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NaradaBrokering: Managing data distribution in distributed systems

NaradaBrokering: Managing data distribution in distributed systems. Shrideep Pallickara Community Grids Lab Indiana University. Data Distribution Problem. Data dissemination Registration of interest Receipt of data when we need it Radio, TV, Cell-phones

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NaradaBrokering: Managing data distribution in distributed systems

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  1. NaradaBrokering: Managing data distribution in distributed systems Shrideep Pallickara Community Grids Lab Indiana University

  2. Data Distribution Problem • Data dissemination • Registration of interest • Receipt of data when we need it • Radio, TV, Cell-phones • Routing data in distributed systems. • What, where, when, why and how. VLab Workshop: July 20-23 2005

  3. VLab Workshop: July 20-23 2005

  4. Problems unique to our situation • Rate and size of data is not fixed. • Data Selectivity • Data Volumes • Producer-Consumer roles • Clear de-coupling of roles. • Best-effort is not enough! VLab Workshop: July 20-23 2005

  5. Data Distribution in Distributed Systems: Characteristics (I) • I don’t know who will be sending me the data, but I know what I want and don’t. • Send me everything that I am interested in. • Don’t send me anything that I am not interested in. • Don’t reveal/send my data to someone else. VLab Workshop: July 20-23 2005

  6. Data Distribution in Distributed Systems: Characteristics (II) • Send me what I want, in a timely manner, when they occur • Make sure data is secure • Manage and interoperate with multiple data formats. • Global scope of dissemination • Producer’s ability to restrict who receives data VLab Workshop: July 20-23 2005

  7. System Constraints • Large number of clients/entities. • System is in constant flux. • Very high data rates • Voluminous data sizes • High selectivity • Susceptibility to hardware/software failures • Guaranteed delivery • Preserve data ordering VLab Workshop: July 20-23 2005

  8. Packaging data • Data is packaged within events (akin to a mailing envelope) • Events encapsulate data and include descriptors related to routing, transport protocols, timestamps, content synopsis etc. • Events thus have expressive power at multiple levels. VLab Workshop: July 20-23 2005

  9. Additional NaradaBrokering Services • Replay and Recording • Buffering and time-spacing • Discovery • Timing (synchronized clocks on nodes) • Fragmenting/Coalescing large payloads • Compressing/Decompressing data • HPSearch Project: Easy deployment of large broker networks. VLab Workshop: July 20-23 2005

  10. NaradaBrokering Application domains • Distance education • Real-time audio/video conferencing • Grid applications • GIS settings • Web Service infrastructures • Visualization services VLab Workshop: July 20-23 2005

  11. Visualization Services • Substrate discovers services that are capable of performing requested visualization task(s) • Can cope with multiple replicas of visualization servers • Substrate preferentially deploys replica that is most under-utilized • Facilitates dynamic, real-time load-balancing • Can sustain failures to replicas VLab Workshop: July 20-23 2005

  12. Final Comments • Open source technology • Deployed in wide variety of settings • Multiple entry points to avail of capabilities and services offered by the substrate • Additional Info http://www.naradabrokering.org/ VLab Workshop: July 20-23 2005

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