2006-09-29: Data Viewer by AJAX

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Title: Data Viewer by AJAX
Date: September 29, 2006
For User: DataFed
Status: InProgress
About Project or Tool: {{{about}}} (Add New project or tool)
Objective: [[:{{{Objective}}}]] (Add New Objective)

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This is a brief summary of (Kari-Rudy) discussion on AJAXing our DataFed data viewers and other apps. Currently, all the processing and rendering is taling place on the server. In making a view, there are a large number of images chashed in the server form all the sessions/processes running for the many users.

The key features of the new approach:

• View state is split: some on the server, other part on the client
• The flow control is at the client
• View is separated into layers: the client sends requests for individual layers (images) BTW, this means that we can get WMS layers from other servers??.
• As the layer images come in, the client performs the overlay .. as in the old SVG implementation
• The result of this desiggn is
  • More responsive interaction - parallel execution of data layers
  • Less burden on the single DataFed server
  • Service mashing at a coarse (e.g. layer) level, moving closer to peer-to-peer computing

More updates on this as we inch toward implementation.

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