An introduction to udt l.jpg
This presentation is the property of its rightful owner.
Sponsored Links
1 / 10

An Introduction to UDT PowerPoint PPT Presentation


  • 71 Views
  • Uploaded on
  • Presentation posted in: General

Internet2 Spring Meeting. An Introduction to UDT. Yunhong Gu [email protected] Robert L. Grossman (Advisor) National Center for Data Mining University of Illinois at Chicago. What's UDT?. UDT: U DP-based D ata T ransfer Protocol

Download Presentation

An Introduction to UDT

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


An introduction to udt l.jpg

Internet2 Spring Meeting

An Introduction to UDT

Yunhong [email protected]

Robert L. Grossman (Advisor)

National Center for Data Mining

University of Illinois at Chicago


What s udt l.jpg

What's UDT?

  • UDT: UDP-based Data Transfer Protocol

  • Application level, end-to-end, unicast, reliable, connection-oriented, streaming data transport protocol.

  • Successor of SABUL

  • Open source C++ Implementation


Layered architecture l.jpg

Layered Architecture

Applications

UDT Socket API

User Space

UDT

Memory Copy Avoidance

OS Socket Interface

Kernel

UDP


Flow congestion control l.jpg

Flow/Congestion Control

  • AIMD: Additive Increases Multiplicative Decreases

  • Increase Parameter

    • Related to available bandwidth

    • Bandwidth estimation: automatic parameter tuning

  • Decrease Factor

    • Randomized decrease factor: alleviate loss synchronization problem


Performance characteristics l.jpg

Performance Characteristics

  • Efficiency

    • Approximately constant time to probe 90% of available bandwidth

  • Fairness

    • Intra-protocol fairness (max-min)

    • RTT independent

    • TCP friendly


Configurable congestion control l.jpg

Configurable Congestion Control

Applications

CC

UDT Socket API

User Space

UDT

OS Socket Interface

Kernel

UDP


How to use udt l.jpg

How to Use UDT?

  • Linux

    • Ported to Windows, UNIX, BSD, and OS X

  • C++ API

    • socket-like API

  • Transport Middleware

    • XIO UDT Driver

  • C API

    • No changes for existing applications, just recompilation and link

    • Limitation: no "fork"

  • Java and Python wrapper


Non objectives and limitations l.jpg

Non-objectives and limitations

  • Not a replacement to TCP

    • For bulk data transfer over high-speed wide area networks, where TCP does not work well

    • UDT is designed to co-exist with TCP

  • Built-in control algorithm is not suitable for applications requires real-time, messaging, lossy, or smooth data traffic.

  • Not suitable for high concurrency (a large number of flows sharing the network)


Http udt sf net l.jpg

http://udt.sf.net

  • UDT Source Code

  • Stable release (v2.0)

  • CVS (most recent update and bug fixes)

  • Technical papers

  • Online documentation


Questions http udt sf net http www ncdm uic edu gu@lac uic edu l.jpg

Questions?http://udt.sf.nethttp:[email protected]


  • Login