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The advantage of Smart Grid and ICT communication brings up the power reliability achieved 99.999%. Data Center availability is critical concern of business continuous and growth in Internet service competitions. Data Center Tier IV requirement is design to accomplish 99.995% available operations. However, this legacy design for availability is coming up with high investment of redundant equipments and connectivity. Understanding of Data Center power distribution system (DCPDS) cascading failures lead to optimal design equipments and connectivity topology. To take advantage of Smart Grid to reduce investment of Data Center, this paper proposes a cognitive approach model of Next Generation Data Center (NGDC) design under Smart Grid ecosystem. Load shedding technique is presented in this research; it is applied to different parts of the power distribution system to protect the critical application servers by shutting down certain pre-arranged electric loads or IT equipments when the Data Center demand response exceeded power supply capacity.