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The following diagram illustrates features of the "gateway concept"
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The hardware to support gateway may be different from that natural for HPCC backends
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typical would be "corporate enterprise servers" such as high-end Unix (SUN, Linux?) servers or PC NT systems
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Several services would be controlled in "GrandeGateway" -- we illustrate this for collaboration which would allow sharing of information from clients and also backend Super(Grande) computers represented by proxies (e.g. Java or CORBA wrappers) at this level
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Tango supports user-consultant and multi-user interactions
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Habanero would show same logical diagram as Tango
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There is no clean 1:1 mapping of hardware and software tiers
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For instance a "logically backend" Oracle database could be hosted on the same SUN Enterprise server running Java servers supporting collaboration, access and other services
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