Since TANGO uses central server architecture, there are system scalability concerns.
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System makes careful distinction between event and data distribution pathways
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events are always distributed via collaboratory server
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data may be distributed via collaboratory server for thin data streams
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voluminous data are either distributed directly between application instances or delivered from HTTP or other servers
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peer-to-peer application data exchange may use multicast if necessary
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certain TANGO applications are therefore implemented as Web browsers for specialized data types (e.g., GIS Open Inventor Web browser)
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