scales to support millions of elements, yet can still be economically deployed in smaller networks thanks to its modular design.DRUM consists of a series of Distributed Data Collection Units (DDCU) that are placed throughout your network. Each DDCU collects data from only those network elements in its vicinity, so network overhead is drastically reduced. 
Each DDCU can typically support up to 100,000 network
elements, and DDCUs may be added as necessary.
At the core of the network lies one or more Database servers that collect and combine data from the DDCUs. Web servers round out the DRUM architecture, providing the interface into DRUM as well as the reporting services. Every network changes and grows in its own unique way, so each element within DRUM is designed to be independently scalable to meet your evolving requirements.
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