TACC Update DaedalusBARWAN Winter Retreat, January 1998

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TACC UpdateDaedalus/BARWAN Winter
Retreat,January 1998

• Armando Fox
• fox_at_cs.berkeley.edu

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Outline

• TACC Review Status
• New TACC Services and CS 294-6 Internal
  Technology Transfer
• Thin Clients Computing By Proxy
• Publication/Ongoing Research Activities
• Summary

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Layered Model of Internet Services
httpd, etc.

• TACC Layer
• Programming model based on composable building
  blocks
• SNS Layer large virtual server
• Implements SNS requirements
• Cluster computing for hardware F/T and
  incremental scaling

TACC
ScalableNetwork Svc

• Exploit TACC model semantics for software F/T
• SNS layer is reusable and isolated from TACC
• Focus on application content
• Applications get SNS behaviors for free

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Whats TACC?

• Transformation (one-to-one)
• TranSend, Anonymizer
• Aggregation (many-to-one)
• Search engines, crawlers, my headlines
• Caching
• Both original and TACC-generated content
• Mass Customization
• Per user for content generation
• Per device data delivery, content packaging

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TACC Examples

• HotBot search engine
• Query crawlers DB
• Cache recent searches
• Customize UI/presentation
• TranSend transformation proxy
• On-the-fly lossy compression of inline images
  (GIF, JPG, etc.)
• Cache original transformed
• User specifies aggressiveness, refinement UI,
  etc.

A
DB
T
html

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TACC Conceptual Data Flow
To Internet
FE
User request

• Front end accepts RPC-like user requests
• Original data fetched from cache or Internet
• Users customization profile retrieved
• Aggregators/transformers operate on data
  according to customization profile

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Logical TACC Server Architecture

• Component replication for scaling and FT
• NOW with scalable interconnect
• Incremental scaling commodity building blocks

C
FE



FE
W
W
W
A
W
W
W
T
FE
GUI
LB/FT
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TACC Contributions

• TACC programming model
• Transformation, Aggregation, Caching,
  Customization can all be composed
• Encourages software structure that admits of
  simple F/T mechanisms
• Captures a large class of services
• Cluster-based framework to instantiate TACC
• Allows TACC authors to ignore SNS requirements
• Performance, scalability, and failure management
  adequate for real workloads
• Stock hardware

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TACC Server Status

• Production cluster running at UCB since 4/97
• TranSend web accelerator
• Virtually zero downtime and zero maintenance
• Software distribution in progress
• Binaries for Solaris and Linux
• Source snapshot
• SDK and additional modules coming soon
• Used as testbed for CS 294-6 graduate seminar

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CS 294-6 Internet Services

• Survey design implementation of Internet
  services
• Design and implement a service using TACC
• Best ones deployed permanently, like TranSend
• Real developers a way to stress the software
  infrastructure (and documentation!)
• Encourage other research projects to leverage TACC

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New Services Deployed

• Safe worker upload and execution
• Cha-Cha, combining browsing and searching
• Group Annotation for the Web
• Top Gun Wingman, worlds only graphical Web
  browser for the Palm Pilot
• Top Gun MediaBoard
• RTSP Archive Server
• Others http//www.cs.berkeley.edu/fox/cs294-6/

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Safe Worker Upload/Execution

• ISAAC group David Wagner, Prof. Eric Brewer
• Any user can author a new worker/module
• New workers are uploaded dynamically into a
  running TACC server
• TACC route selection forms-based interface used
  to select worker(s) for each MIME type
• Workers run in a Janus sandbox

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Cha-Cha Contextualizing Search

• BAILANDO project Mike Chen, Jason Hong, Prof.
  Marti Hearst (UCB SIMS)
• TACC implementation improves performance
  scaling of Cha-Cha prototype

Query(A)
HotBot
html
Cha-Cha
Layout(T)
Combine(A)
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Group Annotation

• Multivalent Documents/Digital Libraries project
  Marcel Kornacker, Ray Gilstrap, Tom Phelps, Prof.
  Robert Wilensky
• Annotate the Web, without owning it

Web browser
Anno.Svr.
MVDEditor(Java)
UI
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RTSP Archive Server Front End

• MASH project Angela Schuett, Suchi Raman, Prof.
  Steve McCanne
• Goal Add scalability and availability using TACC

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Thin Clients Top Gun Wingman

• Worlds only graphical browser for PalmPilot
  handheld device
• 5000 users worldwide
• Richest feature set of any Pilot browser, many
  uniquely enabled by proxy
• 9 out of 100 in Peoples Choice awards

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Groupware Top Gun MediaBoard

• mb comes to the Pilot
• Combines MASH tools with TACC server
• Enables future MASH collaboration
• Inherits TACC robustness scalability

• Superiority of proxy-based approach to enabling
  thin clients successfully demonstrated.

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Publication Activities

• Invited submission to IEEE Personal Comms.
• Special issue Adapting to network and client
  variability
• Structure, data semantics, and implementation of
  interactive Internet applications
• Collaboration with Dr. Murray Mazer, Open Group
  Research Institute
• Past work on annotating the Web and using HTTP
  proxies to build Web applications
• Top Gun Wingman

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Summary

• Validation of proxy architecture for thin clients
• Wingman is the fastest browser and the only one
  with graphics MediaBoard is unprecedented
• (Continuing) validation of methodology platform
  for building scalable Internet services
• Successful internal external tech transfer
• CS 294-6 projects
• Wingman, MediaBoard, MASH collaboration
• TranSend at UC Davis, SRI, soon Lucent
• Next time the eye-watering demo

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Credits

• Top Gun Wingman Ian Goldberg, Anthony Polito,
  David Lee
• Top Gun MediaBoard Yatin Chawathe, Steve Fink
• MASH/TACC integration Yatin Chawathe
• RTSP Archive Server Angela Schuett, Suchi Raman
• Cha-Cha Mike Chen, Jason Hong, Prof. Marti
  Hearst
• Annotate the Web Marcel Kornacker, Ray Gilstrap,
  Tom Phelps, Prof. Robert Wilensky
• Secure upload David Wagner