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Post-PC Summary

Post-PC Summary. Prof. Eric A. Brewer brewer@cs.berkeley.edu. Original Goals. Basics: web, e-mail access, search engine Groupware: whiteboard, web-based calendar Wireless and cradle access Document conversion: PostScript, PDF, class notes, PowerPoint

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Post-PC Summary

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  1. Post-PC Summary Prof. Eric A. Brewer brewer@cs.berkeley.edu

  2. Original Goals • Basics: web, e-mail access, search engine • Groupware: whiteboard, web-based calendar • Wireless and cradle access • Document conversion: PostScript, PDF, class notes, PowerPoint • WorkPad as “smart card” for authentication

  3. Phase 1 Complete… • Basic development infrastructure in place • Pilots used in one class, and in several grad-level projects • Significant progress on security, network “HotSync”, and service infrastructure • Key applications emerging: notes, e-mail, group calendar

  4. Some Lessons • Virtual Environment really is a good thing • Network HotSync, groupware, centralized e-mail • WorkPad is too slow… • adaptation is a trade of cycles for bandwidth and interoperability

  5. Lessons… • Development effort is the limiting factor • OSKI: 1 person for infrastructure, 2 for WorkPad • Debugging is particularly hard (need better simulation environment) • “User Service” is fundamental • not just profile and customization info • routing point for security

  6. Phase 2: Real Users • Deploy some real WorkPad services • Secure e-mail • Network HotSync • Group Calendar • Widespread use of at least one service • more than 50 users? • highly available/reliable

  7. Backup Slides

  8. Computing in the Infrastructure • Legacy server compatibility • Partition functionality for “small” clients • Amortize resources across many clients • Can combine with distributed caching • Enable groupware (via shared state) • Enable consistent virtual environment

  9. Thin Clients: Top Gun Wingman • World’s only graphical browser for PalmPilot • > 10,000 users worldwide • Richest feature set of any Pilot browser, many uniquely enabled by proxy • #9 out of 100 in “People’s Choice” awards

  10. Groupware: Top Gun MediaBoard • Group whiteboard comes to the Pilot • Combines MASH tools with proxy • Enables future MASH collaboration • Inherits proxy robustness & scalability • Interoperates with laptops, workstations Superiority of proxy-based approach to enabling “thin” clients successfully demonstrated.

  11. Distillation Proxy Architecture Proxy front-end Servers fast LAN or SAN Image Audio Datatype- specific Distillers Video Text

  12. Datatype-Specific Distillation • Lossy compression that preserves semantic content • Tailor content for each client 6.8x 1.2 The Remote Queue Model We introduce Remote Queues (RQ), …. 65x

  13. Refinement • Retrieve part of distilled object at higher quality Zoom in to original resolution Distilled image (by 60X)

  14. C FE $ $ $ FE W W W Interconnect A W W W T FE GUI LB/FT Scalable Proxy Architecture • Component replication for scaling and FT • NOW with scalable interconnect • Incremental scaling: commodity building blocks

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