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THINC

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  1. Ricardo A. Baratto Network Computing Lab Columbia University THINC

  2. THIN CLIENTS FOR THE FUTUREorTHin client InterNet Computing

  3. Features • Fast • Secure • Hardware Cursor • Video support • Resizable • Bandwidth scheduling

  4. System Architecture • Server: Virtual video driver • Translates driver commands to THINC commands: • RAW • FILL • BITMAP • TILE • Commands: • Initial compression almost free • Nice abstraction: manage and manipulate as needed

  5. Offscreen Awareness • Render offscreen, copy onscreen • Translation impossible: Everything is RAW!!! • Solution: • Capture commands everywhere and follow them

  6. Push with a twist • Server Pushes data to client but, • Server is aware of each client's responsiveness: • Does not block • Commands can be clipped and evicted

  7. Command Scheduling • Improve interactiveness • Particularly useful in slow networks • Multiqueue and Preemptive • Two traffic classes: • Real Time: Cursor, keystrokes, mouse drag, DnD • Normal: ordered by size • We don't like ads

  8. Resize • Small Screens • Bandwidth reduction • Magnify too! • Future: Resize & Clip

  9. Video S: really? T: yup. full motion, resizable, application transparent, low CPU overhead. AND, no need for GbE S: but... how? T: just get out of the way! S: eh? T: export the client's hardware to the server and just be a bridge S: <stares in disbelief as the video plays> catch: There's no sound. Yet.

  10. Results and Comparisons

  11. Features and Optimizations Latency Data Size Per page

  12. Web Data Size Latency Per page

  13. Video

  14. The Future • Generic Device Support • Sound for the video!!! • Network resilience • Collaboration • Games • ...

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